[Federal Register Volume 61, Number 178 (Thursday, September 12, 1996)]
[Rules and Regulations]
[Pages 48208-48288]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 96-22781]



[[Page 48207]]


_______________________________________________________________________

Part II





Environmental Protection Agency





_______________________________________________________________________



40 CFR Parts 9 and 63



National Emission Standards for Hazardous Air Pollutant Emissions: 
Group IV Polymers and Resins; Final Rule

  Federal Register / Vol. 61, No. 178 / Thursday, September 12, 1996 / 
Rules and Regulations  

[[Page 48208]]



ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 9 and 63

[AD-FRL-5508-6]
RIN 2060-AE37


National Emissions Standards for Hazardous Air Pollutant 
Emissions: Group IV Polymers and Resins

AGENCY: U.S. Environmental Protection Agency (EPA).

ACTION: Final rule.

-----------------------------------------------------------------------

SUMMARY: This action promulgates national emission standards for 
hazardous air pollutants (NESHAP) from existing and new plant sites 
that emit organic hazardous air pollutants (HAP) identified on the 
EPA's list of 189 HAP. The organic HAP are emitted during the 
manufacture of one or more of the following Group IV polymers and 
resins: acrylonitrile butadiene styrene resin (ABS), styrene 
acrylonitrile resin (SAN), methyl methacrylate acrylonitrile butadiene 
styrene resin (MABS), methyl methacrylate butadiene styrene resin 
(MBS), polystyrene resin, poly (ethylene terephthalate) resin (PET), 
and nitrile resin.
    In the production of thermoplastics, a variety of organic HAP are 
used as monomers or are created as by-products. Some of these organic 
HAP are considered to be mutagens and carcinogens, and all can cause 
reversible or irreversible toxic effects following exposure. The 
potential toxic effects include eye, nose, throat, and skin irritation; 
liver and kidney toxicity, and neurotoxicity. There effects can range 
from mild to severe. The standards are estimated to reduce organic HAP 
emissions from existing affected sources by 3,550 megagrams per year 
(Mg/yr).
    The intent of this rule is to protect the public by requiring the 
maximum degree of reduction in emissions of organic HAP from new and 
existing major sources. The emissions reductions achieved by these 
standards, when combined with the emission reductions achieved by other 
similar standards, will achieve the primary goal of the Clean Air Act 
(Act) as amended in 1990.

EFFECTIVE DATE: September 12, 1996. See the Supplementary Information 
section concerning judicial review.

ADDRESSES: Docket. Docket No. A-92-45, containing information 
considered by the EPA in development of the promulgated standards, is 
available for public inspection between 8 a.m. and 5:30 p.m., Monday 
through Friday at the following address in room M-1500, Waterside Mall 
(ground floor) U.S. Environmental Protection Agency, Air and Radiation 
Docket and Information Center (MC-6102), 401 M Street SW., Washington, 
DC 20460; telephone: (202) 260-7549. A reasonable fee may be charged 
for copying docket materials.

FOR FURTHER INFORMATION CONTACT: For information concerning 
applicability and rule determinations contact:
    Region I--Greg Roscoe, Air Programs Compliance, Branch Chief, U.S. 
EPA, Region I, SEA, JFK Federal Building, Boston, MA 02203, (617) 565-
3221.
    Region II--Kenneth Eng, Air Compliance Branch Chief, U.S. EPA, 
Region II, 290 Broadway, New York, NY 10007-1866, (212) 637-4000.
    Region III--Bernard Turlinski, Air Enforcement Branch Chief, U.S. 
EPA, Region III, 3AT10, 841 Chestnut Building, Philadelphia, PA 19107, 
(205) 597-3989.
    Region IV--Jewell A. Harper, Air Enforcement Branch, U.S. EPA, 
Region IV, 345 Courtland Street, N.E., Atlanta, GA 30365, (404) 347-
2904.
    Region V--George T. Czerniak, Jr., Air Enforcement Branch Chief, 
U.S. EPA, Region V, 5AE-26, 77 West Jackson Street, Chicago, IL 60604, 
(312) 353-2088.
    Region VI--John R. Hepola, Air Enforcement Branch Chief, U.S. EPA, 
Region VI, 1445 Ross Avenue, Suite 1200, Dallas, TX 75202-2733, (214) 
665-7220.
    Region VII--Donald Toensing, Chief, Air Permitting and Compliance 
Branch, U.S. EPA, Region VII, 726 Minnesota Avenue, Kansas City, KS 
66101, (913) 551-7446.
    Region VIII--Douglas M. Skie, Air and Technical Operations Branch 
Chief, U.S. EPA, Region VIII, 999 18th Street, Suite 500, Denver, CO 
80202-2466, (303) 312-6432.
    Region IX--Colleen W. McKaughan, Air Compliance Branch Chief, U.S. 
EPA, Region IX, 75 Hawthorne Street, San Francisco, CA 94105, (415) 
744-1198.
    Region X--Air and Radiation Branch Chief, U.S. EPA, Region X, AT-
092, 1200 Sixth Avenue, Seattle, WA 98101, (206) 533-1152.
    For information concerning the analyses performed in developing 
this rule, contact Mr. Robert Rosensteel at (919) 541-5410, organic 
Chemicals Group, Emission Standards Division (MD-13), U.S. 
Environmental Protection Agency, Research Triangle Park, North Carolina 
27711.

SUPPLEMENTARY INFORMATION:

Regulated Entities

    Entities potentially regulated by this action are those facilities 
which manufacture one or more of the 7 thermoplastic products 
identified in the rule and listed below:

------------------------------------------------------------------------
             Category                  Examples of regulated entities   
------------------------------------------------------------------------
Industry.........................  Facilities which manufacture         
                                    acrylonitrile butadiene styrene     
                                    resin, styrene acrylonitrile resin, 
                                    methyl methacrylate acrylonitrile   
                                    butadiene styrene resin, methyl     
                                    methacrylate butadiene styrene      
                                    resin, polystyrene resin, poly      
                                    (ethylene terephthalate) resin, or  
                                    nitrile resin.                      
------------------------------------------------------------------------

    This table is not intended to be exhaustive, but rather provides a 
guide for readers regarding entities likely to be regulated by this 
action. To determine whether your facility is regulated by this action, 
you should carefully examine the applicability criteria in Sec. 63.1310 
of the rule. If you have questions regarding the applicability of this 
action to a particular entity, consult one of the persons listed in the 
preceding FOR FURTHER INFORMATION CONTACT section.

Response to Comment Document

    The response to comment document for the promulgated standards 
contains: (1) A summary of all the public comments made on the proposed 
rule and the Administrator's response to the comments; and (2) A 
summary of the changes made to the rule since proposal. The document 
may be obtained from the U.S. EPA Library (MD-35), Research Triangle 
Park, North Carolina 27711, telephone (919) 541-2777; or from the 
National Technical Information Services, 5285 Port Royal Road, 
Springfield, Virginia 22151, telephone (703) 487-4650. Please refer to 
``Hazardous Air Pollutant Emissions from Process Units in the 
Thermoplastics Manufacturing Industry--Basis and Purpose Document for 
Final Standards, Summary of Public Comments and Responses'' [EPA-453/R-
96-001b; May 1996]. This document is also available for downloading 
from the Technology Transfer Network. The Technology Transfer Network 
is one of the EPA's electronic bulletin boards. The Technology Transfer 
Network provides information and technology exchange in various areas 
of air pollution control. The service is free except for the cost of a 
phone call. Dial (919) 541-5472 for up to a 14,400 bps modem. If more 
information on the Technology Transfer Network is needed, call the HELP 
line at (919) 541-5384.

Previous Background Documents

    The following is a listing of background documents pertaining to 
this rulemaking. The complete title,

[[Page 48209]]

EPA publication number, publication date, docket number, and the 
abbreviated descriptive title used to refer to the document throughout 
this notice are included.
    (1) Hazardous Air Pollutant Emissions from Process Units in the 
Thermoplastics Manufacturing Industry--Supplementary Information 
Document for Proposed Standards. EPA-453/R-95-003a. March 1995. Docket 
item A-92-45: II-A-9. Supplementary Information Document.
    (2) Hazardous Air Pollutant Emissions from Process Units in the 
Thermoplastics Manufacturing Industry--Basis and Purpose Document for 
Proposed Standards. EPA-453/R-95-004a. March 1995. Docket item A-92-45: 
II-A-10. Basis and Purpose Document for Proposed Standards.

Judicial Review

    National emission standards for organic HAP for Group IV polymers 
and resins were proposed in the Federal Register (FR) on March 29, 1995 
(60 FR 16090). This Federal Register action announces the EPA's final 
decision on the rule. Under section 307(b)(1) of the Act, judicial 
review of the final rule is available only by filing a petition for 
review in the U.S. Court of Appeals for the District of Columbia 
Circuit within 60 days of today's publication of this final rule. Under 
section 307(b)(2) of the Act, the requirements that are the subject of 
today's notice may not be challenged later in civil or criminal 
proceedings brought by the EPA to enforce these requirements.
    The following outline is provided to aid in reading the preamble to 
the final rule.

I. Background
II. Summary of Considerations Made in Developing These Standards
    A. Purpose of Standards
    B. Technical Basis of Regulation
    C. Stakeholder and Public Participation
III. Summary of Promulgated Standards
    A. Storage Vessel Provisions
    B. Process Vent Provisions
    C. Heat Exchange Provisions
    D. Process Contact Cooling Tower Provisions
    E. Wastewater Provisions
    F. Equipment Leak Provisions
    G. Emissions Averaging Provisions
    H. Compliance and Performance Test Provisions and Monitoring 
Requirements
    I. Recordkeeping and Reporting Provisions
IV. Summary of Impacts
V. Significant Comments and Changes to the Proposed Standards
    A. Applicability Provisions and Definitions
    B. Continuous Process Vent Provisions
    C. Batch Process Vent Provisions
    D. Wastewater Provisions
    E. Process Contact Cooling Tower Provisions
    F. Equipment Leak Provisions
    G. Emissions Averaging Provisions
    H. Compliance and Performance Test Provisions and Monitoring 
Requirements
    I. Recordkeeping and Reporting
VI. Administrative Requirements
    A. Docket
    B. Executive Order 12866
    C. Paperwork Reduction Act
    D. Regulatory Flexibility Act
    E. Unfunded Mandates

I. Background

    Section 112(b) of the Act lists 1989 HAP and directs the EPA to 
develop standards to control all major sources and some area sources 
emitting HAP. On July 16, 1992, the EPA published a list of major and 
area source categories for which NESHAP are to be promulgated (57 FR 
3156). Six of the seven source categories regulated by this rule were 
included on that list as major source categories. The other source 
category, nitrile resins production, has since been added to the source 
category list. On December 3, 1993, the EPA published a schedule for 
promulgating standards for the listed major and area source categories 
(58 FR 83941). Standards for these seven major source categories were 
proposed on March 29, 1995, under this rulemaking.

II. Summary of Considerations Made in Developing These Standards

A. Purpose of Standards

    The Act was created in part ``to protect and enhance the quality of 
the nation's air resources so as to promote the public health and 
welfare and the productive capacity of its population [the Act, section 
101(b)(1)]. Title I of the Act establishes a control technology-based 
program to reduce stationary source emissions of HAP. The goal of the 
section 112(d) Maximum Achievable Control Technology standards (MACT) 
is to apply such control technology to reduce emissions and thereby 
reduce the hazard of pollutants emitted from stationary sources.
    The Act strategy avoids dependence on a detailed and comprehensive 
risk assessment hampered by (but not limited to) the following caveats, 
as prerequisites for control of air toxics: (1) Some of the HAP emitted 
from stationary sources are unknown; and (2) Many of the HAP with 
emissions information have incomplete data in which to describe health 
hazard. In addition, these standards are not ``significant'' as defined 
by Executive Order 12866, and a specific benefits analysis is not 
required. Because of these issues, a detailed and intensive risk 
assessment of potential effects from the organic HAP emitted from 
stationary sources is not included in this rulemaking.
    The EPA does recognize that the degree of adverse effects to health 
resulting from the most significant emissions identified can range from 
mild to severe. The extent to which the effects could be experienced is 
dependent upon the ambient concentrations and exposure time. The latter 
is further influenced by source-specific characteristics such as 
emission rates and local meteorological conditions. Human variability 
factors also influence the degree to which effects to health occur: 
genetics, age, pre-existing health conditions, and lifestyle.
    The organic HAP listed in section 112(b)(1) of the Act emitted by 
the thermoplastic facilities covered by these standards include 
styrene, acrylonitrile, butadiene, ethylene glycol, methanol, 
acetaldehyde, and dioxane. Available emission date gathered, in 
conjunction with development of these MACT standards, show that these 
organic HAP are those which have the potential for reduction by the 
implementation of the standard.
    Some of the effects of the pollutants whose emissions are reduced 
by these standards include central nervous system effects (e.g., 
drowsiness, dizziness, headaches, impairment of vision, peripheral 
nervous system effects expressed as numbness of the extremities, 
fatigue, and coma and death at lethal levels), respiratory irritation 
expressed as labored breathing and impaired lung function, eye 
irritation, reproductive and developmental effects, gastrointestinal 
effects, blood effects (e.g., anemia and leukocytosis), and liver and 
kidney toxicity. In addition, butadiene exposure to humans has been 
associated with increased risk of cardiovascular disease and effects on 
the blood. In regard to carcinogenicity, some of the organic HAP 
controlled under these standards are either probable (i.e., 
acetaldehyde, dioxane, acrylonitrile, and butadiene) or possible (i.e., 
styrene) human carcinogens.
    These standards will result in a minimum organic HAP emission 
reduction of 3,550 Mg/yr for existing affected sources and 6,870 Mg/yr 
for new affected sources. The majority of the organic HAP regulated by 
these standards are also volatile organic compounds (VOC). In reducing 
emissions of organic HAP, emissions of VOC are also reduced. No other 
criteria pollutant ambient levels will be affected by these standards. 
The emission reductions achieved by these standards, when combined with 
the emission

[[Page 48210]]

reductions achieved by other standards mandated by the Act, will 
achieve the primary goal of the Clean Air Act.

B. Technical Basis of Regulation

    National emission standards for sources of HAP established under 
section 112(d) of the Act reflect MACT:

    * * * the maximum degree of reduction in emissions of the HAP * 
* * that the Administrator, taking into consideration the cost of 
achieving such emission reduction, and any nonair quality health and 
environmental impacts and energy requirements, determines is 
achievable for new or existing sources in the category or 
subcategory to which such emission standard applies * * * [42 U.S.C. 
Sec. 7412(d)(2)].

    The amended Clean Air Act contains requirements for the development 
of regulatory alternatives for sources of HAP emissions. The statute 
requires the standards to reflect the maximum degree of reduction in 
emissions of HAP that is achievable for new or existing sources. This 
control level is referred to as MACT. The amended Clean Air Act also 
provides guidance on determining the least stringent level allowed for 
a MACT standard; this level is termed the ``MACT floor.''
    For new sources, the standards for a source category or subcategory 
``shall not be less stringent than the emission control that is 
achieved in practice by the best controlled similar source, as 
determined by the Administrator'' [section 112(d)(3) of the Act]. 
Existing source standards shall be no less stringent than the average 
emission limitation achieved by the best performing 12 percent of the 
existing sources for source categories and subcategories with 30 or 
more sources or the average emission limitation achieved by the best 
performing 5 sources for source categories or subcategories with fewer 
than 30 sources [section 12(d)(3) of the Act]. These two minimum levels 
of control define the MACT floor for new and existing sources.
    Two interpretations have been evaluated by the EPA for representing 
the MACT floor for existing sources. One interpretation is that the 
MACT floor is represented by the 88th percentile source. The second 
interpretation is that the MACT floor is represented by the ``average 
emission limitation achieved'' by the best performing sources, where 
the ``average'' is based on a measure of central tendency, such as the 
arithmetic mean, median, or mode. This latter interpretation is 
referred to as the ``higher floor interpretation.'' In a June 6, 1994 
Federal Register notice [59 FR 29196], the EPA presented its 
interpretation of the statutory language concerning the MACT floor for 
existing sources. Based on a review of the statute, legislative 
history, and public comments, the EPA believes that the ``higher floor 
interpretation'' is a better reading of the statutory language. The 
determination of the MACT floor for existing sources under the proposed 
and final rule followed the ``higher floor interpretation.''
    The regulatory alternatives considered in the development of this 
rule, including those regulatory alternatives selected as standards for 
new and existing affected sources, are based on process and emissions 
data received from the existing plant sites known by the EPA to be in 
operation.
    Regulatory alternatives more stringent than the MACT floor were 
selected when they were judged to be reasonable ``taking into 
consideration the cost of achieving such emission reduction, and any 
nonair quality health and environmental impacts, and energy 
requirements'' (42 U.S.C. Sec. 7412(d)(2)).
    Potential regulatory alternatives were developed based on the 
Hazardous Organic NESHAP (HON) (i.e., subparts F, G, H, and I of 40 CFR 
part 63), the Polymer Manufacturing New Source Performance Standards 
(NSPS) (subpart DDD of 40 CFR part 60), and the Batch Processes 
Alternative Control Techniques (ACT) document [EPA 453/R-93-017; 
November 1993]. The HON was selected as a basis for regulatory 
alternatives because: (1) the characteristics of the emissions from 
storage vessels, continuous process vents, equipment leaks, and 
wastewater at Group IV thermoplastic facilities are similar or 
identical to those addressed by the HON; and (2) The levels of control 
required under the HON were already determined through extensive 
analyses to be reasonable from a cost and impact perspective.
    The Polymer Manufacturing NSPS, which covers certain process 
emissions at polystyrene and PET facilities using a continuous process, 
and cooling tower emissions at PET facilities, was selected for the 
same basic reasons as the HON. Although the Polymer Manufacturing NSPS 
was developed under section 111 of the Clean Air Act and was targeted 
to control VOC emissions, the requirements for setting standards under 
section 111 are very similar to the requirements under section 112 of 
the Clean Air Act Amendments of 1990, and all of the organic HAP 
identified from polystyrene and PET affected sources are also VOC.
    Finally, the Batch Processes ACT was selected to identify 
regulatory alternatives for batch process vents, which are not 
addressed by either the HON or Polymer Manufacturing NSPS. As with the 
Polymer Manufacturing NSPS, the Batch Processes ACT addresses the 
control of VOC emissions, and all of the organic HAP identified for the 
Group IV thermoplastics facilities are also VOC. Unlike the HON and 
Polymer Manufacturing NSPS, the Batch Processes ACT is not a regulation 
and, therefore, does not specify a level of control that must be met. 
Instead, the Batch Processes ACT provides information on emissions 
estimation techniques and potential levels of control and their 
environmental, energy, and cost impacts. Based on the review of the 
Batch Processes ACT, the EPA selected a level of control equivalent to 
90 percent reduction for batch process vents. This level of control was 
selected for regulatory analysis purposes.

C. Stakeholder and Public Participation

    In the development of these standards, numerous representatives of 
the thermoplastics industry were consulted. Industry representatives 
have included trade associations and thermoplastic producers responding 
to section 114 questionnaires and information collection requests 
(ICR). Representatives from other interested EPA offices, Regional 
offices, and State environmental agency personnel, participated in the 
regulatory development process as members of the Work Group. The Work 
Group is involved in the regulatory development process, and is given 
opportunities to review and comment on the standards before proposal 
and promulgation. Therefore, the EPA believes that the implication to 
order EPA offices and programs has been adequately considered during 
the development of these standards. In addition, the EPA has met with 
members of industry concerning these standards. Finally, industry 
representatives, regulatory authorities, and environmental groups had 
the opportunity to comment on the proposed standards and to provide 
additional information during the public comment period that followed 
the proposal.
    The standards were proposed in the Federal Register on March 29, 
1995 (60 FR 16090). The preamble to the proposed standards described 
the rationale for the proposed standards. Public comments were 
solicited at the time of proposal. To provide interested persons the 
opportunity for oral presentation of data, views, or arguments 
concerning the proposed standards, a public hearing was offered at 
proposal. However, the public did not request a hearing and, therefore, 
one

[[Page 48211]]

was not held. The public comment period was from March 29, 1995 to May 
30, 1995. Twenty-seven comment letters were received. Commenters 
included industry representatives and State agencies. The comments were 
carefully considered, and changes were made in the proposed standards 
when determined by the EPA to be appropriate. A detailed discussion of 
these comments and responses can be found in the Basis and Purpose 
Document for Final Standards (EPA-453/R-96-001b; May 1996), which is 
referenced in the ADDRESSES section of this preamble. The summary of 
comments and responses in the Basis and Purpose Document for the Final 
Standards (EPA-453/R-96-001b; May 1996) serves as the basis for the 
revisions that have been made to the standards between proposal and 
promulgation. Section V of this preamble discusses these major changes.

III. Summary of Promulgated Standards

    Emissions of specific organic HAP from the following types of 
emission points (i.e., emission source types) are being covered by the 
final standards: Storage vessels, continuous process vents, batch 
process vents, equipment leaks, wastewater operations, heat exchange 
systems, and some process contact cooling towers associated with the 
manufacture of PET. The organic HAP emitted and required to be 
controlled by these standards vary by subcategory. Each of the nineteen 
thermoplastic products constitutes a separate subcategory (i.e., 
affected source) that is regulated by these standards.
    The existing affected source is defined as each group of one or 
more TPPUs that manufacture the same thermoplastic product as their 
primary product, and (1) are located at a major source plant site, (2) 
are not exempt, and (3) are not part of a new affected source. This 
means that each plant site will have only one existing affected source 
in any given subcategory.
    New affected sources are created under various circumstances. If a 
plant site with an existing affected source producing thermoplastic A 
as its primary product constructs a new TPPU also producing 
thermoplastic A as its primary product, the new TPPU is a new affected 
source if the new TPPU has the potential to emit more than 10 tons per 
year of a single HAP or 25 tons per year of all HAP. In this situation, 
the plant site would have an existing affected source producing 
thermoplastic A and a new affected source producing thermoplastic A. 
Each subsequent new TPPU with potential HAP emissions above major 
source levels (i.e., 10/25 tons per year) would be a separate new 
affected source. New affected sources are also created when a TPPU is 
constructed at a major source plant site where the thermoplastic 
product was not previously produced, with no regard to the potential 
HAP emissions from the TPPU. This approach to defining new affected 
source was selected in order to make this subpart more consistent with 
the HON.
    Another instance where a new affected source is created is if a new 
TPPU is constructed at a new plant site (i.e., green field site) that 
will be a major source. The final manner in which a new affected source 
is created is when an existing affected source undergoes 
reconstruction, thus making the previously existing affected source 
subject to new source standards.
    This standard differs from the HON, however, in that it applies to 
multiple source categories. Thus, unlike the HON, a newly added TPPU at 
a facility is covered by this rule even if that TPPU is in a different 
source category from the existing TPPUs at the facility. It is the 
EPA's position that the addition of a process unit in a different 
source category is a new source and must meet the requirements for new 
sources even though the TPPU has the potential to emit less than 10 
tons per year of a single HAP or 25 tons per year of all HAP. Indeed, 
if a source covered by another MACT standard (i.e., a different source 
category) were built at a HON facility, that source would be subject to 
new source requirements under that MACT standard.
    Also, each affected source includes the following emission points 
and equipment that are associated with each group of TPPU: (1) Each 
wastewater stream; (2) each wastewater operation; (3) each heat 
exchange system; (4) each process contact cooling tower used in the 
manufacture of PET that is associated with a new affected source; and 
(5) each process contact cooling tower used in the manufacture of PET 
using a continuous terephthalic acid high viscosity multiple end 
finisher process that is associated with an existing affected source.
    With relatively few exceptions, the final standards for storage 
vessels, continuous process vents, equipment leaks, wastewater streams, 
and heat exchange systems are the same as those promulgated for the 
corresponding types of emission points at facilities subject to the 
HON. As shown in Tables 1 and 2, some subcategories have requirements 
that differ from the HON; these cases are designated by ``MACT Floor.'' 
These different requirements are specified in the final standards.
    As in the HON, if an emission point within an affected source meets 
the applicability criteria and is required to be controlled under the 
standards, it is referred to as a Group 1 emission point. If an 
emission point within the affected source is not required to apply 
controls, it is referred to as a Group 2 emission point.

 Table 1.-- Summary of Final Standards for Existing Affected Sources in Relationship to the HON, the Polymer Manufacturing NSPS, and the Batch Processes
                                                                           Act                                                                          
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                   Type of emission point                                               
                                  ----------------------------------------------------------------------------------------------------------------------
           Subcategory                                                                                                                  Heat exchange   
                                     Storage  vessels             Process vents              Equipment leaks         Wastewater            systems      
--------------------------------------------------------------------------------------------------------------------------------------------------------
ABS, continuous emulsion.........  HON................  HON..............................  HON................  HON................  HON.               
ABS, continuous mass.............  HON................  Continous process vents: HON       HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or complaint flare.                                                                  
ABS, batch emulsion..............  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
ABS, batch suspension............  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
ABS, latex.......................  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  

[[Page 48212]]

                                                                                                                                                        
MABS.............................  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
MBS..............................  HON................  Continuous process vents: MACT     HON................  HON................  HON.               
                                                         floor batch process vents: 90                                                                  
                                                         percent reduction or compliant                                                                 
                                                         flare.                                                                                         
SAN, continuous..................  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
SAN, batch.......................  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
ASA/AMSAN........................  MACT floor.........  MACT floor.......................  HON................  No control.........  HON.               
Polystyrene, continuous..........  MACT floor.........  Continuous process vents from      HON................  HON................  HON.               
                                                         material recovery sections: same                                                               
                                                         as polymer manufacturing NSPS                                                                  
                                                         other continuous process vents:                                                                
                                                         HON batch process vents: 90                                                                    
                                                         percent reduction or compliant                                                                 
                                                         flare.                                                                                         
Polystyrene, batch...............  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
Expandable polystyrene...........  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
PET-TPA, continuous..............  HON................  Continuous process vents from raw  HON................  HON................  HON.               
                                                         material preparation and                                                                       
                                                         polymerization reaction                                                                        
                                                         sections: same as polymer                                                                      
                                                         manufacturing NSPS other                                                                       
                                                         continuous process vents: HON                                                                  
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
PET-TPA continuous high viscosity  HON................  Continuous process vents from raw  No control.........  HON................  HON.               
 multiple end finisher.                                  material preparation and                                                                       
                                                         polymerization reaction                                                                        
                                                         sections: same as polymer                                                                      
                                                         manufacturing NSPS other                                                                       
                                                         continuous process vents: HON                                                                  
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
PET-TPA, batch-DMT, batch........  HON................  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
PET-DMT, continuous..............  HON................  Continuous process vents from      HON................  HON................  HON.               
                                                         material recovery and                                                                          
                                                         polymerization reaction                                                                        
                                                         sections: same as polymer                                                                      
                                                         manufacturing NSPS other                                                                       
                                                         continuous process vents: HON                                                                  
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
Nitrile..........................  MACT floor.........  Continuous process vents: HON      HON................  HON................  HON.               
                                                         batch process vents: 90 percent                                                                
                                                         reduction or compliant flare.                                                                  
--------------------------------------------------------------------------------------------------------------------------------------------------------
ASA/AMSAN = acrylonitrile styrene acrylate resin/alpha methyl styrene acrylonitrile resin.                                                              
TPA = terephthalic acid.                                                                                                                                
DMT = dimethyl terephthalate.                                                                                                                           


 Table. 2.--Summary of Final Standards for New Affected Sources in Relationship to the HON, the Polymer Manufacturing NSPS, and the Batch Processes Act 
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                   Type of emission point                                               
                                   ---------------------------------------------------------------------------------------------------------------------
            Subcategory                 Storage                             Equipment                   Heat exchange                                   
                                        vessels         Process vents         leaks        Wastewater      systems       Process contact cooling towers 
--------------------------------------------------------------------------------------------------------------------------------------------------------
ABS, continuous emulsion..........  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
ABS, continuous mass..............  Regulatory      Continuous process    HON..........  HON..........  HON..........  NA.                              
                                     alternative 2   vents: HON batch                                                                                   
                                     \1\.            process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
ABS, batch emulsion...............  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
ABS, batch suspension.............  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             

[[Page 48213]]

                                                                                                                                                        
ABS, Latex........................  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
MABS..............................  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
MBS...............................  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
SAN, continuous...................  MACT floor....  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
SAN, batch........................  HON...........  MACT floor..........  HON..........  No control...  HON..........  NA.                              
ASA/AMSAN.........................  MACT floor....  MACT floor..........  HON..........  No control...  HON..........  NA.                              
Polystyrene, continuous...........  MACT floor....  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents from material                                                                                
                                                     recovery sections:                                                                                 
                                                     same as polymer                                                                                    
                                                     manufacturing NSPS,                                                                                
                                                     other continuous                                                                                   
                                                     process vents: HON                                                                                 
                                                     batch process                                                                                      
                                                     vents: 90 percent                                                                                  
                                                     reduction or a                                                                                     
                                                     compliant flare.                                                                                   
Polystyrene, batch................  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
Expandable polystyrene............  HON...........  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
PET-TPA, continuous...............  HON...........  Continuous process    HON..........  HON..........  HON..........  No contact condenser effluent    
                                                     vents from raw                                                     associated with a vacuum system 
                                                     material                                                           shall go to a process contact   
                                                     preparation and                                                    cooling tower.                  
                                                     polymerization                                                                                     
                                                     reaction sections:                                                                                 
                                                     same as Polymer                                                                                    
                                                     Manufacturing NSPS                                                                                 
                                                     other continuous                                                                                   
                                                     process vents: HON                                                                                 
                                                     batch process                                                                                      
                                                     vents: 90 percent                                                                                  
                                                     reduction or a                                                                                     
                                                     compliant flare.                                                                                   
PET-TPA, continuous multiple end    HON...........  Continuous process    No control...  HON..........  HON..........  No contact condenser effluent    
 finisher.                                           vents from raw                                                     associated with a vacuum system 
                                                     material                                                           shall go to a process contact   
                                                     preparation and                                                    cooling tower.                  
                                                     polymerization                                                                                     
                                                     reaction sections:                                                                                 
                                                     same as Polymer                                                                                    
                                                     Manufacturing NSPS                                                                                 
                                                     other continuous                                                                                   
                                                     process vents: HON                                                                                 
                                                     batch process                                                                                      
                                                     vents: 90 percent                                                                                  
                                                     reduction or a                                                                                     
                                                     compliant flare.                                                                                   
PET-TPA, batch....................  HON...........  Continuous process    HON..........  HON..........  HON..........  No contact condenser effluent    
-DMT, batch.......................                   vents: HON batch                                                   associated with a vacuum system 
                                                     process vents: 90                                                  shall go to a process contact   
                                                     percent reduction                                                  cooling tower.                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             

[[Page 48214]]

                                                                                                                                                        
PET-DMT, continuous...............  HON...........  Continuous process    HON..........  HON..........  HON..........  No contact condenser effluent    
                                                     vents from material                                                associated with a vacuum system 
                                                     recovery and                                                       shall go to a process contact   
                                                     polymerization                                                     cooling tower.                  
                                                     reaction sections:                                                                                 
                                                     same as polymer                                                                                    
                                                     manufacturing NSPS                                                                                 
                                                     other continuous                                                                                   
                                                     process vents: HON                                                                                 
                                                     batch process                                                                                      
                                                     vents: 90 percent                                                                                  
                                                     reduction or a                                                                                     
                                                     compliant flare.                                                                                   
Nitrile...........................  MACT floor....  Continuous process    HON..........  HON..........  HON..........  NA.                              
                                                     vents: HON batch                                                                                   
                                                     process vents: 90                                                                                  
                                                     percent reduction                                                                                  
                                                     or a compliant                                                                                     
                                                     flare.                                                                                             
--------------------------------------------------------------------------------------------------------------------------------------------------------
\1\ The final standard is stringent than the MACT floor, which is more stringent than the HON.                                                          
NA = Not applicable, not part of affected source.                                                                                                       
ASA/AMSAN = acrylonitrile styrene acrylate resin/alpha methyl styrene acrylonitrile resin.                                                              
TPA = terephthalic acid.                                                                                                                                
DMT = dimethyl terephthalate.                                                                                                                           

A. Storage Vessel Provisions

    The standards require owners and operators to first determine 
whether or not a storage vessel is required to be controlled. For those 
storage vessels determined to require control, the standards specify 
the appropriate level of control.
    For most existing and new storage vessels, the criteria for 
determining which storage vessels must be controlled are identical to 
the criteria in the HON storage vessel provisions and are based on 
storage vessel capacity and vapor pressure of the stored material. 
Typically, applicability criteria are different for existing and new 
affected sources.
    For most storage vessels, the level of control required is either 
technical modification to the tank (e.g., the installation of an 
internal floating roof) or the use of a closed vent system and control 
device that is generally required to achieve at least 95 percent 
emission reduction.

    Note: This is the same level of control as required under the 
HON.

    As shown in Tables 1 and 2, some subcategories also have 
requirements that differ from the HON. These requirements are specified 
in the final standards. For those subcategories not applying the HON 
level of control, the level of control varies depending on the 
subcategory. For example, the standards may require 90 or 98 percent 
emission reduction, as opposed to the 95 percent emission reduction 
required by the HON. Finally, to simplify the final rule, some 
chemicals with extremely low vapor pressure (e.g., ethylene glycol) 
have been exempted from the storage vessel provisions.

B. Process Vent Provisions

    Similar to the standards for storage vessels, the standards for 
process vents require owners and operators to first determine whether 
or not a process vent, or set of process vents, requires control and, 
if so, then specifies the level of control required. The standards 
regulate both continuous and batch process vents.
    Except for certain PET and polystyrene continuous process vents, 
the group status of a continuous process vent is determined by 
comparing the total resource effectiveness (TRE) value for each 
continuous process vent to a TRE value. The TRE value is a reflection 
of the cost effectiveness of controlling an individual continuous 
process vent. There are different TRE coefficients for continuous 
process vents depending on whether the affected source is new or 
existing. The TRE equations for new and existing continuous process 
vents differ because the standards for new affected sources are more 
stringent than the standards for existing affected sources. With one 
exception, continuous process vents with TRE values of 1.0 or less are 
Group 1 continuous process vents. For continuous process vents at 
existing MBS facilities, the TRE value for each continuous process vent 
is compared to a TRE value of 3.7. The proposed and final standards 
refer to the procedures in the HON for determination of the TRE value.
    For continuous process vents associated with the material recovery 
section from existing PET affected sources using a continuous dimethyl 
terephthalate (DMT) process, the set of continuous process vents are 
designated as Group 1 continuous process vents if the combined 
uncontrolled emission rate is greater than the threshold emission rate. 
For other sets of continuous process vents associated with the raw 
material preparation section or polymerization reaction section at 
existing and new polystyrene and PET facilities, there are no 
applicability criteria. These sets of continuous process vents are 
considered to be Group 1 and must meet the specified emission limits. 
Continuous process vents associated with the material recovery section 
at new PET affected sources using a continuous DMT process are also 
designated as Group 1 and must meet the specified emission limits.
    The group determination procedure for batch process vents differs 
from the procedure used for continuous process vents. First, the 
estimated annual emissions for an individual batch process vent are 
entered into the flow rate regression equation and a calculated flow 
rate is determined. Second, the actual flow rate for the batch process 
vent is compared to the calculated flow rate. If the actual flow rate 
is less than the calculated flow rate, then the batch process vent is 
designated as Group 1 and control is required. The batch process vent 
group determination procedure is the same for existing and new batch 
process vents.

[[Page 48215]]

    There are exceptions to the procedures described above. For new SAN 
affected sources using a batch process, the standards require an 
overall emission reduction of 84 percent from all process vents (i.e., 
continuous and batch process vents), and a group determination is not 
required. For new and existing acrylonitrile styrene acrylate resin/
alpha methyl styrene acrylonitrile resin (ASA/AMSAN) affected sources, 
the standards require that emissions from all process vents (i.e., 
continuous and batch process vents) be controlled by 98 percent, and a 
group determination is not required.
    Another exception concerns a batch process vent that is combined 
with a continuous process vent prior to a control or recovery device. 
Said batch process vent is not required to comply with the batch 
process vent provisions if there are no emissions to the atmosphere up 
until the point the batch process vent is combined with the continuous 
process vent. The combined vent stream would be required to comply with 
the continuous process vent provisions. The presence of a batch process 
vent in a continuous process vent emission stream would necessitate 
that all applicability tests and performance tests be conducted while 
the batch process vent is emitting (i.e., maximum operating conditions 
for the combined vent stream).
    The level of control required for most continuous process vents is 
the same as the level of control required by the HON: 98 percent 
emission reduction or an organic HAP concentration limit of 20 ppmv. If 
a flare is used, it must meet the design and operating requirements of 
Sec. 63.11(b) of subpart A of 40 CFR part 63. Exceptions to this level 
of control are described in the following paragraphs.
    For continuous process vents associated with material recovery 
sections at polystyrene affected sources using a continuous process, 
raw material preparation sections and polymerization reaction sections 
at PET affected sources using a continuous terephthalic acid (TPA) 
process, and material recovery sections and polymerization reaction 
sections at PET affected sources using a continuous DMT process, the 
standards require continuous process vents associated with these 
process sections to meet emission limits expressed as kilogram organic 
HAP per megagram of product. Depending on the process section, the 
standards provide several compliance options including limiting the 
outlet gas temperature from each final condenser or reducing emissions 
from each process section by 98 weight percent or to an organic HAP 
concentration limit of 20 ppmv. These are the same control requirements 
as specified in the Polymer Manufacturing NSPS, which serve as the 
basis for these specific provisions.
    For batch process vents, the standards require Group 1 batch 
process vents to achieve emission reductions of 90 percent or greater 
for the batch cycle.
    There are three subcategories where the standards are based on the 
MACT floor. These subcategories are existing MBS affected sources, 
existing and new ASA/AMSAN affected sources, and new SAN affected 
sources using a batch process. As described earlier, the applicability 
criteria and level of control differ from the HON for all three 
subcategories.
    For existing MBS affected sources, the standards require continuous 
process vents at affected sources to either: (1) meet an emission limit 
of 0.000590 kilogram of emissions per megagram of product for all 
continuous process vents associated with the affected source; or (2) 
control emissions from continuous process vents with a TRE of 3.7 or 
less by 98 percent. The development of the MACT floor level of control 
and applicability criteria for MBS existing affected sources is 
documented in Docket Item II-B-21 of A-92-45 and in the Supplementary 
Information Document (SID) for Proposed Standards [EPA-453/R-95-003a; 
March 1995].
    For both existing and new ASA/AMSAN affected sources, the standards 
require all continuous and batch process vents to achieve emission 
reductions of 98 percent.
    For new SAN affected sources using a batch process, the standards 
require an overall emission reduction of 84 percent for all process 
vent emissions.

C. Heat Exchange Provisions

    The standards apply to each heat exchange system that is associated 
with the affected source. The standards require a monitoring program to 
detect leakage of organic HAP from the process into the cooling water. 
The standards refer to the monitoring program in the HON.

D. Process Contact Cooling Tower Provisions

    The standards require that owners or operators of new affected 
sources manufacturing PET not send contact condenser effluent 
associated with a vacuum system to a process contact cooling tower. For 
existing PET affected sources using a continuous TPA high viscosity 
multiple end finisher process, the owner or operator is required to 
keep the concentration of ethylene glycol in the process contact 
cooling tower water to 4 percent or less by weight provided the TPPU is 
or has become subject to 40 CFR part 60, subpart DDD. Process contact 
cooling towers at existing PET affected sources using other processes 
(e.g., DMT process) are not regulated.

    Note: The standards treat the contact condenser effluent at 
existing affected sources as wastewater.

E. Wastewater Provisions

    Except for ASA/AMSAN affected sources, the standards require owners 
and operators to comply with the wastewater provisions in the HON. 
Owners and operators are required to make a group determination for 
each wastewater stream based on the applicability criteria in the HON: 
flow rate and organic HAP concentration. The level of control required 
for Group 1 wastewater streams is dependent upon the organic HAP 
constituents in the wastewater stream. The standards do not require 
control of wastewater emissions from existing or new ASA/AMSAN affected 
sources.
    The standards also require owners and operators to comply with the 
maintenance wastewater requirements in Sec. 63.105 of subpart F of this 
part. These provisions require owners and operators to include a 
description of procedures for managing wastewaters generated during 
maintenance in their start-up, shutdown, and malfunction plan.

F. Equipment Leak Provisions

    Except for one subcategory, both existing and new affected sources 
are required to comply with the equipment leak standards specified in 
subpart H of 40 CFR part 63. For PET affected sources using a 
continuous TPA high viscosity multiple end finisher process, the final 
rule does not require an equipment leak program. The final rule also 
exempts from the equipment leak standards any PET TPPU in which all of 
the components are either in vacuum service or in heavy liquid service.
    In general, subpart H requires owners and operators to implement a 
leak detection and repair (LDAR) program, including various work 
practice and equipment standards. The subpart H standards are 
applicable to equipment in volatile HAP service for 300 or more hours 
per year (hr/yr). The standards define ``in volatile HAP service'' as 
being in contact with or containing process fluid that contains a total 
of 5 percent or more total HAP. Equipment subject to the standards are: 
valves, pumps, compressors, connectors, pressure relief devices, open-
ended

[[Page 48216]]

valves or lines, sampling connection systems, instrumentation systems, 
agitators, and closed-vent systems and control devices.
    A few differences to the subpart H standards are contained in the 
final rule. These differences include: exempting indications of liquids 
dripping from bleed ports on pumps and agitators at facilities 
producing polystyrene resins from the definition of a leak; not 
requiring the submittal of an Initial Notification; and allowing 150 
days, rather than 90 days, to submit the Notification of Compliance 
Status. In addition, PET facilities are not required to provide a list 
of identification numbers for components in heavy liquid service, 
pressure relief devices in liquid service, and instrumentation systems. 
The final rule also clarifies that for these components the presence of 
a leak is to be determined exclusively through the use of visual, 
audible, olfactory, or any other detection methods, but that Method 21 
is not to be used. Finally, bottoms receivers and surge control vessels 
are not regulated under the equipment leak provisions, but instead are 
regulated as storage vessels.
    Affected sources subject to this rule currently complying with the 
NESHAP for Certain Processes Subject to the Negotiated Regulation for 
Equipment Leaks [40 CFR part 63, subpart I] or with the equipment leak 
provisions in Sec. 60.562-2 of 40 CFR part 60, subpart DDD, are 
required to continue to comply with subpart I or subpart DDD, as 
applicable, until the compliance date of the final rule, at which point 
in time they must comply with this rule and are no longer subject to 
subpart I and subpart DDD. Further, affected sources complying with 
subpart I through a quality improvement program are allowed to continue 
these programs without interruption as part of complying with this 
rule. In other words, becoming subject to this rule does not restart or 
reset the ``compliance clock'' as it relates to reduced burden earned 
through a quality improvement program.

 G. Emissions Averaging Provisions

    The EPA is allowing emissions averaging among continuous process 
vents, batch process vents, aggregate batch vent streams, storage 
vessels, and wastewater streams, within an existing affected source. 
New affected sources are not allowed to use emissions averaging. 
Emissions averaging is not allowed between subcategories; it is only 
allowed between emission points within the same affected source. Under 
emissions averaging, a system of ``credits'' and ``debits'' is used to 
determine whether an affected source is achieving the required emission 
reductions. Twenty emission points per plant site are allowed in the 
emissions averaging plan submitted for the plant site, with an 
additional 5 emission points allowed if pollution prevention measures 
are used.

H. Compliance and Performance Test Provisions and Monitoring 
Requirements

    Compliance and performance test provisions and monitoring 
requirements contained in the standards are very similar to those found 
in the HON. Each type of emission point included in the standards is 
discussed briefly in the following paragraphs. Significant differences 
from the continuous parameter monitoring requirements found in the HON 
are discussed in Section 8.
1. Storage Vessels
    Monitoring and compliance provisions for storage vessel 
improvements include periodic visual inspections of vessels, roof 
seals, and fittings, as well as internal inspections. If a control 
device is used, the owner or operator must identify the appropriate 
monitoring procedures to be followed in order to demonstrate 
compliance. Monitoring parameters and procedures for many of the 
control devices likely to be used are identified in the standards. 
Reports and records of inspections, repairs, and other information 
necessary to determine compliance are also required by the standards.
2. Continuous Process Vents
    The standards for continuous process vents require the owner or 
operator to either calculate a TRE index value to determine the group 
status of each continuous process vent or to comply with the control 
requirements. The TRE index value is determined after the last recovery 
device in the process or prior to venting to the atmosphere. The TRE 
calculation involves an emissions test or engineering assessment and 
use of the TRE equations specified in the standards.
    Performance test provisions are included for Group 1 continuous 
process vents to verify that control or recovery devices achieve the 
required performance. Monitoring provisions necessary to demonstrate 
compliance are also included in the standards.
    Compliance provisions for continuous process vents at polystyrene 
and PET affected sources are included in the standards. For owners or 
operators electing to comply with a kilogram organic HAP per megagram 
of product emission limit, procedures to demonstrate compliance are 
provided.
3. Batch Process Vents
    Similar to the provisions for continuous process vents, there is a 
procedure for determining the group status of batch process vents. This 
procedure is based on annual emissions and annual average flow rate of 
the batch process vent. Equations for estimating and procedures for 
measuring annual emissions and annual average flow rates are provided 
in the standards. The use of engineering assessment is also allowed 
under certain circumstances.
    Performance test provisions are included for Group 1 batch process 
vents to verify that control devices achieve the required performance. 
Monitoring provisions necessary to demonstrate compliance are also 
included in the standard.
    For Group 2 batch process vents, the standard requires owners and 
operators to establish a batch cycle limitation. The batch cycle 
limitation restricts the number and type of batch cycles that can be 
accomplished per year. This enforceable limitation ensures that a Group 
2 batch process vent does not become a Group 1 batch process vent as a 
result of running more batch cycles than anticipated when the group 
determination was made. The determination of the batch cycle limitation 
is not tied to any previous production amounts. As affected source may 
set the batch cycle limitation at any level it desires as long as the 
batch process vent remains a Group 2 batch process vent. Alternatively, 
an owner or operator may declare any Group 2 batch process vent to be a 
Group 1 batch process vent. In such cases, control of the batch process 
vent is required.
    Procedures are included in the standards to demonstrate compliance 
with the requirement to reduce overall process vent emissions (i.e., 
continuous and batch process vents) by 84 percent for new SAN affected 
sources using a batch process.
4. Heat Exchange Systems
    Monitoring of cooling water is required to detect leaks in heat 
exchange systems. If a leak is detected, the heat exchange system must 
be repaired.
5. Process Contact Cooling Towers
    Owners and operators of new affected sources manufacturing PET are 
prohibited from sending contact condenser effluent associated with a 
vacuum system to a process contact

[[Page 48217]]

cooling tower. Owners and operators of existing PET affected sources 
using a TPA continuous high viscosity multiple end finisher process are 
required to monitor ethylene glycol concentration in the cooling tower 
water and to ensure that the levels do not exceed 4 percent by weight. 
Procedures for sampling cooling tower water and measuring the ethylene 
glycol concentration are included in the standards.
6. Wastewater
    For demonstrating compliance with the various requirements, the 
standards allow the owners or operators to either conduct performance 
tests or to document compliance using engineering calculations. 
Appropriate compliance and monitoring provisions are included in the 
standards.
7. Equipment Leaks
    Except for certain components at PET affected sources, the final 
rule retains the use of Method 21 to detect leaks. Method 21 requires a 
portable organic vapor analyzer to monitor for leaks from equipment in 
use. A ``leak'' is a concentration specified in the regulation for the 
type of equipment being monitored and is based on the instrument 
response to methane (i.e., the calibration gas) in air. The rule allows 
the use of engineering assessment to determine that equipment is not in 
organic HAP service. If there is disagreement between an owner or 
operator and the Administrator, the rule specifies that Method 18 or 
Method 25A be used to determine the organic HAP or total organic 
compounds (TOC) content of a process stream. To test for leaks in a 
batch system, test procedures using either a gas or a liquid for 
pressure testing the batch system are specified.
8. Continuous Parameter Monitoring
    The final standards require owners or operators to establish 
parameter monitoring levels. The standards provide the owner or 
operator the flexibility to establish the levels based on site-specific 
information. Site-specific levels can best accommodate variation in 
emission point characteristics and control device designs. Three 
procedures for establishing these levels are provided in the final 
standards. They are based on performance tests; performance tests, 
engineering assessments, and/or manufacturer's recommendations; and 
engineering assessments and/or manufacturer's recommendations. While 
the establishment of a level based solely on performance tests is 
preapproved by the Administrator, values determined using the last two 
procedures, which may or may not use the results of performance tests, 
must be approved by the Administrator for each individual case.
    The final standards require the availability of at least 75 percent 
of monitoring data to constitute a valid days worth of data for 
continuous and batch process vents. Failure to have a valid day's worth 
of monitoring data is considered an excursion. The criteria for 
determining a valid day's or hour's worth of data are provided in the 
standards.
    A certain number of excused excursions have been allowed in the 
final standards; these provisions are the same as the provisions in the 
HON. The standards allow a maximum of 6 excused excursions for the 
first semiannual reporting period, decreasing by 1 excursion each 
semiannual reporting period. Starting with the sixth semiannual 
reporting period (i.e., the end of the third year of compliance) and 
thereafter, one excused excursion is allowed each semiannual reporting 
period. As is always the case, a State has the discretion to impose 
more stringent requirements than the requirements of NESHAP and other 
federal requirements and could choose not to allow the excused 
excursion provisions contained in these standards.

I. Recordkeeping and Reporting Provisions

    The standards require owners or operators of affected sources to 
maintain required records and reports for a period of at least 5 years. 
The final standards require that the following reports be submitted, as 
applicable: (1) Precompliance Report, (2) Emissions Averaging Plan, (3) 
Notification of Compliance Status, (4) Periodic Reports, and (5) other 
reports (e.g., notifications of storage vessel internal inspections).
    Specific recordkeeping and reporting requirements are specified in 
each section that addresses an individual emission point (e.g., 63.1321 
for batch process vents). The recordkeeping and reporting provisions 
related to the affected source as a whole (e.g., Notification of 
Compliance Status) are found in Sec. 63.1335. Requirements found in an 
individual emission point section and the requirements in Sec. 63.1335 
are complementary. For example, Sec. 63.1326 requires an owner or 
operator to record the batch cycle limitation for each Group 2 batch 
process vent. Sec. 63.1327 goes on to require the owner or operator to 
submit this information in the Notification of Compliance Status, as 
specified in Sec. 63.1335. Finally, Sec. 63.1335 requires submittal of 
the information specified in Sec. 63.1327.

IV. Summary of Impacts

    This section presents impacts resulting from the control of organic 
HAP emissions under these standards. Because many organic HAP are also 
VOC, a reduction in VOC emissions will also result from controls 
imposed by the standards. The standards are estimated to reduce organic 
HAP emissions from all existing affected sources by 3,520 Mg/yr from a 
baseline level of 18,120 Mg/yr. For new affected sources, the standards 
are estimated to reduce organic HAP emissions by 6,870 Mg/yr from a 
baseline level of 11,610 Mg/yr. At baseline, the EPA found that many 
affected sources already had some controls in place. These standards 
generally achieve an emission reduction by meeting the MACT floor level 
of control. [Note: Costs and other impacts are not considered when the 
selected standard is based on the MACT floor.] In some cases, these 
standards achieve additional emission reduction, beyond the floor, that 
was determined to be cost effective.
    Under the final standards, energy use is expected to increase by 
approximately 29,800 barrels of oil per year for existing affected 
sources and 43,600 barrels of oil per year for new affected sources. 
The emissions of secondary air pollutants associated with this energy 
increase are 70 Mg/yr for existing affected sources and 80 Mg/yr for 
new affected sources. At the same time, energy credits attributable to 
the prevention of organic HAP emissions from equipment leaks are 
approximately 7,000 barrels of oil per year for existing affected 
sources and 3,800 barrels of oil per year for new affected sources. 
This results in a net increase in energy usage equivalent to 
approximately 22,500 barrels of oil per year for existing affected 
sources and 39,700 barrels of oil per year for new affected sources.
    These figures are related to the control of process vents, 
wastewater operations, and equipment leaks. Energy impacts related to 
storage vessels were not estimated because many storage vessels would 
be controlled through the use of internal floating roofs which do not 
have any associated energy impacts. Data are not available for the EPA 
to estimate energy impacts for the elimination of emissions from 
process contact cooling towers for new PET affected sources or the 
control of ethylene glycol concentration in the process contact cooling 
tower water for existing PET affected sources using a continuous TPA 
high viscosity multiple end finisher process.

[[Page 48218]]

    Cost impacts include the capital costs of new control equipment, 
the cost of energy (i.e., supplemental fuel, steam, and electricity) 
required to operate control equipment, operation and maintenance costs, 
and the cost savings generated by reducing the loss of valuable product 
in the form of emissions. Also, cost impacts include the costs of 
monitoring, recordkeeping, and reporting associated with the standards.
    Under the standards, it is estimated that total capital costs for 
existing affected sources would be $10.7 million (1989 dollars), and 
total annual costs would be $3.3 million (1989 dollars) per year. Total 
capital costs for new affected sources would be $6.5 million (1989 
dollars), and total annual costs would generate a savings of $5.2 
million (1989 dollars) per year. It is expected that the actual 
compliance cost impacts of the standard would be less than presented 
because of the potential to use common control devices, upgrade 
existing control devices, use other less expensive control 
technologies, implement pollution prevention technologies, or use 
emissions averaging. Because the effect of such practices is highly 
site-specific and data were unavailable to estimate how often the lower 
cost compliance practices would be utilized, it is not possible to 
quantify the amount by which actual compliance costs would be reduced.
    The economic impact analysis for the selected regulatory 
alternatives at proposal showed that the estimated price increases for 
the affected chemicals ranged from 0.1 percent for nitrile to 2.8 
percent for SAN. Estimated decreases in output ranged from 0.1 percent 
for polystyrene to 4.6 percent for SAN. Net annual exports (i.e., 
exports minus imports) were predicted to decrease by an average of 2.5 
percent. These impacts were judged, at proposal, to be acceptable. 
Because estimated costs of the final standards have decreased, the 
economic impacts determined at proposal will decrease as well. 
Therefore, the EPA finds the economic impacts associated with the final 
standards are less than at proposal and are judged to be acceptable.

V. Significant Comments and Changes to the Proposed Standards

    In response to comments received on the proposed standards, changes 
have been made to the final standards. While several of these changes 
are clarifications designed to make the EPA's intent clearer, a number 
of them are significant changes to the requirements of the proposed 
standards. A summary of the substantive comments and/or changes made 
since the proposal are described in the following sections. The 
rationale for these changes and detailed responses to public comments 
are included in the Basis and Purpose Document for the Final Standards 
[EPA-453/R-96-001b; May 1996]. Additional information on the final 
standards is contained in the docket for this rulemaking (see ADDRESSES 
section of this preamble).

A. Applicability Provisions and Definitions

1. Designation of Affected Source and the Definition of TPPU
    Commenters expressed confusion about the definitions of ``affected 
source'' and ``TPPU'' in the proposed standards. The EPA reviewed both 
definitions and agreed that they needed clarification. In response, the 
EPA has revised the language describing ``affected source'' and 
``TPPU'' for the final standards.
    The definition of ``affected source'' included in Sec. 63.502 of 
the proposed standards was revised and the definition now references 
Sec. 63.1310(a) of the final rule, and Sec. 63.1310(a) describes the 
affected source. The provisions in Sec. 63.1310(a), which at proposal 
were in Sec. 63.500(a) and defined applicability in terms of the 
existence of one or more TPPUs, have been revised to define 
applicability in terms of the affected source. As part of this 
revision, the provisions in proposed Sec. 63.500(b), which described 
the affected source, were removed. [Note: In the proposed standards, 
the definition of TPPU attempted to describe all the equipment and 
operations that would be included in an affected source. In the final 
standards, the description of what the affected source includes is 
contained in Sec. 63.1310(a).]
    As discussed in section II, an existing affected source is defined 
as each group of one or more TPPUs that manufacture the same 
thermoplastic product as their primary product, and (1) are located at 
a major source plant site, (2) are not exempt, and (3) are not part of 
a new affected source. A new affected source can be a single TPPU 
located at major source plant site or a group of TPPUs that manufacture 
the same thermoplastic product as their primary product at a major 
source plant site. The situations when a new affected source are 
created are discussed under A.3 of this section.
    The affected source also includes the following emission points and 
equipment that are associated with each group of TPPU: (1) each 
wastewater stream; (2) each wastewater operation; (3) each heat 
exchange system; (4) each process contact cooling tower used in the 
manufacture of PET that is associated with a new affected source; and 
(5) each process contact cooling tower used in the manufacture of PET 
using a continuous terephthalic acid high viscosity multiple end 
finisher process that is associated with an existing affected source.
    For the final standards, the number of existing affected sources 
present at a plant site will equal the number of thermoplastic products 
manufactured at that plant site. A plant site manufacturing 3 different 
thermoplastic products has 3 existing affected sources.

    Note: Each different thermoplastic product represents a 
different subcategory, and each subcategory comprises a separate 
existing affected source.

    The number of existing affected sources at a plant site could range 
from 1 to 19.
    The definition of TPPU was revised and now includes a list of the 
collection of equipment that comprises a TPPU. This equipment includes 
process vents from process vessels, storage vessels, and equipment 
subject to the equipment leaks provisions. Because wastewater streams, 
wastewater operations, heat exchange systems, and process contact 
cooling towers are equipment that are often used by more than one TPPU, 
these items are not included as part of the definition of TPPU. 
Instead, said items are included in the definition of affected source. 
Because the portion of each wastewater stream attributable to an 
individual TPPU can be determined, each wastewater stream can be 
associated with an affected source. On the other hand, wastewater 
operations may service wastewater streams associated with more than one 
affected source, just as heat exchange systems and PET process contact 
cooling towers could service multiple affected sources. Therefore, for 
wastewater operations, heat exchange systems, and PET process contact 
cooling towers, the final rule requires that said emission points and 
equipment are subject to all applicable requirements associated with 
each affected source that said emission points and equipment may 
service. In a simple example, a heat exchange system is associated with 
two affected sources that are both subject to the final rule. The owner 
or operator must comply with the provisions for heat exchange systems 
contained in the final rule. In a more complex example, a piece of 
wastewater operations equipment services wastewater streams from two 
affected sources subject to the final rule and from one source subject 
to the HON.

[[Page 48219]]

This piece of wastewater operations equipment must comply with both the 
final rule and the HON.
2. Definition of Organic HAP
    Numerous commenters recommended that the EPA restrict the list of 
organic HAP in the final standards to those that are used or are 
present in significant quantities at TPPUs or those that are listed in 
the HON, subpart F. Table 2. The EPA agreed with the commenters 
suggestion that a table providing a listing of the specific organic HAP 
expected to be regulated for each subcategory covered by the standards 
should be added to the final standards. Therefore, the definition of 
organic HAP was revised to specify those organic HAP that are known to 
be used or present in significant quantities for each subcategory, 
thereby restricting the organic HAP regulated by the final standards. 
This list is provided in Table 2 of the final standards.
    The revised definition of organic HAP was developed using available 
process description information received from industry and gathered 
from available literature. Because there may be additional organic HAP 
present at an affected source, the final standards require owners or 
operators to identify the presence of any additional organic HAP based 
on the following criteria: (1) the organic HAP is knowingly introduced 
into the manufacturing process other than as an impurity, or has been 
or will be reported under any Federal or State program, such as Title V 
or the Emergency Planning and Community Right-To-Know Act (EPCRA) 
Section 311, 312, or 313; and (2) the organic HAP is listed in Table 2 
of subpart F.
3. Determining New Source Status
    The EPA received comments regarding the procedure for determining 
if new or existing source requirements would apply to a particular 
TPPU. In response to those comments, the EPA has revised the provisions 
in the final standards.
    Under the final standards, new affected sources are created under 
each of the following four situations: (1) if a plant site with an 
existing affected source producing a thermoplastic product as its 
primary product constructs a new TPPU also producing the same 
thermoplastic product as its primary product, the new TPPU is a new 
affected source if the new TPPU has the potential to emit more than 10 
tons per year of a single HAP or 25 tons per year of all HAP; (2) when 
a TPPU is constructed at a major source plant site where the 
thermoplastic product was not previously produced as the primary 
product of an existing affected source; (3) if a new TPPU is 
constructed at a new plant site (i.e., green field site) that will be a 
major source; and (4) when an existing affected source undergoes 
reconstruction, thus making the previously existing affected source 
subject to new source standards.
    These revisions reflect the EPA's intent that new source 
requirements apply if the added TPPU has the potential to emit major 
quantities, as in the HON, or the added TPPU is a new affected source. 
The HON applied to only one source category, and it was not possible to 
add a process unit subject to the HON that was in a new source 
category. Therefore, the only differentiation to be made under the HON 
was between process units emitting major quantities of organic HAP and 
those not emitting major quantities of organic HAP. On the other hand, 
the thermoplastics standards apply to multiple source categories/
subcategories, and it is possible to add a TPPU subject to the 
thermoplastics standards that is in a new source category/subcategory. 
For this reason, if a TPPU is added to an existing plant site and said 
TPPU manufactures a thermoplastic product as its primary product not 
previously produced at the plant site as the primary product of an 
existing affected source, that TPPU, regardless of emissions, is a new 
affected source at that plant site.
4. Solid State PET Processes
    Commenters contended that all PET solid state polymerization units, 
including collocated units, should be exempted from regulation. They 
stated that PET solid state polymerization units are a vastly different 
technology than DMT and TPA processes and have different emission 
characteristics. The EPA has concluded that PET solid state processes 
are distinct from DMT or TPA processes. The EPA did not collect data on 
PET solid state processes, and it was not possible to conduct the 
required analyses for regulating PET solid state processes. Therefore, 
the final standards do not regulate these processes. However, these 
processes may be regulated in a future standard.
5. Flexible Operation Units
    The flexible operation unit provisions included in the proposed 
standards, which were modelled after the HON, have been retained in the 
final standards. Under these provisions, an owner or operator of a 
process unit that is designed and operated as a flexible operation unit 
will commit to being subject to this rule or not being subject to this 
rule based on a five-year projection of products to be manufactured and 
production quantities.
    These provisions were modified to provide clarification of the 
EPA's intent and flexibility in complying with the provisions. Under 
the final rule, once an owner or operator commits to being subject to 
this rule, there are two options for complying. Under the first option, 
an owner or operator shall determine the group status (i.e., Group 1 or 
Group 2) of each emission point based on the production of the expected 
primary product (i.e., the thermoplastic product that convinced the 
owner or operator to commit to being subject to this rule). Once the 
group status of each emission point is determined, the owner or 
operator shall comply with the applicable emission standards for the 
primary product at all times, regardless of what product is being 
manufactured. Under the second option, an owner or operator shall 
determine the group status of each emission point each time a different 
product is being manufactured, regardless of whether or not said 
product is a thermoplastic product. Then, for each Group 1 emission 
point, the owner or operator shall comply with the applicable standards 
for the primary product. The EPA recognizes that neither option is an 
ideal situation. Under the first option, an owner or operator may find 
themselves operating a control device to control a Group 1 emission 
point that has none to negligible emissions when a different product is 
being manufactured. Under the second option, an owner or operator may 
find themselves performing multiple group determinations. Again, the 
EPA recognizes that neither option is an ideal situation, but believes 
the tradeoff between these inconveniences and flipping in and out of 
separate MACT standards is worthwhile.
    As part of demonstrating compliance with the rule, an owner or 
operator required to operate a control device must establish parameter 
monitoring levels and conduct monitoring. Under either compliance 
option discussed above an owner or operator must establish parameter 
monitoring levels to reflect the manufacture of different products. 
These provisions allow an owner or operator to demonstrate that the 
parameter monitoring levels established for the primary product are 
appropriate for the manufacture of other products. If this is not the 
case, the provisions require that unique parameter monitoring levels be 
established.

[[Page 48220]]

6. Coordination With Other Clean Air Act Requirements
    At proposal, the EPA has proposed to amend subpart DDD of 40 CFR 
part 60 by removing all references to polystyrene and PET facilities. 
This action was being taken because the proposed thermoplastics 
standards would supersede the requirements in subpart DDD for 
polystyrene and PET affected sources after the compliance date of the 
thermoplastics standards. Commenters also suggested that subpart I of 
40 CFR part 63 be amended by removing all references to MBS and MABS 
affected sources after the compliance date of the thermoplastics 
standards. Other commenters requested that the EPA further clarify that 
after the compliance date of the thermoplastics standards, affected 
sources will no longer be subject to certain NSPS.
    The EPA clarified the relationship between the thermoplastics 
standards and existing applicable standards in Sec. 63.1311 of the 
final rule. The final rule was revised to state that affected sources 
subject to both the thermoplastics standards and another subpart are to 
comply with the provisions of the thermoplastic standards only after 
the compliance date for the thermoplastic standards, for those 
standards listed in Sec. 63.1311 (g) through (l) of the final rule. 
Further, after the compliance date for these standards, these affected 
sources will no longer be subject to the other subparts. The EPA 
determined that a clear understanding can be provided in these 
standards without making modifications to other subparts. Thus, the 
proposed amendments to subpart DDD were not made as part of the final 
rulemaking, nor were the suggested amendments made to subpart I. For 
subpart DDD, the language in the final rule is more specific than for 
the other subparts. Because subpart DDD regulates multiple emission 
points (i.e., process vents, equipment leaks, and process contact 
cooling towers), the EPA needed to consider if it was desired or 
necessary to continue requiring portions of subpart DDD to apply. In 
fact, it is necessary to leave the provisions for controlling the 
ethylene glycol concentration in process contact cooling towers for the 
PET TPA continuous high viscosity multiple end finisher subcategory 
intact. This is because the provisions in the thermoplastics rule for 
the degree of control required for emissions from process contact 
cooling towers for this subcategory depend on whether or not an 
existing affected source is subject or becomes subject to subpart DDD 
for this emission point.

B. Continuous Process Vent Provisions

1. Reorganization of the Standards To Distinguish Between Continuous 
Process Vents Subject to Provisions From the HON and Continuous Process 
Vents Subject to Provisions Adapted From the Polymer Manufacturing NSPS
    To better distinguish between the various requirements for 
continuous process vents, the proposed standards were reorganized. In 
the final standards, separate sections of the rule apply to the 
following subcategories: those required to comply with subpart G of the 
HON and those producing PET or polystyrene using a continuous process. 
In the final standards, Sec. 63.1315 references subpart G; Sec. 63.1316 
through Sec. 63.1320 apply to select continuous process vents at 
affected sources producing polystyrene and PET using a continuous 
process. Further, because not all process vents at affected sources 
producing polystyrene and PET using a continuous process are subject to 
Sec. 63.1316 through Sec. 63.1320, the provisions of Sec. 63.1316 
designate which process vents are subject to Sec. 63.1316 through 
Sec. 63.1320, which are subject to Sec. 63.1315 (i.e., the HON), and 
which are subject to Sec. 63.1321 (i.e., the batch process vent 
provisions). This reorganization is one way the EPA changed the 
standards to reduce complexity and eliminate potential confusion.
2. Applicability of the Polymer Manufacturing NSPS Adapted Provisions 
to the Collection of Process Sections at an Affected Source
    Commenters stated that the regulatory construction of the proposed 
standards implied that the process vent emission limits adapted from 
the Polymer Manufacturing NSPS [proposed Sec. 63.505 (b) and (c)] apply 
to each collection of material recovery sections, raw material 
preparation sections, and polymerization sections, respectively, within 
an affected source and not to each individual process section (e.g., 
material recovery section), as under the Polymer Manufacturing NSPS.
    At proposal, the EPA has intended for each individual process 
section to meet the emission limits in proposed Sec. 63.505 (b) and 
(c), as applicable. However, since proposal, the EPA has determined 
that revising the proposed standards to allow each collection of 
process sections within an affected source to meet the applicable 
emission limit would simplify compliance while achieving the same 
emission reductions. Therefore, the final standards apply the emission 
limits adapted from the Polymer Manufacturing NSPS to each collection 
of material recovery sections, raw material preparation sections, or 
polymerization reaction sections, as appropriate, within an affected 
source.
3. Clarification of Compliance Demonstration Provisions for Final 
Condenser Temperature Limits
    Commenters suggested modifying the provisions adapted from the 
Polymer Manufacturing NSPS that provide for a demonstration of 
compliance by limiting the final condenser outlet temperature. 
Commenters explained that the reporting provisions in the Polymer 
Manufacturing NSPS state that the temperature limit is only exceeded 
when the average condenser outlet temperature for a 3-hour period is 
more than 6  deg.C above (i.e., warmer) the average operating 
temperature established during the most recent performance test at 
which compliance was demonstrated. Commenters requested that the final 
standards incorporate those monitoring, test method, and recordkeeping 
and reporting requirements from the Polymer Manufacturing NSPS that 
provide this flexibility (i.e, the six degree window).
    The EPA intended for the proposed standards to be equivalent to the 
Polymer Manufacturing NSPS in this regard and have revised the final 
standards to provide the desired flexibility (i.e., the six degree 
window). In addition, the EPA has disassociated the six degree window 
from the results of the performance test and has instead associated it 
with the applicable temperature limit in the standard. The final 
standards allow all owners or operators complying with the final 
condenser operating temperature limits to be 6  deg.C warmer than the 
applicable temperature limit for the 3-hour averages. The EPA 
considered that the proposed provisions did not achieve an even-handed 
implementation of the requirements because some affected sources would 
be allowed to have 3-hour averages at warmer temperatures than others 
because their performance test results indicated a temperature closer 
to the applicable temperature limit.

C. Batch Process Vent Provisions

1. Exemption of Certain Batch Process Vents
    Commenters supported the use of cutoffs for the group status 
determination for batch process vents as found in proposed Sec. 63.506-
2(d). Specifically, commenters agreed that low annual organic HAP 
emissions and low flow rate cutoffs are suitable. Commenters explained 
that batch

[[Page 48221]]

processes are, by nature, suited to low volume production and the 
manufacture of specialty products, and as such, low flow, low emitting 
process vents are likely in batch operations.
    These provisions were retained in the final rule with one 
exception. The EPA removed the requirement to determine the volatility 
class (i.e., low, medium, or high) for batch process vents. As a 
result, there is a single minimum emission level cutoff in the final 
provisions of Sec. 63.1323(d). In addition, the EPA chose to add a 
minimum emission level of 225 kilograms per year (kg/yr) to the 
definition of batch process vent. This modification made the batch 
process vent more consistent with the continuous process vent 
provisions which have a minimum organic HAP concentration level as part 
of the definition of continuous process vent. An emission point with 
emissions equal to or less than 225 kg/yr is not considered a batch 
process vent. At proposal, the 225 kg/yr level was part of the batch 
process vent group determination procedures; Group 2 batch process 
vents with annual emissions less than 225 kg/yr were subject to 
reporting requirements related to process changes.
2. Revisions to Group Determination Procedures
    Commenters suggested changing the group determination provisions to 
only utilize emissions data from a TPPU's primary product. In addition, 
it was requested that batch process vent group determinations be 
performed on an annual basis instead of for every process change. 
Commenters stated that the proposed group determination provisions were 
considerably more complex than the continuous process vent group 
determination provisions. Commenters felt that, not only did the batch 
process vent group determination provisions require an owner or 
operator to obtain emissions data for every product that it 
manufactured, but even the most minor process changes (i.e., 
lengthening cycle times, altering process temperatures and pressures, 
etc.) triggered the need for a new group determination to be performed. 
Given the inherent process variability associated with batch 
operations, commenters contended that it would be very difficult to 
perform a group determination. Furthermore, because batch units often 
need to implement sudden process changes in response to customer 
demands, the proposed provisions could potentially require repeating 
the group determination exercise several times in a single year. 
Commenters explained that such a situation would not only serve to 
complicate a batch unit's compliance status, but could also adversely 
impact its ability to remain competitive in the marketplace.
    Four issues related to the group determination procedures were 
reviewed by the EPA: (1) a request to perform the group determination 
on the primary product, (2) a request to perform the group 
determination on an annual basis, (3) an objection that the group 
determination procedures require a new group determination to be made 
whenever minor process changes occur, and (4) an objection to the 
requirement to perform the group determination when a sudden process 
change is required.
    The EPA has considered the request to perform the group 
determination on the primary product and agrees that this would provide 
acceptable results from an environmental perspective while simplifying 
the compliance requirements for and improving the enforceability of the 
batch process vent standards. The final rule contains provisions 
allowing the owner or operator of an affected source to perform the 
group determination for batch process vents based on annualized 
production of a single product. To ensure protection to the 
environment, the final rule specifies that the highest organic HAP 
emitting product must be used when determining the group status based 
on a single product.
    In addressing the request that the group determination be required 
on an annual basis instead of for every process change, the EPA 
believes the proposed rule was clear on this point. The proposed rule 
required that emissions and average flow rate be determined on an 
annual basis and describe how to account for the production of 
different products throughout the year. In this way, the group 
determination is done on an annual basis and can account for expected 
changes in the product being produced. The final rule does not reflect 
any changes related to this specific issue.
    The third issue raised was an objection to the requirement that a 
new group determination be performed whenever minor process changes 
occur (e.g., lengthening cycle times, altering process temperatures and 
pressures, etc.). The proposed rule addressed the issue of minor 
process changes as they affect Group 2 batch process vents. If a 
process change affecting a Group 2 batch process vent occurs, a group 
determination must be made. However, the group determination provisions 
state that ``changes that are within the range on which the original 
group determination was based'' are not considered process changes. 
This allows an owner or operator to perform the initial group 
determination considering the potential for minor process changes. The 
EPA believes that the proposed provisions were clear that minor process 
changes (i.e., variations in operating conditions) do not require that 
a new group determination be performed. Addressing this concern as it 
relates to Group 1 batch process vents, the proposed provisions do not 
require a redetermination of group status for Group 1 batch process 
vents under any circumstances. Therefore, if minor process changes were 
to occur, the owner or operator would not be required to perform 
another group determination. The final rule does not reflect any 
changes related to this specific issue.
    The fourth issue raised was an objection to the requirement to 
perform a new group determination when a sudden process change is 
required. In light of the third issue raised, EPA interpreted ``sudden 
process change'' to potentially mean (1) that a new product is being 
made, (2) that the same product is being made in a fundamentally 
different way (e.g., with different raw materials), or (3) that the 
same mix of products is being made but in a different proportion. In 
the first two cases, the EPA desires and intends that a new group 
determination be made. In the third case, the owner or operator has the 
flexibility to consider this situation when performing the initial 
group determination. If this situation was not considered, then a new 
group determination would be required. The EPA feels that these types 
of process changes warrant a new group determination to ensure that the 
emission standards are being met. The final rule does not reflect any 
changes related to this specific issue.
3. Emissions Testing and Performance Testing
    Commenters requested that more flexibility should be allowed in 
designing an emissions testing scheme for batch process vents. 
Commenters cited an example, provided as part of the proposed 
definition of batch emission episode, where the charging of a vessel 
and the heating of the same vessel are considered two distinct batch 
emission episodes. In this example, the definition of batch emission 
episode would necessitate that separate emissions measurements be made 
for the charging and the heating of the vessel. This would require that 
a large number of samples be taken to characterize processes that have

[[Page 48222]]

multiple, short duration process steps. Commenters felt that the 
flexibility to test the emissions from several steps as a single batch 
emission episode would reduce testing costs without jeopardizing the 
quality of the emissions data. It was suggested that three or more 
batch cycles could be tested to obtain a representative average 
emission rate for the batch cycle.
    After consideration of this comment, the EPA chose to leave the 
provisions related to emissions testing of batch process vents 
unchanged as they relate to this specific comment. The EPA felt 
adequate data were not presented to warrant changing these provisions. 
However, the emissions testing provisions in Sec. 63.1323(b) and 
Sec. 63.1325(c) have been modified to provide flexibility and reduce 
the burden of testing, while continuing to ensure that results are 
satisfactory for applicability determinations and performance tests. 
The final provisions allow an owner or operator to test just a portion 
of the batch emission episode selected to be controlled when the owner 
or operator can demonstrate that emissions during the period to be 
tested represent emissions for the entire batch emission episode or are 
greater than the average emission rate for the batch emission episode.
4. Flow Rate Estimation Procedures
    Commenters asserted that the equations and test methods for 
calculating annual average flow rate in the proposed rule were not 
warranted. Commenters felt that the volumetric flow rate testing 
methods and the requirement to measure flow every 15 minutes specified 
in proposed Sec. 63.506-2(e) were overly burdensome and would not 
always provide representative measurements. It was suggested that 
average flow rates for a batch emission episode are better defined by 
calculations of displacement volumes with respect to the durations of 
the displacement episodes or by other more simplified methods.
    The EPA agrees that there are more simplified and potentially more 
accurate techniques for estimating flow rate for batch process vents. 
The final rule contains provisions that allow engineering assessment, 
as well as testing, to be used for estimating flow rate.
5. Emissions Estimation Procedures
    Commenters recommended removing the emissions estimation equations 
in proposed Sec. 63.506-2(b) from the rule. Commenters recommended that 
measurements or engineering estimates be allowed in place of the 
equations. It was felt the emissions estimation equations would not 
allow the flexibility necessary to account for differences in process 
technologies and operating methods.
    Commenters also supported the provisions that allowed owners or 
operators to use direct measurement or engineering assessment to 
estimate emissions in cases where the emissions estimation equations 
are inappropriate for a particular type of operation or where, speaking 
to direct measurement, a more refined estimate of emissions is 
necessary. However, commenters objected to the requirement to 
demonstrate that the emissions estimation equations and direct 
measurement methods are not appropriate before engineering assessment 
can be used.
    In response to the first issue raised, the emissions estimation 
equations have been retained in the final rule. The EPA found noting in 
the public comments that would warrant removing these procedures.
    In response to the second issue, the EPA believes the data required 
to use the emissions estimation equations should be obtainable with 
reasonable effort. Further, specific comments regarding the inaccuracy 
or inappropriateness of the equations were not made. Given this, the 
EPA favors a more consistent estimation technique which is provided by 
the use of the emissions estimation equations, and the final rule 
requires the owner or operator to demonstrate that the emissions 
estimation equations are inappropriate before the use of engineering 
assessment is allowed.
    However, independent of the comments provided, the EPA has 
concluded that direct measurement of emissions may prove to be 
difficult and may or may not provide an increased assurance of accuracy 
over the use of engineering assessment. Therefore, if an owner or 
operator can demonstrate that the emissions estimation equations are 
not appropriate, the final provisions allow the use of either direct 
measurement or engineering assessment.
6. Other Changes Resulting From EPA Review
    In addition to changes made to the proposed rule as a result of 
public comment, changes were made as a result of EPA independently 
reviewing the rule between proposal and promulgation. Because the batch 
process vent provisions included in the rule are among the EPA's first 
attempts to regulate batch process vents, the EPA felt an ongoing, 
independent review of these provisions after proposal was warranted. 
Changes resulting from this review are listed below:
    (1) Allow applicability determinations and compliance 
demonstrations (i.e., performance tests) to be based on TOC or organic 
HAP. Allow the use of Method 25A to compliment the use of TOC as a 
potential basis for applicability determinations and compliance 
demonstrations.
    (2) Allow the establishment of parameter monitoring levels to be 
based on performance tests or a combination of performance tests and 
engineering assessment (discussed in more depth in Section H, 
Monitoring). To accommodate this change, modifications to the batch 
process vent testing provisions were required.
    (3) Add provisions specifying how the batch cycle limitation is to 
be determined.
    (4) Change the reporting requirement for batch cycle limitation 
records from quarterly to annually.
    These changes are discussed in the paragraphs below.
    In the final rule, the EPA has allowed the use of TOC as the basis 
for applicability and compliance demonstrations (i.e., performance 
tests) as an alternative to organic HAP. The EPA has done this to 
provide flexibility to the regulated community and to reduce the 
overall burden of the rule. The EPA considered the impacts of allowing 
TOC to serve as a surrogate for organic HAP in applicability and 
compliance demonstrations and did not find any negative impacts. 
Further, allowing the use of Method 25A as a complement to the use of 
TOC as a surrogate to organic HAP reduces the burden of implementing 
the final rule with little to no adverse impact on the measurement of 
pollutants in the regulated batch process vents. To the best of the 
EPA's knowledge, the batch process vents regulated by this rule are 
predominantly organic HAP. Also, with one exception (i.e., ethylene 
glycol), the regulated organic HAP, which are listed in the definition 
of organic HAP found in the final rule, have response factors to Method 
25A adequate to ensure satisfactory measurement of TOC in the batch 
process vents. For certain emission points where the EPA considered the 
presence of ethylene glycol and its corresponding poor response factor 
to call into question the results that would be obtained using Method 
25A, the use of Method 25A is not allowed. For all other emission 
points, the EPA has allowed the use of TOC for applicability and 
compliance demonstrations as an alternative to organic HAP in the final 
rule.

[[Page 48223]]

    In the final rule, the EPA allows the establishment of parameter 
monitoring levels to be based on either performance tests, as in the 
proposed rule, or a combination of performance tests, engineering 
assessment, and manufacturer's recommendations. This change affects all 
emission points which are required to establish parameter monitoring 
levels, including batch process vents. The rationale for this change is 
discussed in detail in Section H, monitoring, of this document. For 
batch process vents, this change in the procedures for establishing 
parameter monitoring levels necessitated changes to the performance 
test provisions. When an owner or operator chooses to establish 
parameter monitoring levels based exclusively on performance tests, the 
final rule directs that the performance test must include the entire 
batch emission episode selected to be controlled. As discussed earlier, 
an owner or operator may choose to control just a portion of a batch 
emission episode; in such a scenario, the performance test must include 
the entire portion of the batch emission episode selected to be 
controlled. Alternatively, when an owner or operator chooses to 
establish parameter monitoring levels based on a combination of 
performance tests, engineering assessment, and manufacturer's 
recommendations, the final rule allows an owner or operator to test 
either the entire batch emission episode, or portion thereof, selected 
to be controlled or to test only the entire batch emission episode, or 
portion thereof, selected to be controlled.

    Note: The flexibility to test a period of the batch emission 
episode that is less than the entire batch emission episode, or 
portion thereof, selected to be controlled is discussed earlier in 
this section.

    The final rule includes provisions specifying how the batch cycle 
limitation, required for Group 2 batch process vents, is to be 
established. The EPA felt that the proposed rule was ambiguous 
concerning the establishment of the batch cycle limitation and added 
these provisions to make the rule complete. The added provisions 
provide additional description of the purpose of the batch cycle 
limitation and describe what documentation is required as part of 
establishing the batch cycle limitation.
    In the final rule, the EPA changed the requirement for reporting 
the number and type of batch cycles accomplished for a Group 2 batch 
process vent from quarterly to annually. The EPA felt that quarterly 
reporting was unwarranted given that the compliance requirement (i.e., 
the batch cycle limitation) was on an annual basis.

D. Wastewater Provisions

1. Steam Stripping Styrene-Containing Wastewater Streams
    Numerous commenters claimed that the selection of steam stripping 
as the basis of the standards for the treatment of styrene-containing 
wastewater streams was inappropriate due to polymerization problems. 
The EPA acknowledges that steam stripping styrene-containing 
wastewaters may prove to be impractical in some cases due to issues 
raised by the commenters. However, steam stripping is not required by 
the standards. Both the proposed and final wastewater provisions 
provide several options for complying with the standards. If the owner 
or operator judges steam stripping to be impractical for their process, 
one of the other wastewater compliance options may be used. The EPA 
considers one of these compliance options, the use of enclosed sewers 
to a biological treatment operation unit, a favorable option because 
styrene is highly biodegradable. Further, because the organic HAP 
emitted from the subcategories regulated by this rule are highly 
biodegradable, the EPA has determined that it is not necessary to 
require affected sources to demonstrate that 95 percent of the mass of 
organic HAP listed in Table 9 of the HON are removed when using a 
biological treatment unit, as required by the HON. Therefore, the final 
thermoplastic rule does not require an owner or operator to make this 
demonstration.
2. Elimination of Regulations Pertaining to Wastewater From Polystyrene 
Affected Sources
    In addition to considering the comments made concerning the 
impracticality of steam stripping styrene-containing wastewaters, the 
EPA evaluated the need to regulate wastewater from polystyrene affected 
sources. Because the water solubility of styrene is limited to 
approximately 300 ppm and styrene is the only known organic HAP emitted 
during the production of polystyrene, it is not possible for a 
wastewater stream that only contains styrene to meet the Group 1 
applicability criteria (i.e., 1,000 ppm minimum concentration). 
Therefore, because, to the best of EPA's knowledge, there can be no 
Group 1 wastewater streams at a polystyrene affected source, the final 
standards do not regulate wastewater from this subcategory.

E. Process Contact Cooling Tower Provisions

1. Ethylene Glycol Jet Retrofit for PET Existing Affected Sources
    Commenters disagreed with the EPA's position that ethylene glycol 
jets are the vacuum systems technology of choice for a retrofit 
application and with the EPA determination that ethylene glycol jets 
are cost effective. Commenters contended that the EPA had failed to 
consider numerous costs factors and design considerations.

    Note: While the proposed standards did not require the use of 
ethylene glycol jets, they were the technology on which the 
prohibition of process contact cooling towers was based.

    Based on the data available at proposal, the costs and emission 
reductions achievable through the use of ethylene glycol jets in 
retrofit situations were acceptable. The EPA knew that the proposed 
standards for ethylene glycol jets were based on limited data and 
limited knowledge obtained from one manufacturer of PET. The EPA took 
special effort to make this clear and to solicit comments on the 
installation and operation of ethylene glycol jets in the preamble to 
the proposed standards (see pages 16104 and 16107 of the preamble). 
Based on the comments provided, the EPA agrees that ethylene glycol 
jets are not a suitable retrofit technology for existing affected 
sources, either technically or economically, for meeting the provisions 
of the proposed standards that prohibit the use of process contact 
cooling towers. These comments are presented and discussed in detail in 
the Basis and Purpose Document for the Final Standards [EPA-453/R-96-
001b; May 1996].
    As explained in chapter 6.0 of the Basis and Purpose Document for 
the Final Standards [EPA-453/R-96-001b; May 1996], steam jet vacuum 
systems can be used to create a vacuum on the process vessels, contact 
condensers can be used to condense steam, and the contact condenser 
effluent can be recirculated to the process contact cooling tower. In 
the process contact cooling tower, stripping and drift may occur, 
resulting in organic HAP emissions to the atmosphere. Volatilization of 
organic HAP from the vacuum system may also occur. The following 
paragraphs describe some of the public comments on this issue and the 
EPA's responses.
    Given that the EPA was convinced by the commenters' arguments that 
ethylene glycol jets are not a suitable retrofit technology for 
existing affected sources, the EPA considered alternate

[[Page 48224]]

options for controlling emissions from the vacuum system. Both volatile 
organic HAP (VOHAP) and ethylene glycol are emitted from the vacuum 
system, and the EPA chose to approach each of these emissions 
separately.
    To address VOHAP emissions from the vacuum system at existing 
sources, the final standards treat the contact condenser effluent as 
wastewater and apply the same provisions to it as are applied to 
process wastewater. Contact condenser effluent is considered process 
wastewater based on the proposed wastewater provisions, and without any 
special provisions or specific mention, the wastewater provisions will 
apply. The EPA judged that treating the contact condenser effluent 
prior to any significant opportunity for volatilization protects the 
environment. Further, the HON wastewater provisions, which are the 
basis for the wastewater provisions in the proposed and final 
standards, have been judged to be environmentally effective and cost 
effective overall. Therefore, it the wasetwater provisions deem a 
wasterwater stream to be Group 2 (i.e., not requiring control), that 
means it is not cost effective to control any VOHAP that may be 
contained in that wastewater stream.
    Addressing emissions from the process contact cooling tower was 
more complex.

    Note: The HON did not specifically address process contact 
cooling towers because they are not used extensively in the 
synthetic organic chemical manufacturing industry (SOCMI).

    Given that the emissions of VOHAP would be dealt with through the 
use of the wastewater provisions at existing affected sources, the key 
issue related to cooling towers became the emissions of ethylene 
glycol. Between proposal and promulgation, the EPA spent considerable 
effort gathering information on PET vacuum systems and their emissions. 
Much of this effort focused on emissions from the cooling towers, 
specifically emissions of ethylene glycol. In addition to gathering 
information on emissions, the EPA investigated control options aimed at 
reducing emissions of ethylene glycol from cooling towers. Possible 
control options, not considering ethylene glycol jets, included 
treating a slipstream of the cooling tower water to reduce the 
concentration of ethylene glycol or installing a large heat exchanger 
to isolate the cooling tower from the process. None of these control 
options were shown to be cost effective. All of the factors discussed 
above have led the EPA to conclude that, with one exception discussed 
below, specific provisions for controlling emissions from process 
contact cooling towers are not warranted for existing affected sources. 
Instead, the EPA is requiring that the wastewater provisions be applied 
to all vacuum system wastewater.
    The one exception where it was found to be cost effective to 
control emissions from existing process contact cooling towers was for 
affected sources manufacturing PET using a continuous TPA high 
viscosity multiple end finisher process. Based on industry reported 
emissions, total ethylene glycol emissions for all PET subcategories 
are approximately 340 Mg/yr, and approximately 230 Mg/yr are being 
emitted from the single plant site that is part of this subcategory. 
This subcategory is required to keep the concentration of ethylene 
glycol in the process contact cooling tower water to 4 percent by 
weight or less.
    As at proposal, the final standards require that owners or 
operators of new affected sources manufacturing PET not send contact 
condenser effluent associated with a vacuum system to a process contact 
cooling tower.
2. Vacuum System Wastewater
    Many commenters objected to the proposed provision designating all 
contact condenser effluent as Group 1 wastewater streams. Commenters 
stated that the EPA had not provided adequate rationale explaining why 
the standards for contact condenser effluent were more stringent than 
the standards for other wastewater streams. Because the automatic 
designation of contact condenser effluent as Group 1 wastewater was 
done in an effort to make the use of noncontact condensers within 
steam-based vacuum systems equivalent to ethylene glycol jets, and that 
need no longer exists for existing affected sources, there is no longer 
a need or justification to designate all contact condenser effluent 
from existing PET affected sources as Group 1 wastewater. As a result, 
the EPA has changed the final standards to implement the group 
determination procedure (i.e., Group 1 or Group 2) for contact 
condenser effluent from existing PET affected sources.
    On the other hand, the final standards continue to prohibit the use 
of process contact cooling towers for new PET affected sources.

    Note: This requirement is equivalent to the MACT floor.

    However, the provisions designating all contact condenser effluent 
streams from new PET affected sources as Group 1 wastewater have been 
dropped from the final standards. Like existing PET affected sources, 
the final standards implement the group determination procedure for 
contact condenser effluent from new PET affected sources. As described 
earlier, the purpose for designating all contact condenser effluent 
streams as Group 1 wastewater was to ensure equivalency between the use 
of ethylene glycol jets and the use of noncontact condensers. At the 
time of proposal, the EPA considered ethylene glycol jets to be 
pollution free because there was no wastewater stream produced. The 
automatic designation of all contact condenser effluent as Group 1 
wastewater was meant to address the absence of wastewater when ethylene 
glycol jet systems are used. Since proposal, the EPA has come to 
understand that the use of ethylene glycol jets does not eliminate 
emissions because the additional loading to the glycol recovery unit 
can create additional emissions from process vents or wastewater 
streams or both.
    Realizing that ethylene glycol jets are not pollution free, the EPA 
considered the additional emissions at the glycol recovery unit when 
ethylene glycol jets are used and the emissions from the contact 
condenser effluent when noncontact condensers are used.

    Note: The use of ethylene glycol jets would still achieve more 
control than using steam jets and subjecting the contact condenser 
effluent to the wastewater provisions.

    In either case, an equivalent quantity of VOHAP is introduced to 
the vacuum system from the process. Process vents and wastewater 
streams at the glycol recovery unit are subject to the appropriate 
provisions of the standards. For example, a wastewater stream at the 
glycol recovery unit would be subject to a group determination and, 
based on the results, would be controlled if required. The EPA judged 
that to require the same action for the contact condenser effluent from 
noncontact condensers would ensure equivalency between a new affected 
source using ethylene glycol jets and one using noncontact condensers.

F. Equipment Leak Provisions

1. Polystyrene
    A number of commenters stated that the EPA had overestimated the 
emissions from equipment leaks at polystyrene affected sources in 
general and, in particular, from components containing styrene as the 
organic HAP. The commenters claimed that the use of the average SOCMI 
emission factors to estimate emissions was inappropriate because the 
vapor pressure of styrene at typical operating conditions in

[[Page 48225]]

polystyrene affected sources equates to a concentration of less than 
10,000 ppm and no leaks would be detected using a leak definition of 
10,000 ppm. The commenters also stated that the effect of using the 
average SOCMI emission factors was to justify the HON equipment leak 
program (i.e., subpart H) and that, if the EPA used a more realistic 
estimate of emissions (e.g., the emission factor for components with 
concentrations less than 10,000 ppm), a re-evaluation of the costs and 
emission reductions would likely result in a conclusion that the HON is 
not cost effective. The commenters recommended that if any program was 
to be implemented for polystyrene affected sources and especially for 
components in styrene service, it should either be a visual-only 
program or, at most, a program based on a State Reasonably Achievable 
Control Technology (RACT) program.
    In response to these comments, the EPA re-evaluated the analysis 
that served as the basis for proposing the equipment leak provisions 
from the HON for polystyrene and other styrene-based resin affected 
sources.

    Note: The results of this re-evaluation are contained in Item 
IV-B-2, Docket A-92-45.

    In re-evaluating that analysis, the EPA determined the MACT floor 
for each subcategory. Because a MACT floor was determined to exist and 
the Clean Air Act does not allow the EPA to set a standard less 
stringent than the MACT floor, the EPA determined that some standard 
must be set for these subcategories.
    The EPA agrees with the commenters that the average SOCMI emission 
factors are likely to overestimate emissions from components containing 
or contacting styrene. Therefore, the EPA lowered the emission factors 
used to estimate the emissions from these components. The EPA also 
adjusted leak rate factors based on additional data and comments from 
the industry. Adjustments to the emission factors and leak rates had 
the effect of reducing both the overall emission estimates and the 
emission reductions associated with the current industry programs, the 
MACT floor programs, and the HON program.
    In addition, the EPA re-evaluated the costing program used to 
estimate the costs for the various equipment leak programs. Errors were 
discovered in the costing program. The net effect of correcting these 
errors was to lower the estimated costs for all of the various 
equipment leak programs. The incremental differences between the 
various programs decreased as well, but not by as much as the overall 
costs.
    To determine whether or not the subpart H provisions were cost 
effective, the EPA examined the incremental costs and emission 
reductions between the HON program and the MACT floor program for each 
of the subcategories.

    [Note: In the original analysis, the EPA examined the cost 
between the HON program and each facility's specific current 
program.]

    Based on the incremental differences between the HON and the MACT 
floor programs, the EPA determined that the HON requirements are cost 
effective for each of the styrene-based resin subcategories, including 
the three polystyrene subcategories. Therefore, the EPA has retained 
the HON requirements in the final rule.
2. PET
    Many commenters objected to the imposition of the HON equipment 
leak requirements on PET affected sources, especially those using the 
TPA process. These commenters stated that, due to the preponderance of 
components in heavy liquid service, no program should be imposed or, if 
a program is required, it should simply be a visual-only program. Some 
of the commenters referred to the rationale in the development of the 
Polymer Manufacturing NSPS [40 CFR part 60, subpart DDD], which 
exempted PET affected sources using a continuous TPA process from 
equipment leak regulation.
    As was done for the styrene-based resin subcategories, the EPA re-
evaluated the emission estimates and cost estimates for all of the PET 
subcategories. The results of this re-evaluation are found in Item IV-
B-3, Docket A-92-45. The following actions were taken as part of the 
re-evaluation. First, the EPA lowered the emission factors used to 
estimate emissions from components in heavy liquid service to take into 
account the properties of ethylene glycol. Second, the EPA limited the 
re-evaluation of costs and emission reductions to only those facilities 
that provided specific component profiles (i.e., component counts and 
types of service). The results of the re-evaluation showed that, except 
for one PET subcategory, the HON requirements are cost effective. Thus, 
the final rule retains, for the most part, the HON requirements for the 
PET subcategories.

    Note: Modifications to the HON requirements are discussed below.

    The re-evaluation of the proposed equipment leak provisions showed 
that the provisions were not cost effective for PET affected sources 
using a continuous TPA high viscosity multiple end finisher process. 
Thus, this subcategory, which currently contains only one affected 
source, is exempt from the equipment leak requirements in the final 
rule.
    With regard to exempting PET affected sources altogether based on 
the exemption contained in the Polymer Manufacturing NSPS, the EPA does 
not agree with the commenters. During the development of the Polymer 
Manufacturing NSPS, information available to the EPA indicated that all 
components at PET TPA continuous facilities were in heavy liquid 
service. Information provided by the industry during the development of 
this rulemaking, however, shows the presence of components in gas/vapor 
service and in light liquid service at some PET TPA facilities. The 
decision to require an equipment leak program for this rulemaking is 
based on this newer information. However, the EPA continues to agree 
that, if a PET TPPU consists solely of components in heavy liquid 
service, or in vacuum service, then said TPPU should be exempt from the 
equipment leak standards. The final rule contains this provision.
    Many commenters were concerned about the recordkeeping and 
reporting requirements, especially for PET TPA affected sources where 
the vast majority of components are in heavy liquid service. While the 
EPA believes the original requirements were the minimum required to 
ensure compliance with the overall program, the EPA has reduced the 
burden of the recordkeeping and reporting requirements for these 
subcategories in light of the preponderance of components in heavy 
liquid service. The most significant change is the elimination of the 
requirement to initially list the identification numbers of components 
in heavy liquid service.
    Finally, several commenters expressed concern with the use of 
Method 21 to detect leaks from components in ethylene glycol (i.e., 
heavy liquid) service, stating in part that Method 21 would not detect 
an ethylene glycol leak based on the properties of ethylene glycol and 
the operating conditions of the process. The EPA agrees that Method 21 
is inappropriate for determining ethylene glycol leaks where the 
leaking component is in heavy liquid service. However, Sec. 63.169 of 
subpart H does not require the use of Method 21; it is one of two 
alternatives for determining the presence of leaks from components in 
heavy liquid service. The other alternative is to use a sensory-based 
detection method. The final rule has been revised to clarify that leaks 
are to be determined exclusively through the use of visual, audible,

[[Page 48226]]

olfactory, and any other detection methods; Method 21 is not to be used 
to determine leaks from components in heavy liquid service at PET 
facilities.

G. Emissions Averaging Provisions

1. Number of Emission Points Allowed in Emissions Averaging
    Numerous commenters requested that the number of emission points 
allowed in an emissions average be increased to 20 points from the 5 
points allowed at proposal. If pollution prevention measures are used, 
commenters requested that an additional 5 emission points be allowed 
from the 3 emission points allowed at proposal. The commenters stated 
that this would be consistent with the HON.
    In response to comments and to be more consistent with the HON and 
the proposed Group I Polymers and Resins NESHAP, the number of emission 
points allowed in emissions averaging at a plant site has been 
increased to 20 points, with an additional 5 points allowed if 
pollution prevention measures are used. These values (i.e., 20/25) are 
the maximum allowed for all emissions averages at a plant site, 
regardless of the number of affected sources present at a plant site or 
the number of emissions averaging programs implemented.
2. Including Batch Process Vents in Emissions Averaging
    Several commenters requested that batch process vents be included 
in the emissions averaging provisions. The EPA had not allowed 
emissions averaging of batch process vents at proposal. The proposal 
preamble stated that the accuracy and consistency of emissions 
estimates needed for emissions averaging were considered to be greater 
than those needed for applicability determinations. However, upon 
review, the EPA has determined that having the same procedures to 
estimate emissions for applicability determinations and emissions 
averaging is reasonable. The final standards allow emissions averaging 
of existing batch process vents as well as aggregate batch vent 
streams.

H. Compliance and Performance Test Provisions and Monitoring 
Requirements

1. Excused Excursions
    Many commenters requested that the proposed standards allow excused 
excursions in the same way that the HON allows excused excursions. In 
the final standards, the EPA included provisions to excuse a certain 
number of excursions for each reporting period. These provisions are 
identical to the HON provisions. The decision to include excused 
excursion provisions was based on data and information presented in 
public comments received on the proposed standards and received during 
industry meetings held after proposal. The commenters contended that by 
not allowing excused excursions in these standards, the EPA has made 
these standards more stringent than the HON, which the proposed 
standards and the costs of the proposed standards were modelled after. 
The commenters requested that the EPA justify the increased cost of 
imposing the more stringent ``no excused excursion'' provisions. The 
EPA agreed with the commenters that not allowing excused excursions 
could impose significant additional capital and operating costs on the 
affected source for only negligible corresponding reductions in air 
emissions. As is always the case, a State has the discretion to impose 
more stringent requirements than the requirements of NESHAP and other 
federal requirements and could choose not to allow the excused 
excursion provisions contained in these standards.
    The EPA considered the number of excused excursions that would be 
most appropriate for these standards and determined that the number of 
excursions allowed in the HON is reasonable. Therefore, the final 
standards allow a maximum of 6 excused excursions for the first 
semiannual reporting period, decreasing by 1 excursion each semiannual 
reporting period. Starting with the sixth semiannual reporting period 
(i.e., the end of the third year of compliance) and thereafter, 
affected sources are allowed one excused excursion per semiannual 
reporting period.
2. Parameter Monitoring Levels
    Commenters requested that more flexibility be permitted for 
establishing compliance levels for parameter monitoring. The commenters 
asked the EPA to allow the use of the HON range concept, which 
recognizes that a process or control device operates properly over a 
range of conditions.
    The EPA revised the requirements for establishing parameter 
monitoring levels to incorporate the concepts included in the HON range 
concept.

    Note: The final standards continue to use the term level.

    Under the final rule, the owner or operator can choose between 
three procedures for establishing parameter monitoring levels. By 
providing the flexibility to establish parameter monitoring levels 
based on one of the three procedures, site-specific levels can be 
chosen which best accommodate variation in emission point 
characteristics and control device designs. These three procedures for 
establishing parameter monitoring levels are based on: (1) performance 
tests; (2) performance tests, engineering assessments, and/or 
manufacturer's recommendations; and (3) engineering assessments and/or 
manufacturer's recommendations. The establishment of a parameter 
monitoring level based solely on performance tests is preapproved by 
the Administrator; however, parameter monitoring values determined 
using the last two procedures, which may or may not use the results of 
performance tests, must be approved by the Administrator for each 
individual case.
3. Other Changes Resulting from EPA Review
    In addition to changes made to the proposed rule as a result of 
public comment, changes were made as a result of EPA independently 
reviewing the rule between proposal and promulgation. In the final 
rule, the EPA has allowed the use of TOC, minus methane and ethane, as 
the basis for compliance demonstrations (i.e., performance tests) as an 
alternative to organic HAP for continuous process vents, batch process 
vents, storage vessels, and wastewater streams.

    Note: The term ``TOC,'' as used in the remainder of this discussion 
and as defined in the final rule, denotes ``TOC, minus methane and 
ethane.''

    The final rule also allows the use of TOC as an alternate basis for 
applicability determinations for batch process vents; TOC is not 
allowed as an alternate basis for applicability determinations for 
continuous process vents. In addition, the final rule allows the use of 
Method 25A to measure TOC in these instances were TOC serves as an 
alternative basis for compliance demonstrations or applicability 
determinations.
    These changes were made to provide flexibility to the regulated 
community and to reduce the overall burden of the rule. The EPA 
considered the impacts of allowing TOC to serve as a surrogate for 
organic HAP in compliance demonstrations and did not find any adverse 
impacts. Further, in allowing the use of Method 25A as a complement to 
the use of TOC as a surrogate to organic HAP, the EPA judged that the 
burden of implementing the final rule would be reduced with no adverse 
impacts.

[[Page 48227]]

    As proposed, the provisions concerning applicability determinations 
and compliance demonstrations allowed an owner or operator to measure 
total organic HAP or TOC; however, the proposed rule required Method 18 
for measurement of organic compounds in both cases. In light of this, 
the major difference between the proposed and final rule is the 
flexibility to use Method 25A in measuring TOC. In deciding to allow 
the use of Method 25A, the EPA considered the composition of the 
emission streams and considered provisions that could be implemented to 
safeguard against inappropriate uses of Method 25A. To the best of the 
EPA's knowledge, the emission streams regulated by this rule are 
predominantly organic HAP. Also, with one exception (i.e., ethylene 
glycol), the regulated organic HAP, which are listed in the definition 
of organic HAP found in the final rule, have response factors to Method 
25A adequate to ensure satisfactory emissions measurements. To 
safeguard against inadequate emissions measurements that might result 
from the inappropriate use of Method 25A, the final rule specifies the 
calibration gas to be used (i.e., the organic HAP representing the 
largest percent by volume) and what is an acceptable response for the 
calibration gas (i.e., 20 times the standard deviation of the response 
from the zero calibration gas).
    In considering the use of TOC as an alternate basis for 
applicability determinations, and the complementary use of Method 25A 
to measure TOC, the EPA evaluated applicability determinations for 
continuous process vents and batch process vents.

    [Note: The applicability determination procedures for storage 
vessels and wastewater streams do not use airborne organic HAP 
concentration values. Therefore, the use of Method 25A for these 
emission points is not applicable.]

    The applicability determination procedure for continuous process 
vents (i.e., the TRE equation) requires an owner or operator to 
estimate the concentration and emission rate for both organic HAP and 
TOC. Because both of these values are required and were the basis for 
the original TRE analysis, the EPA judged that it was inappropriate to 
use TOC as an alternate basis to organic HAP for the applicability 
determinations for continuous process vents. On the other hand, the 
original analysis for batch process vents (i.e., the Batch Processes 
ACT) was based on the control of TOC; thus, the EPA considered the use 
of TOC as an alternate basis for the applicability determinations for 
batch process vents to be satisfactory.

I. Recordkeeping and Reporting

    Several commenters stated that the recordkeeping and reporting 
requirements of the proposed standards were extremely burdensome. These 
commenters requested that the EPA reduce unnecessary recordkeeping and 
reporting requirements in the final standards. Commenters requested 
that the frequency with which records must be retained be reduced. The 
commenters also contended that records should only be required if an 
excursion has occurred. The commenters contended that records showing 
compliance with the standards were unnecessary.
    The EPA has made every effort to reduce the recordkeeping 
requirements of the final thermoplastics rule. The EPA recognizes that 
unnecessary recordkeeping and reporting requirements would burden both 
the affected source and EPA enforcement agencies.
    The EPA reviewed the recordkeeping required by the proposed rule 
and has made reductions in the amount of information that is required 
to be recorded. The final rule has been changed to require recording 
and retention of hourly average values of continuously monitored 
values. The proposal required that 15-minute averages be calculated and 
recorded. Under the proposal, if the daily average value was above the 
minimum or below the maximum established parameter monitoring levels 
(i.e., excess emissions occurred), the 15-minute values had to be 
retained; if the daily average value did not exceed the established 
parameter monitoring level, the 15-minute values could be converted to 
hourly averages, and the hourly averages could be retained instead of 
the 15-minute averages. Upon reconsideration, the EPA found that hourly 
average values provide a sufficient record to support the calculation 
of the daily average value. Therefore, to reduce the recordkeeping 
burden, the rule has been changed to specify that only hourly averages 
must be calculated and recorded. The rule no longer requires 
calculating or recording of 15-minute average values.
    For emission points where continuous parameter monitoring is 
required, the value of the parameter must still be measured at least 
once every 15 minutes, but only the hourly average must be calculated 
and recorded. Many facilities already have computerized systems and 
monitor parameters more frequently than once every 15 minutes for 
process control purposes. The 15-minute monitoring frequency is 
consistent with the General Provisions and previous NSPS and NESHAP for 
emission points from similar industries.
    In addition, the EPA added provisions [Sec. 63.1335(h)] that allow 
an owner or operator to implement a reduced recordkeeping program 
provided that certain criteria related to the monitoring system and the 
performance of the process, as it relates to maintaining compliance 
with the monitoring provisions, are met. Under these provisions it is 
possible for an owner or operator to retain only daily average values 
or, after a period of 6 consecutive months without an excursion, to 
retain no daily records.
    The EPA believes that the recordkeeping requirements of the final 
rule are necessary to show compliance. The EPA will continue to require 
owners or operators to keep records, regardless of whether there was an 
excursion or not. These records are necessary to prove compliance when 
no excursion has occurred and are used to determine the severity of a 
violation, and, thus, how much of a penalty should be assessed once an 
excursion has occurred.
    The EPA has made every effort to reduce the reporting requirements 
of the final rule. The EPA reviewed each report required at proposal, 
and determined that two of these reports, the Initial Notification and 
the Implementation Plan, contained many requirements that were 
duplicative with the existing operating permit program. For this 
reason, the EPA has removed the requirements for the Initial 
Notification and Implementation Plan from the final rule.
    The EPA considers the recordkeeping and reporting requirements of 
the final rule to be the minimum necessary to ensure compliance.
    Upon further review, the EPA decided to add a new report, the 
Precompliance Report, to the final rule to allow the owner or operator 
of an affected source to request an extension of compliance or to 
request approval to use alternative monitoring parameters, alternative 
continuous monitoring or recordkeeping, or alternative controls. At 
proposal, these items were submitted in the Implementation Plan. 
Overall, these changes, deleting the Initial Notification and the 
Implementation Plan and adding the Precompliance Report, result in a 
reduction of the reporting burden for the affected source.

[[Page 48228]]

VI. Administration Requirements

A. Docket

    The docket is an organized and complete file of all the information 
submitted to or otherwise considered by the EPA in the development of 
the final standards. The principal purposes of the docket are:
    (1) To allow interested parties to readily identify and locate 
documents so that they can intelligently and effectively participate in 
the rulemaking process; and
    (2) To serve as the record in case of judicial review, except for 
interagency review materials as provided for in section 307(d)(7)(A).

B. Executive Order 12866

    Under Executive Order 12866 [58 FR 5173, October 4, 1993], the EPA 
must determine whether the regulatory action is ``significant'' and 
therefore subject to Office of Management and Budget (OMB) review and 
the requirements of the Executive Order. The Executive Order defines 
``significant regulatory action'' as one that is likely to result in 
standards that may:
    (1) Have an annual effect on the economy of $100 million or more or 
adversely affect, in a material way, the economy, a sector of the 
economy, productivity, competition, jobs, the environment, public 
health or safety, or State, local, or tribal governments or 
communities;
    (2) Create a serious inconsistency or otherwise interfere with an 
action taken or planned by another agency;
    (3) Materially alter the budgetary impact of entitlement, grants, 
user fees, or loan programs or the rights and obligations of recipients 
thereof; or
    (4) Raise novel legal or policy issues arising out of legal 
mandates, the President's priorities, or the principles set forth in 
the Executive Order.
    Pursuant to the terms of the Executive Order, the OMB has notified 
the EPA that it considers that a ``significant regulatory action'' 
within the meaning of the Executive Order. The EPA submitted this 
action to the OMB for review. Changes made in response to suggestions 
or recommendations from the OMB were documented and included in the 
public record.

C. Paperwork Reduction Act

    The information collection requirements for this NESHAP have been 
submitted for approval to the OMB under the Paperwork Reduction Act, 44 
U.S.C. 3501 et seq. An Information Collection Request (ICR) document 
has been prepared by the EPA (ICR. No. 1737.01), and a copy may be 
obtained from Sandy Farmer, OPPE Regulatory Information Division 
(2137), U.S. Environmental Protection Agency, 401 M Street, S.W., 
Washington, DC 20460, or by calling (202) 260-2740.
    The public recordkeeping and reporting burden for this collection 
of information is estimated to average approximately 4,000 hours per 
respondent, at approximately 1,000 hours per response for 4 responses 
each, for each of the first 3 years following promulgation of the rule. 
These estimates include time for reviewing instructions, searching 
existing data sources, gathering and maintaining the data needed, and 
completing the reviewing the collection of information.
    Sent comments regarding the recordkeeping and reporting burden 
estimate or any other aspect of this collection of information, 
including suggestions for reducing this burden, to Chief, Information 
Policy Branch (2137), U.S. Environmental Protection Agency, 401 M 
Street, S.W., Washington, DC 20460; and to the Office of Information 
and Regulatory Affairs, Office of Management and Budget, Washington, DC 
20503, marked ``Attention: Desk Officer for EPA.''

D. Regulatory Flexibility Act.

    The Regulatory Flexibility Act (RFA) (Pub. L. 96-354, September 19, 
1980) requires Federal agencies to give special consideration to the 
impact of regulation on small businesses. The RFA specifies that a 
final regulatory flexibility analysis must be prepared if a final 
regulation will have a significant economic impact on a substantial 
number of small entities. To determine whether a final RFA is required, 
a screening analysis, otherwise known as an initial RFA, is necessary.
    Regulatory impacts are considered significant if:
    (1) Annual compliance costs increase total costs of production by 
more than 5 percent, or
    (2) Annual compliance costs as a percent of sales are at least 20 
percent (percentage points) higher for small entities, or
    (3) Capital cost of compliance represent a significant portion of 
capital available to small entities, or
    (4) The requirements of the regulation are likely to result in 
closures of small entities.
    A ``substantial number'' of small entities is generally considered 
to be more than 20 percent of the small entities in the affected 
industry.
    Consistent with Small Business Administration (SBA) size standards, 
a thermoplastic producing firm is classified as a small entity if it 
has less than 750 employees and is unaffiliated with a larger entity. 
Based upon this criterion, only one firm, an MBS producer, employs less 
than 750 workers.
    Data were available to examine two of the criteria; these were the 
potential for closure, and comparison of compliance costs as a 
percentage of sales.
    For criterion one, the affected source is not expected to fall at 
risk of closure from the regulations, thus this criterion is not met. 
Also, the compliance costs were only 0.001 percent of total sales for 
the affected source, and this does not meet criterion two. Because the 
economics analysis lead to the conclusion that not MBS facilities at 
risk of closure, this criterion is not met.
    In conclusion, and pursuant to section 605(b) of the RFA, the 
Administrator certifies that these standards will not have a 
significant economic impact on a substantial number of small entities. 
The basis for this certification is that the economic impacts for small 
entities do not meet or exceed the criteria in the Guidelines to the 
Regulatory Flexibility Act of 1980, as shown above. Further information 
on the initial RFA is available in the background information package 
(see SUPPLEMENTARY INFORMATION section).

E. Small Business Regulatory Enforcement Fairness Act of 1996 (SBREFA)

    The SBREFA Subtitle D requires more rigorous regulatory flexibility 
analyses. It also requires the EPA to undertake a small entity 
stakeholder process involving the Small Business Administration (SBA) 
and the OMB prior to proposing a rule for which a regulatory 
flexibility analysis is required. In addition, it subjects agency 
compliance with many aspects of the amended Regulatory Flexibility Act 
(RFA) to judicial rule. Subtitle D of the SBREFA takes effect to 
rulemakings proposed as of June 28, 1996. Therefore, it does not apply 
to this rulemaking.
    Subtitle E of SBREFA establishes opportunity for Congress to review 
and potentially disapprove nonmajor rules promulgated on or after March 
29, 1996. With limited exceptions, it provides that no rule promulgated 
on or after March 29, 1996, may take effect until it is submitted to 
Congress and the Comptroller General along with specified supporting 
documentation. Different requirements apply to major rules. This rule, 
which is nonmajor, is being submitted to Congress in accordance with 
these requirements.

[[Page 48229]]

F. Unfunded Mandates

    Under section 202 of the Unfunded Mandates Reform Act of 1995 
(``Unfunded Mandates Act''), signed into law on March 22, 1995, the EPA 
must prepare a budgetary impact statement to accompany any proposed or 
final standards that include a Federal mandate that may result in 
estimated costs to State, local, or tribal governments in the 
aggregate, or to the private sector, of $100 million or more. Under 
section 205, the EPA must select the most cost effective and least 
burdensome alternative that achieves the objectives of the standards 
and is consistent with statutory requirements. Section 203 requires the 
EPA to establish a plan for informing and advising any small 
governments that may be significantly or uniquely impacted by the 
standards.
    The EPA has determined that the final standards do not include a 
Federal mandate that may result in estimated costs of $100 million or 
more to either State, local, or tribal governments in the aggregate, or 
to the private sector. Therefore, the requirements of the Unfunded 
Mandates Act do not apply to this section.

List of Subjects

40 CFR Part 9

    Reporting and recordkeeping requirements.

40 CFR Part 63

    Air pollution control, Hazardous substances, Reporting and 
recordkeeping requirements.

    Dated: May 15, 1996.
Carol M. Browner,
Administrator.
    For the reasons set out in the preamble, parts 9 and 63 of title 
40, chapter I of the Code of Federal Regulations are amended as 
follows:

PART 9--[AMENDED]

    1. The authority citation for part 9 continues to read as follows:

    Authority: 7 U.S.C. 135 et seq., 136-136y; 15 U.S.C. 2001, 2003, 
2005, 2006, 2601-2671; 21 U.S.C. 331j, 346a, 348; 31 U.S.C. 9701; 33 
U.S.C. 1251 et seq., 1311, 1313d, 1314, 1318, 1321, 1326, 1330, 
1342, 1344, 1345 (d) and (e), 1361; E.O. 11735, 38 FR 21243, 3 CFR, 
1971-1975 Comp. p. 973; 42 U.S.C. 241, 242b, 243, 246, 300f, 300g, 
300g-1, 300g-2, 300g-3, 300g-4, 300g-5, 300g-6, 300j-1, 300j-2, 
300j-3, 300j-4, 300j-9, 1857 et seq., 6901-6992k, 7401-7671q, 7542, 
9601-9657, 11023, 11048.

    2. Section 9.1 is amended by adding the new entries to the table 
under the indicated heading in numerical order to read as follows:


Sec. 9.1  OMB approvals under the Paperwork Reduction Act.

* * * * *

------------------------------------------------------------------------
                                                             OMB control
                      40 CFR citation                            No.    
------------------------------------------------------------------------
                                                                        
                  *        *        *        *        *                 
   National Emission Standards for Hazardous Air Pollutants for Source  
                             Categories \3\                             
                                                                        
63.1311....................................................    2060-0351
63.1314....................................................    2060-0351
63.1315....................................................    2060-0351
63.1319....................................................    2060-0351
63.1320....................................................    2060-0351
63.1325-1332...............................................    2060-0351
63.1335....................................................    2060-0351
------------------------------------------------------------------------
\3\ The ICRs referenced in this section of the table encompass the      
  applicable general provisions contained in 40 CFR part 63, subpart A, 
  which are not independent information collection requirements.        

* * * * *

PART 63--NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS 
FOR SOURCE CATEGORIES

    1. The authority citation for part 63 continues to read as follows:

    Authority: 42 U.S.C. 7401, et seq.

    2. Part 63 is amended by adding subpart JJJ to read as follows:
Subpart JJJ--National Emission Standards for Hazardous Air Pollutant 
Emissions: Group IV Polymers and Resins
Secs.
63.1310  Applicability and designation of affected sources.
63.1311  Compliance schedule and relationship to existing applicable 
rules.
63.1312  Definitions.
63.1313  Emission standards.
63.1314  Storage vessel provisions.
63.1315  Continuous process vents provisions.
63.1316  PET and polystyrene continuous process affected sources--
emissions control provisions.
63.1317  PET and polystyrene continuous process affected sources--
monitoring provisions.
63.1318  PET and polystyrene continuous process affected sources--
testing and compliance demonstration provisions.
63.1319  PET and polystyrene continuous process affected sources--
recordkeeping provisions.
63.1320  PET and polystyrene continuous process affected sources--
reporting provisions.
63.1321  Batch process vents provisions.
63.1322  Batch process vents--reference control technology.
63.1323  Batch process vents--methods and procedures for group 
determination.
63.1324  Batch process vents--monitoring provisions.
63.1325  Batch process vents--performance test methods and 
procedures to determine compliance.
63.1326  Batch process vents--recordkeeping provisions.
63.1327  Batch process vents--reporting provisions.
63.1328  Heat exchange systems provisions.
63.1329  Process contact cooling towers provisions.
63.1330  Wastewater provisions.
63.1331  Equipment leak provisions.
63.1332  Emissions averaging provisions.
63.1333  Additional test methods and procedures.
63.1334  Parameter monitoring levels and excursions.
63.1335  General recordkeeping and reporting provisions.

Subpart JJJ--National Emission Standards for Hazardous Air 
Pollutant Emissions: Group IV Polymers and Resins


Sec. 63.1310  Applicability and designation of affected sources.

    (a) Definition of affected source. The provisions of this subpart 
apply to each affected source. An affected source is either an existing 
affected source or a new affected source. Existing affected source is 
defined in paragraph (a)(6) of this section, and new affected source is 
defined in paragraph (a)(7) of this section. The affected source also 
includes the emission points and equipment specified in paragraphs 
(a)(1) through (a)(5) of this section that are associated with each 
group of TPPU.
    (1) Each wastewater stream.
    (2) Each wastewater operation.
    (3) Each heat exchange system.
    (4) Each process contact cooling tower used in the manufacture of 
PET that is associated with a new affected source.
    (5) Each process contact cooling tower used in the manufacture of 
PET using a continuous terephthalic acid high viscosity multiple end 
finisher process that is associated with an existing affected source.
    (6) Except as specified in paragraphs (b) through (d) of this 
section, an existing affected source is defined as each group of one or 
more thermoplastic product process units (TPPUs) that is not part of a 
new affected source as defined in paragraph (a)(7) of this section, 
that is manufacturing the same primary product, where each TPPU uses as 
a reactant, or uses as a process solvent, or produces as a by-product 
or co-product any organic hazardous air pollutant (organic HAP), and 
that is located at a plant site that is a major source.
    (7) Except as specified in paragraphs (b) through (d) of this 
section, a new affected source is defined as a source meeting the 
criteria of paragraph (a)(7)(i), (a)(7)(ii), or (a)(7)(iii) of this 
section:

[[Page 48230]]

    (i) At a plant site previously without HAP emissions points, each 
group of one or more TPPUs manufacturing the same primary product that 
is part of a major source on which construction commenced after March 
29, 1995;
    (ii) A TPPU meeting the criteria in paragraph (i)(1)(i) of this 
section; or
    (iii) A reconstructed affected source meeting the criteria in 
paragraph (i)(2)(i) of this section.
    (b) TPPUs exempted from the affected source. For a TPPU to be 
excluded from the designation of affected source due to the fact that 
it does not use as a reactant, or use as a process solvent, or produce 
as a by-product or co-product any organic HAP, the owner or operator 
shall comply with the requirements of paragraph (b)(1) of this section 
and shall comply with the requirements of paragraph (b)(2) of this 
section if requested to do so by the Administrator.
    (1) Retain information, data, and analysis used to document the 
basis for the determination that the TPPU does not use as a reactant or 
use as a process solvent, or manufacture as a by-product or a co-
product any organic HAP. Types of information that could document this 
determination include, but are not limited to, records of chemicals 
purchased for the process, analyses of process stream composition, or 
engineering calculations.
    (2) When requested by the Administrator, demonstrate that the TPPU 
does not use as a reactant, or use as a process solvent, or manufacture 
as a by-product or co-product any organic HAP.
    (c) Emission points exempted from the affected source. The affected 
source does not include the emission points listed in paragraphs (c)(1) 
through (c)(6) of this section:
    (1) Stormwater from segregated sewers;
    (2) Water from fire-fighting and deluge systems in segregated 
sewers;
    (3) Spills;
    (4) Water from safety showers;
    (5) Vessels and equipment storing and/or handling material that 
contain no organic HAP and/or organic HAP as impurities only; and
    (6) Equipment that is intended to operate in organic HAP service 
for less than 300 hours during the calendar year.
    (d) Processes exempted from the affected source. The processes 
specified in paragraphs (d)(1) through (d)(5) of this section are 
exempted from the affected source:
    (1) Research and development facilities;
    (2) Polymerization processes occurring in a mold;
    (3) Processes which manufacture binder systems containing a 
thermoplastic product for paints, coatings, or adhesives;
    (4) Finishing processes including equipment such as compounding 
units, spinning units, drawing units, extruding units, and other 
finishing steps; and
    (5) Solid state polymerization processes.
    (e) Applicability determination of nonthermoplastic equipment 
included in a TPPU producing a thermoplastic product. If a polymer that 
is not subject to this subpart is produced within the equipment (i.e., 
collocated) making up a TPPU and at least 50 percent of said polymer is 
used in the production of a thermoplastic product manufactured by said 
TPPU, the unit operations involved in the production of said polymer 
are considered part of the TPPU and are subject to this rule except as 
specified in this paragraph (e). If said unit operations are subject to 
another MACT standard regulating the same emission points, said unit 
operations are not subject to this subpart.
    (f) Primary product determination and applicability. The primary 
product of a process unit shall be determined according to the 
procedures specified in paragraphs (f)(1) through (f)(2) of this 
section. Paragraphs (f)(3) through (f)(4) of this section describe 
whether or not a process unit is subject to this subpart. Paragraphs 
(f)(5) through (f)(7) of this section discuss compliance for those 
TPPUs operated as flexible operation units, as specified in paragraph 
(f)(2) of this section.
    (1) If a process unit only manufactures one product, then that 
product shall represent the primary product of the process unit.
    (2) If a process unit is designed and operated as a flexible 
operation unit, the primary product shall be determined as specified in 
paragraphs (f)(2)(i) or (f)(2)(ii) of this section based on the 
anticipated operations for the 5 years following September 12, 1996 for 
existing affected sources and for the first 5 years after initial 
start-up for new affected sources.
    (i) If the flexible operation unit will manufacture one product for 
the greatest operating time over the five year period, then that 
product shall represent the primary product of the flexible operation 
unit.
    (ii) If the flexible operation unit will manufacture multiple 
products equally based on operating time, then the product with the 
greatest production on a mass basis over the five year period shall 
represent the primary product of the flexible operation unit.
    (3) If the primary product of a process unit is a thermoplastic 
product, then said process unit is considered a TPPU. If said TPPU 
meets all the criteria of paragraph (a) of this section, it is either 
an affected source or is part of an affected source comprised of other 
TPPU subject to this rule at the same plant site with the same primary 
product. The status of a process unit as a TPPU and as an affected 
source or part of an affected source shall not change regardless of 
what products are produced in the future by said TPPU, with the 
exception noted in paragraph (f)(3)(i) of this section.
    (i) If a process unit terminates the production of all 
thermoplastic products and does not anticipate the production of any 
thermoplastic product in the future, the process unit is no longer a 
TPPU and is not subject to this rule after notification is made as 
specified in paragraph (f)(3)(ii) of this section.
    (ii) The owner or operator of a process unit that wishes to remove 
the TPPU designation from the process unit, as specified in paragraph 
(f)(3)(i) of this section, shall notify the Administrator. This 
notification shall be accompanied by rationale for why it is 
anticipated that no thermoplastic products will be produced in the 
process unit in the future.
    (iii) If a process unit meeting the criteria of paragraph (f)(3)(i) 
of this section begins the production of a thermoplastic product in the 
future, the owner or operator shall use the procedures in paragraph 
(f)(4)(i) of this section to determine if the process unit is re-
designated as a TPPU.
    (4) If the primary product of a process unit is not a thermoplastic 
product, then said process unit is not an affected source nor is it 
part of any affected source subject to this rule. Said process unit is 
not subject to this rule at any time, regardless of what product is 
being produced. The status of a process unit as not being a TPPU, and 
therefore not an affected source nor part of an affected source subject 
to this subpart, shall not change regardless of what products are 
produced in the future by said TPPU, with the exception noted in 
paragraph (f)(4)(i) of this section.
    (i) If, at any time beginning September 12, 2001, the owner or 
operator determines that a thermoplastic product is the primary product 
for the process unit based on actual production data for any preceding 
consecutive five-year period, then the process unit shall be designated 
as a TPPU. If said TPPU meets all the criteria of paragraph (a) of this 
section and is not subject to another subpart of 40 CFR part 63, it is 
either an affected source or part of an affected source and shall be 
subject to this rule.
    (ii) If a process unit meets the criteria of paragraph (f)(4)(i) of 
this section, the

[[Page 48231]]

owner or operator shall notify the Administrator within 6 months of 
making this determination. The TPPU, as the entire affected source or 
part of an affected source, shall be in compliance with the provisions 
of this rule within 3 years from the date of such notification.
    (iii) If a process unit is re-designated as a TPPU but does not 
meet all the criteria of paragraph (a) of this section, the owner or 
operator shall notify the Administrator within 6 months of making this 
determination. Said notification shall include documentation justifying 
the TPPU's status as not being an affected source or not being part of 
an affected source.
    (5) Once the primary product of a process unit has been determined 
to be a thermoplastic product and it has been determined that all the 
criteria of paragraph (a) of this section are met for said TPPU, the 
owner or operator of the affected source shall comply with the 
standards for the primary product. Owners or operators of flexible 
operation units shall comply with the standards for the primary product 
as specified in either paragraph (f)(5)(i) or (f)(5)(ii) of this 
section, except as specified in paragraph (f)(5)(iii) of this section.
    (i) Each owner or operator shall determine the group status of each 
emission point that is part of said flexible operation unit based on 
emission point characteristics when the primary product is being 
manufactured. Based on this finding, the owner or operator shall comply 
with the applicable standards for the primary product for each emission 
point, as appropriate, at all times, regardless of what product is 
being produced.
    (ii) Alternatively, each owner or operator shall determine the 
group status of each emission point that is part of said flexible 
operation unit based on the emission point characteristics when each 
product produced by the flexible operation unit is manufactured, 
regardless of whether said product is a thermoplastic product or not. 
Based on these findings, the owner or operator shall comply with the 
applicable standards for the primary product for each emission point, 
as appropriate, regardless of what product is being produced.

    Note: Under this scenario it is possible that the group status, 
and therefore the requirement to achieve emission reductions, for an 
emission point may change depending on the product being produced.

    (iii) Whenever a flexible operation unit manufactures a product 
that meets the criteria of paragraph (b) of this section (i.e., does 
not use or produce any organic HAP), all activities associated with the 
manufacture of said product shall be exempt from the requirements of 
this rule, to include the operation and monitoring of control or 
recovery devices.
    (6) The determination of the primary product for a process unit, to 
include the determination of applicability of this subpart to process 
units that are designed and operated as flexible operation units, shall 
be reported in the Notification of Compliance Status required by 
Sec. 63.1335(e)(5) when the primary product is determined to be a 
thermoplastic product. The Notification of Compliance Status shall 
include the information specified in either paragraph (f)(6)(i) or 
(f)(6)(ii) of this section. If the primary product is determined to be 
something other than a thermoplastic product, the owner or operator 
shall retain information, data, and analysis used to document the basis 
for the determination that the primary product is not a thermoplastic 
product.
    (i) If the TPPU manufactures only one thermoplastic product, 
identification of said thermoplastic product.
    (ii) If the TPPU is designed and operated as a flexible operation 
unit, the information specified in paragraphs (f)(6)(ii)(A) through 
(f)(6)(ii)(C) of this section, as appropriate.
    (A) Identification of the primary product.
    (B) Information concerning operating time and/or production mass 
for each product that was used to make the determination of the primary 
product under paragraph (f)(2)(i) or (f)(2)(ii) of this section.
    (C) Identification of which compliance option, either paragraph 
(f)(5)(i) or (f)(5)(ii) of this section, has been selected by the owner 
or operator.
    (7) To demonstrate compliance with the rule during those periods 
when a flexible operation unit that is subject to this subpart is 
producing a product other than a thermoplastic product or is producing 
a thermoplastic product that is not the primary product, the owner or 
operator shall comply with either paragraphs (f)(7)(i) through 
(f)(7)(ii) or paragraph (f)(7)(iii) of this section.
    (i) Establish parameter monitoring levels, as specified in 
Sec. 63.1334, for those emission points designated as Group 1, as 
appropriate.
    (ii) Submit the parameter monitoring levels developed under 
paragraph (f)(7)(i) of this section and the basis for them in the 
Notification of Compliance Status report as specified in 
Sec. 63.1335(e)(5).
    (iii) Demonstrate that the parameter monitoring levels established 
for the primary product are also appropriate for those periods when 
products other than the primary product are being produced. Material 
demonstrating this finding shall be submitted in the Notification of 
Compliance Status report as specified in Sec. 63.1335(e)(5).
    (g) Storage vessel ownership determination. The owner or operator 
shall follow the procedures specified in paragraphs (g)(1) through 
(g)(8) of this section to determine to which process unit a storage 
vessel shall belong.
    (1) If a storage vessel is already subject to another subpart of 40 
CFR part 63 on September 12, 1996, said storage vessel shall belong to 
the process unit subject to the other subpart.
    (2) If a storage vessel is dedicated to a single process unit, the 
storage vessel shall belong to that process unit.
    (3) If a storage vessel is shared among process units, then the 
storage vessel shall belong to that process unit located on the same 
plant site as the storage vessel that has the greatest input into or 
output from the storage vessel (i.e., said process unit has the 
predominant use of the storage vessel).
    (4) If predominant use cannot be determined for a storage vessel 
that is shared among process units and if one of those process units is 
a TPPU subject to this subpart, the storage vessel shall belong to said 
TPPU.
    (5) If predominant use cannot be determined for a storage vessel 
that is shared among process units and if more than one of the process 
units are TPPUs that have different primary products and that are 
subject to this subpart, then the owner or operator shall assign the 
storage vessel to any one of the said TPPUs.
    (6) If the predominant use of a storage vessel varies from year to 
year, then predominant use shall be determined based on the utilization 
that occurred during the year preceding September 12, 1996 or based on 
the expected utilization for the 5 years following September 12, 1996 
for existing affected sources, whichever is more representative of the 
expected operations for said storage vessel, and based on the first 5 
years after initial start-up for new affected sources. The 
determination of predominant use shall be reported in the Notification 
of Compliance Status required by Sec. 63.1335(e)(5). If the predominant 
use changes, the redetermination of predominant use shall be reported 
in the next Periodic Report.
    (7) If the storage vessel begins receiving material from (or 
sending material to) another process unit; or ceasing to receive 
material from (or send material to) a process unit; or if the

[[Page 48232]]

applicability of this subpart to a storage vessel has been determined 
according to the provisions of paragraphs (g)(1) through (g)(6) of this 
section and there is a significant change in the use of the storage 
vessel that could reasonably change the predominant use, the owner or 
operator shall reevaluate the applicability of this subpart to the 
storage vessel.
    (8) Where a storage vessel is located at a major source that 
includes one or more process units which place material into, or 
receive materials from the storage vessel, but the storage vessel is 
located in a tank farm, the applicability of this subpart shall be 
determined according to the provisions in paragraphs (g)(8)(i) through 
(g)(8)(iv) of this section.
    (i) The storage vessel may only be assigned to a process unit that 
utilizes the storage vessel and does not have an intervening storage 
vessel for that product (or raw materials, as appropriate). With 
respect to any process unit, an intervening storage vessel means a 
storage vessel connected by hard-piping to the process unit and to the 
storage vessel in the tank farm so that product or raw material 
entering or leaving the process unit flows into (or from) the 
intervening storage vessel and does not flow directly into (or from) 
the storage vessel in the tank farm.
    (ii) If there is no process unit at the major source that meets the 
criteria of paragraph (g)(8)(i) of this section with respect to a 
storage vessel, this subpart does not apply to the storage vessel.
    (iii) If there is only one process unit at the major source that 
meets the criteria of paragraph (g)(8)(i) of this section with respect 
to a storage vessel, the storage vessel shall be assigned to that 
process unit.
    (iv) If there are two or more process units at the major source 
that meet the criteria of paragraph (g)(8)(i) of this section with 
respect to a storage vessel, the storage vessel shall be assigned to 
one of those process units according to the provisions of paragraph 
(g)(7) of this section. The predominant use shall be determined among 
only those thermoplastic product process units that meet the criteria 
of paragraph (g)(8)(i) of this section.
    (h) Recovery operation equipment ownership determination. The owner 
or operator shall follow the procedures specified in paragraphs (h)(1) 
through (h)(7) of this section to determine to which process unit 
recovery operation equipment shall belong.
    (1) If recovery operation equipment is already subject to another 
subpart of 40 CFR part 63 on September 12, 1996, said recovery 
operation equipment shall belong to the process unit subject to the 
other subpart.
    (2) If recovery operation equipment is used exclusively by a single 
process unit, the recovery operation shall belong to that process unit.
    (3) If recovery operation equipment is shared among process units, 
then the recovery operation equipment shall belong to that process unit 
located on the same plant site as the recovery operation equipment that 
has the greatest input into or output from the recovery operation 
equipment (i.e., said process unit has the predominant use of the 
recovery operation equipment).
    (4) If predominant use cannot be determined for recovery operation 
equipment that is shared among process units and if one of those 
process units is a TPPU subject to this subpart, the recovery operation 
equipment shall belong to said TPPU.
    (5) If predominant use cannot be determined for recovery operation 
equipment that is shared among process units and if more than one of 
the process units are TPPUs that have different primary products and 
that are subject to this subpart, then the owner or operator shall 
assign the recovery operation equipment to any one of said TPPUs.
    (6) If the predominant use of recovery operation equipment varies 
from year to year, then predominant use shall be determined based on 
the utilization that occurred during the year preceding September 12, 
1996 or based on the expected utilization for the 5 years following 
September 12, 1996 for existing affected sources, whichever is the more 
representative of the expected operations for said recovery operations 
equipment, and based on the first 5 years after initial start-up for 
new affected sources. This determination shall be reported in the 
Notification of Compliance Status required by Sec. 63.1335(e)(5). If 
the predominant use changes, the redetermination of predominant use 
shall be reported in the next Periodic Report.
    (7) If there is an unexpected change in the utilization of recovery 
operation equipment that could reasonably change the predominant use, 
the owner or operator shall redetermine to which process unit the 
recovery operation belongs by reperforming the procedures specified in 
paragraphs (h)(2) through (h)(6) of this section.
    (i) Changes or additions to plant sites. The provisions of 
paragraphs (i)(1) through (i)(4) of this section apply to owners or 
operators that change or add to their plant site or affected source. 
Paragraph (i)(5) of this section provides examples of what are and are 
not considered process changes for purposes of paragraph (i) of this 
section.
    (1) Adding a TPPU to a plant site. The provisions of paragraphs 
(i)(1)(i) through (i)(1)(ii) of this section apply to owners or 
operators that add TPPUs to a plant site.
    (i) If a TPPU is added to a plant site, said addition shall be a 
new affected source and shall be subject to the requirements for a new 
affected source in this subpart upon initial start-up or by September 
12, 1996, whichever is later, if said addition meets the criteria 
specified in paragraphs (i)(1)(i)(A) through (i)(1)(i)(B) and either 
(i)(1)(i)(C) or (i)(1)(i)(D) of this section:
    (A) Said addition meets the definition of construction in 
Sec. 63.2;
    (B) Such construction commenced after March 29, 1995; and
    (C) Said addition has the potential to emit 10 tons per year or 
more of any HAP or 25 tons per year or more of any combination of HAP, 
and the primary product of said addition is currently produced at the 
plant site as the primary product of an affected source; or
    (D) The primary product of said addition is not currently produced 
at the plant site as the primary product of an affected source and the 
plant site meets, or after the addition is completed will meet, the 
definition of major source.
    (ii) If a TPPU is added to a plant site, said addition shall be 
subject to the requirements for an existing affected source in this 
subpart upon initial start-up or by 3 years after September 12, 1996, 
whichever is later, if said addition does not meet the criteria 
specified in paragraph (i)(1)(i) of this section and the plant site 
meets, or after the addition is completed will meet, the definition of 
major source.
    (2) Adding emission points or making process changes to existing 
affected sources. The provisions of paragraphs (i)(2)(i) through 
(i)(2)(ii) of this section apply to owners or operators that add 
emission points or make process changes to an existing affected source.
    (i) If any process change is made or emission point is added to an 
existing affected source, or if a process change creating one or more 
additional Group 1 emission point(s) is made to an existing affected 
source, said affected source shall be a new affected source and shall 
be subject to the requirements for a new affected source in this 
subpart upon initial start-up or by September 12, 1996, whichever is 
later, if said process change or addition meets the criteria specified 
in paragraphs (i)(2)(i)(A) through (i)(2)(i)(B) of this section:

[[Page 48233]]

    (A) Said process change or addition meets the definition of 
reconstruction in Sec. 63.2; and
    (B) Such reconstruction commenced after March 29, 1995.
    (ii) If any process change is made or emission point is added to an 
existing affected source, or if a process change creating one or more 
additional Group 1 emission point(s) is made to an existing affected 
source and said process change or addition does not meet the criteria 
specified in paragraphs (i)(2)(i)(A) through (i)(2)(i)(B) of this 
section, the resulting emission point(s) shall be subject to the 
requirements for an existing affected source in this subpart. Said 
emission point(s) shall be in compliance upon initial start-up or by 3 
years after September 12, 1996, whichever is later, unless the owner or 
operator demonstrates to the Administrator that achieving compliance 
will take longer than making said process change or addition. If this 
demonstration is made to the Administrator's satisfaction, the owner or 
operator shall follow the procedures in paragraphs (i)(2)(iii)(A) 
through (i)(2)(iii)(C) of this section to establish a compliance date.
    (iii) To establish a compliance date for an emission point or 
points specified in paragraph (i)(2)(ii) of this section, the 
procedures specified in paragraphs (i)(2)(iii)(A) through 
(i)(2)(iii)(C) of this section shall be followed.
    (A) The owner or operator shall submit to the Administrator for 
approval a compliance schedule, along with a justification for the 
schedule.
    (B) The compliance schedule shall be submitted within 180 days 
after the process change or addition is made or the information 
regarding said change or addition is known to the owner or operator, 
unless the compliance schedule has been previously submitted to the 
permitting authority. The compliance schedule may be submitted in the 
next Periodic Report if the process change or addition is made after 
the date the Notification of Compliance Status report is due.
    (C) The Administrator shall approve the compliance schedule or 
request changes within 120 calendar days of receipt of the compliance 
schedule and justification.
    (3) Existing source requirements for Group 2 emission points that 
become Group 1 emission points. If a process change or addition that 
does not meet the criteria in paragraph (i)(1) or (i)(2) of this 
section is made to an existing plant site or existing affected source, 
and the change causes a Group 2 emission point to become a Group 1 
emission point, for said emission point, the owner or operator shall 
comply with the requirements of this subpart for existing Group 1 
emission points. Compliance shall be achieved as expeditiously as 
practicable, but in no event later than 3 years after said emission 
point becomes a Group 1 emission point.
    (4) Existing source requirements for some emission points that 
become subject to the requirements of subpart H of this part. If a 
compressor becomes subject to Sec. 63.164, the owner or operator shall 
be in compliance upon initial start-up or by 3 years after September 
12, 1996, whichever is later, unless the owner or operator demonstrates 
to the Administrator that achieving compliance will take longer than 
making the change. If this demonstration is made to the Administrator's 
satisfaction, the owner or operator shall follow the procedures in 
paragraphs (i)(2)(iii)(A) through (i)(2)(iii)(C) of this section to 
establish a compliance date.
    (5) Determining what are and are not process changes. For purposes 
of paragraph (i) of this section, examples of process changes include, 
but are not limited to, changes in production capacity, feedstock type, 
or catalyst type, or whenever there is a replacement, removal, or the 
addition of recovery equipment. For purposes of paragraph (i) of this 
section, process changes do not include: process upsets, unintentional 
temporary process changes, and changes that are within the equipment 
configuration and operating conditions documented in the Notification 
of Compliance Status report required by Sec. 63.1335(e)(5).
    (j) Applicability of this subpart except during periods of start-
up, shutdown, and malfunction. Each provision set forth in this subpart 
or referred to in this subpart shall apply at all times except during 
periods of start-up, shutdown, and malfunction if the start-up, 
shutdown, or malfunction precludes the ability of a particular emission 
point of an affected source to comply with one or more specific 
provisions to which it is subject. Start-up, shutdown, and malfunction 
is defined in Sec. 63.1312 for all emission points except equipment 
leaks subject to subpart H of this part, which shall follow the 
provisions for periods of start-up, malfunction, and process unit 
shutdown, as defined in Sec. 63.161. Only then shall an emission point 
not be required to comply with all applicable provisions of this 
subpart.


Sec. 63.1311  Compliance schedule and relationship to existing 
applicable rules.

    (a) Affected sources are required to achieve compliance on or 
before the dates specified in paragraphs (b) through (d) of this 
section. Paragraph (e) of this section provides information on 
requesting compliance extensions. Paragraphs (f) through (l) of this 
section discuss the relationship of this subpart to subpart A of this 
part and to other applicable rules. Where an override of another 
authority of the Act is indicated in this subpart, only compliance with 
the provisions of this subpart is required. Paragraph (m) of this 
section specifies the meaning of time periods.
    (b) New affected sources that commence construction or 
reconstruction after March 29, 1995 shall be in compliance with this 
subpart upon initial start-up or September 12, 1996, whichever is 
later, as provided in Sec. 63.6(b).
    (c) Existing affected sources shall be in compliance with this 
subpart (except for Sec. 63.1331 for which compliance is covered by 
paragraph (d) of this section) no later than 3 years after September 
12, 1996, as provided in Sec. 63.6(c), unless an extension has been 
granted as specified in paragraph (e) of this section.
    (d) Except as provided for in paragraphs (d)(1) through (d)(5) of 
this section, existing affected sources shall be in compliance with 
Sec. 63.1331 no later than March 12, 1997 unless a request for a 
compliance extension is granted pursuant to Section 112(i)(3)(B) of the 
Act, as discussed in Sec. 63.182(a)(6).
    (1) Compliance with the compressor provisions of Sec. 63.164 shall 
occur no later than September 12, 1997 for any compressor meeting one 
or more of the criteria in paragraphs (d)(1)(i) through (d)(1)(iii) of 
this section if the work can be accomplished without a process unit 
shutdown, as defined in Sec. 63.161:
    (i) The seal system will be replaced;
    (ii) A barrier fluid system will be installed; or
    (iii) A new barrier fluid will be utilized which requires changes 
to the existing barrier fluid system.
    (2) Compliance with the compressor provisions of Sec. 63.164 shall 
occur no later than February 12, 1998 for any compressor meeting all 
the criteria in paragraphs (d)(2)(i) through (d)(2)(ii) of this 
section:
    (i) The compressor meets one or more of the criteria specified in 
paragraphs (d)(1)(i)(A) through (d)(1)(i)(B) of this section:
    (A) The work can be accomplished without a process unit shutdown as 
defined in Sec. 63.161; or
    (B) The additional time is actually necessary due to the 
unavailability of parts beyond the control of the owner or operator.
    (ii) The owner or operator submits the request for a compliance 
extension to the Environmental Protection Agency

[[Page 48234]]

(EPA) Regional Office at the addresses listed in Sec. 63.13 no later 
than 45 calendar days before March 12, 1997. The request for a 
compliance extension shall contain the information specified in 
Sec. 63.6(i)(6)(i) (A), (B), and (D). Unless the EPA Regional Office 
objects to the request for a compliance extension within 30 calendar 
days after receipt of the request, the request shall be deemed 
approved.
    (3) If compliance with the compressor provisions of Sec. 63.164 
cannot reasonably be achieved without a process unit shutdown, as 
defined in Sec. 63.161, the owner or operator shall achieve compliance 
no later than September 14, 1998. The owner or operator who elects to 
use this provision shall submit a request for a compliance extension in 
accordance with the requirements of paragraph (d)(2)(ii) of this 
section.
    (4) If compliance with the compressor provisions of Sec. 63.164 
cannot be achieved without replacing the compressor or recasting the 
distance piece, the owner or operator shall achieve compliance no later 
than September 13, 1999. The owner or operator who elects to use this 
provision shall submit a request for a compliance extension in 
accordance with the requirements of paragraph (d)(2)(ii) of this 
section.
    (5) Compliance with the provisions of Sec. 63.170 shall occur no 
later than September 13, 1999.
    (e) Pursuant to section 112(i)(3)(B) of the Act, an owner or 
operator may request an extension allowing the existing source up to 1 
additional year to comply with section 112(d) standards. For purposes 
of this subpart, a request for an extension shall be submitted to the 
operating permit authority as part of the operating permit application 
or to the Administrator as a separate submittal or as part of the 
Precompliance Report. Requests for extensions shall be submitted no 
later than the date the Precompliance Report is required to be 
submitted in Sec. 63.1335(e)(3)(i). The dates specified in Sec. 63.6(i) 
for submittal of requests for extensions shall not apply to this 
subpart.
    (1) A request for an extension of compliance shall include the data 
described in Sec. 63.6(i)(6)(i) (A),(B), and (D).
    (2) The requirements in Sec. 63.6(i)(8) through Sec. 63.6(i)(14) 
shall govern the review and approval of requests for extensions of 
compliance with this subpart.
    (f) Table 1 of this subpart specifies the provisions of subpart A 
of this part that apply and those that do not apply to owners and 
operators of affected sources subject to this subpart.
    (g)(1) After the compliance dates specified in this section, an 
affected source subject to this subpart that is also subject to the 
provisions of subpart I of this part, is required to comply only with 
the provisions of this subpart. After the compliance dates specified in 
this section, said affected source shall no longer be subject to 
subpart I of this part.
    (2) Said affected sources that elected to comply with subpart I of 
this part through a quality improvement program, as specified in 
Sec. 63.175 or Sec. 63.176 or both, may elect to continue these 
programs without interruption as a means of complying with this 
subpart. In other words, becoming subject to this subpart does not 
restart or reset the ``compliance clock'' as it relates to reduced 
burden earned through a quality improvement program.
    (h) After the compliance dates specified in this section, a storage 
vessel that belongs to an affected source subject to this subpart that 
is also subject to the provisions of 40 CFR part 60, subpart Kb, is 
required to comply only with the provisions of this subpart. After the 
compliance dates specified in this section, said storage vessel shall 
no longer be subject to 40 CFR part 60, subpart Kb.
    (i)(1) Except as provided in paragraph (i)(2) of this section, 
after the compliance dates specified in this section, affected sources 
producing PET using a continuous terephthalic acid process, producing 
PET using a continuous dimethyl terephthalate process, or producing 
polystyrene resin using a continuous process subject to this subpart 
that are also subject to the provisions of 40 CFR part 60, subpart DDD, 
are required to comply only with the provisions of this subpart. After 
the compliance dates specified in this section, said sources shall no 
longer be subject to 40 CFR part 60, subpart DDD.
    (2) Existing affected sources producing PET using a continuous 
terephthalic acid high viscosity multiple end finisher process shall 
continue to be subject to 40 CFR 60.562-1(c)(2)(ii)(C). Once said 
affected source becomes subject to and achieves compliance with 
Sec. 63.1329(c) of this subpart, said affected source is no longer 
subject to the provisions of 40 CFR part 60, subpart DDD.
    (j) Affected sources subject to this subpart that are also subject 
to the provisions of subpart Q of this part shall comply with both 
subparts.
    (k) After the compliance dates specified in this section, an 
affected source subject to this subpart that is also subject to the 
provisions of 40 CFR part 60, subpart VV, is required to comply only 
with the provisions of this subpart. After the compliance dates 
specified in this section, said source shall no longer be subject to 40 
CFR part 60, subpart VV.
    (l) After the compliance dates specified in this section, a 
distillation operation that belongs to an affected source subject to 
this subpart that is also subject to the provisions of 40 CFR part 60, 
subpart NNN, is required to comply only with the provisions of this 
subpart. After the compliance dates specified in this section, said 
distillation operation shall no longer be subject to 40 CFR part 60, 
subpart NNN.
    (m) All terms in this subpart that define a period of time for 
completion of required tasks (e.g., weekly, monthly, quarterly, 
annual), unless specified otherwise in the section or subsection that 
imposes the requirement, refer to the standard calendar periods.
    (1) Notwithstanding time periods specified in this subpart for 
completion of required tasks, such time periods may be changed by 
mutual agreement between the owner or operator and the Administrator, 
as specified in subpart A of this part (e.g., a period could begin on 
the compliance date or another date, rather than on the first day of 
the standard calendar period). For each time period that is changed by 
agreement, the revised period shall remain in effect until it is 
changed. A new request is not necessary for each recurring period.
    (2) Where the period specified for compliance is a standard 
calendar period, if the initial compliance date occurs after the 
beginning of the period, compliance shall be required according to the 
schedule specified in paragraphs (m)(i) or (m)(ii) of this section, as 
appropriate.
    (i) Compliance shall be required before the end of the standard 
calendar period within which the compliance deadline occurs, if there 
remain at least 3 days for tasks that must be performed weekly, at 
least 2 weeks for tasks that must be performed monthly, at least 1 
month for tasks that must be performed each quarter, or at least 3 
months for tasks that must be performed annually; or
    (ii) In all other cases, compliance shall be required before the 
end of the first full standard calendar period after the period within 
which the initial compliance deadline occurs.
    (3) In all instances where a provision of this subpart requires 
completion of a task during each multiple successive period, an owner 
or operator may perform the required task at any time during the 
specified period, provided

[[Page 48235]]

that the task is conducted at a reasonable interval after completion of 
the task during the previous period.


Sec. 63.1312  Definitions.

    (a) The following terms used in this subpart shall have the meaning 
given them in Sec. 63.2, Sec. 63.101, Sec. 63.111, and Sec. 63.161 as 
specified after each term:
Act (Sec. 63.2)
Administrator (Sec. 63.2)
Automated monitoring and recording system (Sec. 63.111)
Average concentration (Sec. 63.111)
Boiler (Sec. 63.111)
Bottoms receiver (Sec. 63.161)
By compound (Sec. 63.111)
By-product (Sec. 63.101)
Car-seal (Sec. 63.111)
Chemical manufacturing process unit (Sec. 63.101)
Closed-vent system (Sec. 63.111)
Co-product (Sec. 63.101)
Combustion device (Sec. 63.111)
Commenced (Sec. 63.2)
Compliance date (Sec. 63.2)
Compliance schedule (Sec. 63.2)
Connector (Sec. 63.161)
Construction (Sec. 63.2)
Continuous monitoring system (Sec. 63.2)
Continuous record (Sec. 63.111)
Continuous recorder (Sec. 63.111)
Cover (Sec. 63.111)
Distillation unit (Sec. 63.111)
Emission standard (Sec. 63.2)
Emissions averaging (Sec. 63.2)
EPA (Sec. 63.2)
Equipment (Sec. 63.161)
Equipment leak (Sec. 63.101)
Existing source (Sec. 63.2)
External floating roof (Sec. 63.111)
Fill (Sec. 63.111)
Fixed roof (Sec. 63.111)
Flame zone (Sec. 63.111)
Flexible operation unit (Sec. 63.101)
Floating roof (Sec. 63.111)
Flow indicator (Sec. 63.111)
Group 1 wastewater streams (Sec. 63.111)
Group 2 wastewater streams (Sec. 63.111)
Halogens and hydrogen halides (Sec. 63.111)
Hazardous air pollutant (Sec. 63.2)
Impurity (Sec. 63.101)
In organic hazardous air pollutant service (Sec. 63.161)
Incinerator (Sec. 63.111)
Instrumentation system (Sec. 63.161)
Internal floating roof (Sec. 63.111)
Lesser quantity (Sec. 63.2)
Major source (Sec. 63.2)
Malfunction (Sec. 63.2)
Mass flow rate (Sec. 63.111)
Maximum true vapor pressure (Sec. 63.111)
New source (Sec. 63.2)
Open-ended valve or line (Sec. 63.161)
Operating permit (Sec. 63.101)
Organic HAP service (Sec. 63.161)
Organic monitoring device (Sec. 63.111)
Owner or operator (Sec. 63.2)
Performance evaluation (Sec. 63.2)
Performance test (Sec. 63.2)
Permitting authority (Sec. 63.2)
Plant site (Sec. 63.101)
Point of generation (Sec. 63.111)
Potential to emit (Sec. 63.2)
Primary fuel (Sec. 63.111)
Process heater (Sec. 63.111)
Process unit shutdown (Sec. 63.161)
Process wastewater (Sec. 63.101)
Process wastewater stream (Sec. 63.111)
Product separator (Sec. 63.111)
Reactor (Sec. 63.111)
Reconstruction (Sec. 63.2)
Recovery device (Sec. 63.111)
Reference control technology for process vents (Sec. 63.111)
Reference control technology for storage vessels (Sec. 63.111)
Reference control technology for wastewater (Sec. 63.111)
Relief valve (Sec. 63.111)
Research and development facility (Sec. 63.101)
Residual (Sec. 63.111)
Run (Sec. 63.2)
Secondary fuel (Sec. 63.111)
Sensor (Sec. 63.161)
Shutdown (Sec. 63.2)
Specific gravity monitoring device (Sec. 63.111)
Start-up (Sec. 63.2)
Start-up, shutdown, and malfunction plan (Sec. 63.101)
State (Sec. 63.2)
Surge control vessel (Sec. 63.161)
Temperature monitoring device (Sec. 63.111)
Test method (Sec. 63.2)
Total resource effectiveness index value (Sec. 63.111)
Treatment process (Sec. 63.111)
Unit operation (Sec. 63.101)
Visible emission (Sec. 63.2)
Waste management unit (Sec. 63.111)
Wastewater (Sec. 63.101)
Wastewater stream (Sec. 63.111)

    (b) All other terms used in this subpart shall have the meaning 
given them in this section. If a term is defined in Secs. 63.2, 63.101, 
63.111, or 63.161 and in this section, it shall have the meaning given 
in this section for purposes of this subpart.
    Acrylonitrile butadiene styrene latex resin (ABS latex) means ABS 
produced through an emulsion process, however the product is not 
coagulated or dried as typically occurs in an emulsion process.
    Acrylonitrile butadiene styrene resin (ABS) means styrenic 
terpolymers consisting primarily of acrylonitrile, 1,3-butadiene, and 
styrene monomer units. ABS is usually composed of a styrene-
acrylonitrile copolymer continuous phase with dispersed butadiene 
derived rubber.
    Acrylonitrile styrene acrylate resin (ASA) means a resin formed 
using acrylic ester-based elastomers to impact-modify styrene 
acrylonitrile resin matrices.
    Aggregate batch vent stream means a gaseous emission stream 
containing only the exhausts from two or more batch process vents that 
are ducted together before being routed to a control device that is in 
continuous operation.
    Affected source is defined in Sec. 63.1310(a).
    Alpha methyl styrene acrylonitrile resin (AMSAN) means copolymers 
consisting primarily of alpha methyl styrene and acrylonitrile.
    Average flow rate, as used in conjunction with wastewater 
provisions, is determined by the specifications in Sec. 63.144(c); or, 
as used in conjunction with batch process vent provisions, is 
determined by the specifications in Sec. 63.1323(e).
    Batch cycle means the operational step or steps, from start to 
finish, that occur as part of a batch unit operation. Batch cycle 
limitation means an enforceable restriction on the number of batch 
cycles that can be performed in a year for an individual batch process 
vent.
    Batch emission episode means a discrete emission venting episode 
associated with a single batch unit operation. Multiple batch emission 
episodes may occur from a single batch unit operation.
    Batch process means a discontinuous process involving the bulk 
movement of material through sequential manufacturing steps. Mass, 
temperature, concentration, and other properties of the process vary 
with time. Addition of raw material and withdrawal of product do not 
typically occur simultaneously in a batch process. For the purposes of 
this subpart, a process producing polymers is characterized as 
continuous or batch based on the operation of the polymerization 
reactors.
    Batch process vent means a point of emission from a batch unit 
operation having a gaseous emission stream with annual organic HAP 
emissions greater than 225 kilograms per year. Batch process vents 
exclude relief valve discharges and leaks from equipment regulated 
under Sec. 63.1331.
    Batch unit operation means a unit operation operated in a batch 
process mode.
    Compounding unit means a unit operation which blends, melts, and 
resolidifies solid polymers for the purpose of incorporating additives, 
colorants, or stabilizers into the final thermoplastic product. A unit 
operation whose primary purpose is to remove residual monomers from 
polymers is not a compounding unit.

[[Page 48236]]

    Continuous process means a process where the inputs and outputs 
flow continuously through sequential manufacturing steps throughout the 
duration of the process. Continuous processes typically approach 
steady-state conditions. Continuous processes typically involve the 
simultaneous addition of raw material and withdrawal of product. For 
the purposes of this subpart, a process producing polymers is 
characterized as continuous or batch based on the operation of the 
polymerization reactors.
    Continuous process vent means a point of emission from a continuous 
unit operation within an affected source having a gaseous emission 
stream containing greater than 0.005 weight percent total organic HAP. 
Continuous process vents exclude relief valve discharges and leaks from 
equipment regulated under Sec. 63.1331.
    Continuous unit operation means a unit operation operated in a 
continuous process mode.
    Control device is defined in Sec. 63.111, except that the term 
``process vents'' shall be replaced with the term ``continuous process 
vents subject to Sec. 63.1315'' for the purpose of this subpart.
    Drawing unit means a unit operation which converts polymer into a 
different shape by melting or mixing the polymer and then pulling it 
through an orifice to create a continuously extruded product.
    Emission point means an individual continuous process vent, batch 
process vent, storage vessel, wastewater stream, equipment leak, heat 
exchange system, or process contact cooling tower.
    Emulsion process means a process carried out with the reactants in 
an emulsified form (e.g., polymerization reaction).
    Expandable polystyrene resin (EPS) means a polystyrene bead to 
which a blowing agent has been added using either an in-situ suspension 
process or a post-impregnation suspension process.
    Extruding unit means a unit operation which converts polymer into a 
different shape by melting or mixing the polymer and then forcing it 
through an orifice to create a continuously extruded product.
    Group 1 batch process vent means a batch process vent releasing 
annual organic HAP emissions greater than the level specified in 
Sec. 63.1323(d) and with a cutoff flow rate, calculated in accordance 
with Sec. 63.1323(f), greater than or equal to the annual average flow 
rate.
    Group 2 batch process vent means a batch process vent that does not 
fall within the definition of a Group 1 batch process vent.
    Group 1 continuous process vent means a continuous process vent 
releasing a gaseous emission stream that has a total resource 
effectiveness index value, calculated according to Sec. 63.115, less 
than or equal to 1.0 unless the continuous process vent is associated 
with existing thermoplastic product process units that produce methyl 
methacrylate butadiene styrene resin, then said vent falls within the 
Group 1 definition if the released emission stream has a total resource 
effectiveness index value less than or equal to 3.7.
    Group 2 continuous process vent means a continuous process vent 
that does not fall within the definition of a Group 1 continuous 
process vent.
    Group 1 storage vessel means a storage vessel at an existing 
affected source that meets the applicability criteria specified in 
Table 2 or Table 3 of this subpart, or a storage vessel at a new 
affected source that meets the applicability criteria specified in 
Table 4 or Table 5 of this subpart.
    Group 2 storage vessel means a storage vessel that does not fall 
within the definition of a Group 1 storage vessel.
    Halogenated aggregate batch vent stream means an aggregate batch 
vent stream determined to have a total mass emission rate of halogen 
atoms contained in organic compounds of 3,750 kilograms per year or 
greater determined by the procedures specified in Sec. 63.1323(h).
    Halogenated batch process vent means a batch process vent 
determined to have a mass emission rate of halogen atoms contained in 
organic compounds of 3,750 kilograms per year or greater determined by 
the procedures specified in Sec. 63.1323(h).
    Halogenated continuous process vent means a continuous process vent 
determined to have a mass emission rate of halogen atoms contained in 
organic compounds of 0.45 kilograms per hour or greater determined by 
the procedures specified in Sec. 63.115(d)(2)(v).
    Heat exchange system means any cooling tower system or once-through 
cooling water system (e.g., river or pond water) designed and operated 
to not allow contact between the cooling medium and process fluid or 
gases (i.e., a noncontact system). A heat exchange system can include 
more than one heat exchanger and can include recirculating or once-
through cooling systems.
    Maintenance wastewater means wastewater generated by the draining 
of process fluid from components in the TPPU into an individual drain 
system prior to or during maintenance activities. Maintenance 
wastewater can be generated during planned and unplanned shutdowns and 
during periods not associated with a shutdown. Examples of activities 
that can generate maintenance wastewater include descaling of heat 
exchanger tubing bundles, cleaning distillation column traps, draining 
of low legs and high point bleeds, draining of pumps into an individual 
drain system, reactor and equipment washdown, and draining of portions 
of the TPPU for repair.
    Mass process means a process carried out through the use of thermal 
energy (e.g., polymerization reaction). Mass processes do not utilize 
emulsifying or suspending agents, but can utilize catalysts or other 
additives.
    Material recovery section means the equipment that recovers 
unreacted or by-product materials from any process section for return 
to the TPPU, off-site purification or treatment, or sale. Equipment 
used to store recovered materials are not included. Equipment designed 
to separate unreacted or by-product material from the polymer product 
are to be included in this process section, provided that at the time 
of initial compliance some of the material is recovered for reuse in 
the process, off-site purification or treatment, or sale. Otherwise, 
such equipment are to be assigned to one of the other process sections, 
as appropriate. If equipment are used to recover unreacted or by-
product material and return it directly to the same piece of process 
equipment from which it was emitted, then said recovery equipment are 
considered part of the process section that contains the process 
equipment. On the other hand, if equipment are used to recover 
unreacted or by-product material and return it to a different piece of 
process equipment in the same process section, said recovery equipment 
are considered part of a material recovery section. Equipment that 
treats recovered materials are to be included in this process section, 
but equipment that also treats raw materials are not to be included in 
this process section. The latter equipment are to be included in the 
raw materials preparation section. Equipment used for the on-site 
recovery of ethylene glycol from PET plants, however, are not included 
in the material recovery section; they are to be included in the 
polymerization reaction section. Equipment used for the on-site 
recovery of ethylene glycol and other materials (e.g., methanol) from 
PET plants are not included in the material recovery section; these 
equipment are to be included in the polymerization reaction section.
    Methyl methacrylate acrylonitrile butadiene styrene resin (MABS) 
means

[[Page 48237]]

styrenic polymers containing methyl methacrylate, acrylonitrile, 
butadiene, and styrene. MABS is prepared by dissolving or dispersing 
polybutadiene rubber in a mixture of methyl methacrylate-acrylonitrile-
styrene and butadiene monomer. The graft polymerization is carried out 
by a bulk or a suspension process.
    Methyl methacrylate butadiene styrene resin (MBS) means styrenic 
polymers containing methyl methacrylate, butadiene, and styrene. 
Production of MBS is achieved using an emulsion process in which methyl 
methacrylate and styrene are grafted onto a styrene-butadiene rubber.
    Nitrile resin means a resin produced through the polymerization of 
acrylonitrile, methyl acrylate, and butadiene latex using an emulsion 
process.
    Organic hazardous air pollutant(s) (organic HAP) means one or more 
of the chemicals listed in Table 6 of this subpart or any other 
chemical which is:
    (1) Knowingly introduced into the manufacturing process other than 
as an impurity, or has been or will be reported under any Federal or 
State program, such as Title V or the Emergency Planning and Community 
Right-To-Know Act section 311, 312, or 313; and
    (2) Listed in Table 2 of subpart F of this part.
    PET using a dimethyl terephthalate process means the manufacturing 
of PET based on the esterification of dimethyl terephthalate with 
ethylene glycol to form the intermediate monomer bis-(2-hydroxyethyl)-
terephthalate that is subsequently polymerized to form PET.
    PET using a terephthalic acid process means the manufacturing of 
PET based on the esterification reaction of terephthalic acid with 
ethylene glycol to form the intermediate monomer bis-(2-hydroxyethyl)-
terephthalate that is subsequently polymerized to form PET.
    Poly(ethylene terephthalate) resin (PET) means a polymer or 
copolymer comprised of at least 50 percent bis-(2-hydroxyethyl)-
terephthalate by weight.
    Polymerization reaction section means the equipment designed to 
cause monomer(s) to react to form polymers, including equipment 
designed primarily to cause the formation of short polymer chains 
(e.g., oligomers or low polymers), but not including equipment designed 
to prepare raw materials for polymerization (e.g., esterification 
vessels). For the purposes of these standards, the polymerization 
reaction section begins with the equipment used to transfer the 
materials from the raw materials preparation section and ends with the 
last vessel in which polymerization occurs. Equipment used for the on-
site recovery of ethylene glycol from PET plants, however, are included 
in this process section, rather than in the material recovery process 
section.
    Polystyrene resin means a thermoplastic polymer or copolymer 
comprised of at least 80 percent styrene or para-methylstyrene by 
weight.
    Primary product is defined in and determined by the procedures 
specified in Sec. 63.1310(f).
    Process contact cooling tower system means a cooling tower system 
that is designed and operated to allow contact between the cooling 
medium and process fluid or gases.
    Process section means the equipment designed to accomplish a 
general but well-defined task in polymers production. Process sections 
include, but are not limited to, raw materials preparation, 
polymerization reaction, and material recovery. A process section may 
be dedicated to a single TPPU or common to more than one TPPU.
    Process unit means a collection of equipment assembled and 
connected by pipes or ducts to process raw materials and to manufacture 
a product.
    Process vent means a point of emission from a unit operation having 
a gaseous emission stream. Typical process vents include condenser 
vents, dryer vents, vacuum pumps, steam ejectors, and atmospheric vents 
from reactors and other process vessels, but do not include pressure 
relief valves.
    Product means a compound or material which is manufactured by a 
process unit. By-products, isolated intermediates, impurities, wastes, 
and trace contaminants are not considered products.
    Raw materials preparation section means the equipment at a polymer 
manufacturing plant designed to prepare raw materials, such as monomers 
and solvents, for polymerization. For the purposes of these standards, 
this process section begins with the equipment used to transfer raw 
materials from storage and/or the equipment used to transfer recovered 
material from the material recovery process sections, and ends with the 
last piece of equipment that prepares the material for polymerization. 
The raw materials preparation section may include equipment that is 
used to purify, dry, or otherwise treat raw materials or raw and 
recovered materials together; to activate catalysts; and to promote 
esterification including the formation of some short polymer chains 
(oligomers). The raw materials preparation section does not include 
equipment that is designed primarily to accomplish the formation of 
oligomers, the treatment of recovered materials alone, or the storage 
of raw materials.
    Recovery operations equipment means the equipment used to separate 
the components of process streams. Recovery operations equipment 
includes distillation unit, condensers, etc. Equipment used for 
wastewater treatment shall not be considered recovery operations 
equipment.
    Solid state polymerization unit means a unit operation which, 
through the application of heat, furthers the polymerization (i.e., 
increases the intrinsic viscosity) of polymer chips.
    Steady-state conditions means that all variables (temperatures, 
pressures, volumes, flow rates, etc.) in a process do not vary 
significantly with time; minor fluctuations about constant mean values 
can occur.
    Storage vessel means a tank or other vessel that is used to store 
liquids that contain one or more organic HAP and that has been 
assigned, according to the procedures in Sec. 63.1310(g), to a TPPU 
that is subject to this subpart. Storage vessels do not include:
    (1) vessels permanently attached to motor vehicles such as trucks, 
railcars, barges, or ships;
    (2) pressure vessels designed to operate in excess of 204.9 
kilopascals and without breathing or working losses to the atmosphere;
    (3) vessels with capacities smaller than 38 cubic meters;
    (4) vessels and equipment storing and/or handling material that 
contains no organic HAP and/or organic HAP as impurities only; and
    (5) wastewater storage tanks.
    Styrene acrylonitrile resin (SAN) means copolymers consisting 
primarily of styrene and acrylonitrile monomer units.
    Suspension process means a process carried out with the reactants 
in a state of suspension, typically achieved through the use of water 
and/or suspending agents (e.g., polymerization reaction).
    Thermoplastic product means one of the following types of products:
    (1) ABS latex;
    (2) ABS using a batch emulsion process;
    (3) ABS using a batch suspension process;
    (4) ABS using a continuous emulsion process;
    (5) ABS using a continuous mass process;
    (6) ASA/AMSAN;
    (7) EPS;
    (8) MABS;
    (9) MBS;

[[Page 48238]]

    (10) nitrile resin;
    (11) PET using a batch dimethyl terephthalate process;
    (12) PET using a batch terephthalic acid process;
    (13) PET using a continuous dimethyl terephthalate process;
    (14) PET using a continuous terephthalic acid process;
    (15) PET using a continuous terephthalic acid high viscosity 
multiple end finisher process;
    (16) polystyrene resin using a batch process;
    (17) polystyrene resin using a continuous process;
    (18) SAN using a batch process; or
    (19) SAN using a continuous process.
    Thermoplastic product process unit (TPPU) means a collection of 
equipment assembled and connected by process pipes or ducts, excluding 
gas, sanitary sewage, water (i.e., not wastewater), and steam 
connections, used to process raw materials and to manufacture a 
thermoplastic product as its primary product. This collection of 
equipment includes process vents from process vessels; storage vessels, 
as determined in Sec. 63.1310(g); and the equipment (i.e., pumps, 
compressors, agitators, pressure relief devices, sampling connection 
systems, open-ended valves or lines, valves, connectors, and 
instrumentation systems that are associated with the thermoplastic 
product process unit) that are subject to the equipment leak provisions 
as specified in Sec. 63.1331.
    Total organic compounds (TOC) means those compounds excluding 
methane and ethane measured according to the procedures of Method 18 or 
Method 25A, 40 CFR part 60, appendix A.
    Year means any consecutive 12-month period or 365 rolling days. For 
the purposes of emissions averaging, the term year applies to any 12-
month period selected by the facility and defined in its Emissions 
Averaging Plan. For the purposes of batch cycle limitations, the term 
year applies to the 12-month period defined by the facility in its 
Notification of Compliance Status.


Sec. 63.1313  Emission standards.

    (a) Except as allowed under paragraphs (b) and (c) of this section, 
the owner or operator of an existing or new affected source shall 
comply with the provisions in:
    (1) Section 63.1314 for storage vessels;
    (2) Sections 63.1315 or 63.1316 through 63.1320, as appropriate, 
for continuous process vents;
    (3) Section 63.1321 for batch process vents;
    (4) Section 63.1328 for heat exchange systems;
    (5) Section 63.1329 for process contact cooling towers;
    (6) Section 63.1330 for wastewater;
    (7) Section 63.1331 for equipment leaks;
    (8) Section 63.1333 for additional test methods and procedures;
    (9) Section 63.1334 for parameter monitoring levels and excursions; 
and
    (10) Section 63.1335 for general recordkeeping and reporting 
requirements.
    (b) Instead of complying with Secs. 63.1314, 63.1315, 63.1316 
through 63.1320, 63.1321, and 63.1330, the owner or operator of an 
existing affected source may elect to control any or all of the storage 
vessels, batch process vents, continuous process vents, and wastewater 
streams within the affected source to different levels using an 
emissions averaging compliance approach that uses the procedures 
specified in Sec. 63.1332. An owner or operator electing to use 
emissions averaging must still comply with the provisions of 
Secs. 63.1314, 63.1315, 63.1316 through 63.1320, 63.1321, and 63.1330 
for affected source emission points not included in the emissions 
average.
    (c) A State may decide not to allow the use of the emissions 
averaging compliance approach specified in paragraph (b) of this 
section.


Sec. 63.1314  Storage vessel provisions.

    (a) This section applies to each storage vessel that belongs to an 
affected source, as determined by Sec. 63.1310(g). Except as provided 
in paragraphs (b) through (d) of this section, the owner or operator of 
said storage vessels shall comply with the requirements of Secs. 63.119 
through 63.123 and 63.148, with the differences noted in paragraphs 
(a)(1) through (a)(16) of this section for the purposes of this 
subpart.
    (1) When the term ``storage vessel'' is used in Secs. 63.119 
through 63.123 and 63.148, the definition of this term in Sec. 63.1312 
shall apply for the purposes of this subpart.
    (2) When the term ``Group 1 storage vessel'' is used in 
Secs. 63.119 through 63.123 and 63.148, the definition of this term in 
Sec. 63.1312 shall apply for the purposes of this subpart.
    (3) When the term ``Group 2 storage vessel'' is used in 
Secs. 63.119 through 63.123 and 63.148, the definition of this term in 
Sec. 63.1312 shall apply for the purposes of this subpart.
    (4) When the emissions averaging provisions of Sec. 63.150 are 
referred to in Secs. 63.119 and 63.123, the emissions averaging 
provisions contained in Sec. 63.1332 shall apply for the purposes of 
this subpart.
    (5) When December 31, 1992, is referred to in Sec. 63.119, March 
29, 1995 shall apply instead, for the purposes of this subpart.
    (6) When April 22, 1994, is referred to in Sec. 63.119, September 
12, 1996 shall apply instead, for the purposes of this subpart.
    (7) Each owner or operator shall comply with this paragraph (a)(7) 
instead of Sec. 63.120(d)(1)(ii) for the purposes of this subpart. If 
the control device used to comply with this section is also used to 
comply with Secs. 63.1315 through 63.1330, the performance test 
required for these sections is acceptable for demonstrating compliance 
with Sec. 63.119(e) for the purposes of this subpart. The owner or 
operator is not required to prepare a design evaluation for the control 
device as described in Sec. 63.120(d)(1)(i) for the purposes of this 
subpart if the performance test meets the criteria specified in 
Sec. 63.120 (d)(1)(ii)(A) and (d)(1)(ii)(B).
    (8) When the term ``operating range'' is used in Sec. 63.120(d)(3), 
the term ``level'' shall apply instead, for the purposes of this 
subpart. This level shall be established using the procedures specified 
in Sec. 63.1334.
    (9) When the Notification of Compliance Status requirements 
contained in Sec. 63.152(b) are referred to in Secs. 63.120, 63.122, 
and 63.123, the Notification of Compliance Status requirements 
contained in Sec. 63.1335(e)(5) shall apply for the purposes of this 
subpart.
    (10) When the Periodic Report requirements contained in 
Sec. 63.152(c) are referred to in Secs. 63.120, 63.122, and 63.123, the 
Periodic Report requirements contained in Sec. 63.1335(e)(6) shall 
apply for the purposes of this subpart.
    (11) When other reports as required in Sec. 63.152(d) are referred 
to in Sec. 63.122, the reporting requirements contained in 
Sec. 63.1335(e)(7) shall apply for the purposes of this subpart.
    (12) When the Implementation Plan requirements contained in 
Sec. 63.151(c) are referred to in Sec. 63.120 and Sec. 63.122, the 
owner or operator of an affected source subject to this subpart need 
not comply for the purposes of this subpart.
    (13) When the Initial Notification Plan requirements contained in 
Sec. 63.151(b) are referred to in Sec. 63.122, the owner or operator of 
an affected source subject to this subpart need not comply for the 
purposes of this subpart.
    (14) When the determination of equivalence criteria in 
Sec. 63.102(b) is referred to in Sec. 63.121(a), the provisions in 
Sec. 63.6(g) shall apply for the purposes of this subpart.

[[Page 48239]]

    (15) When a performance test is required under the provisions of 
Sec. 63.120(d)(1)(ii), the use of Method 18 or Method 25A, 40 CFR part 
60, appendix A is allowed for the purposes of this subpart. The use of 
Method 25A, 40 CFR part 60, appendix A shall comply with paragraphs 
(a)(15)(i) and (a)(15)(ii) of this section.
    (i) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (ii) The use of Method 25A, 40 CFR part 60, appendix A is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (16) The compliance date for storage vessels at affected sources 
subject to the provisions of this section is specified in Sec. 63.1311.
    (b) Owners or operators of Group 1 storage vessels that belong to a 
new affected source producing SAN using a continuous process shall 
control emissions to the levels indicated in paragraphs (b)(1) and 
(b)(2) of this section.
    (1) For storage vessels with capacities greater than or equal to 
2,271 cubic meters (m\3\) containing a liquid mixture having a vapor 
pressure greater than or equal to 0.5 kilopascal (kPa) but less than 
0.7 kPa, emissions shall be controlled by at least 90 percent relative 
to uncontrolled emissions.
    (2) For storage vessels with capacities less than 151 m3 
containing a liquid mixture having a vapor pressure greater than or 
equal to 10 kPa, emissions shall be controlled by at least 98 percent 
relative to uncontrolled emissions.
    (c) Owners or operators of Group 1 storage vessels that belong to a 
new or existing affected source producing ASA/AMSAN shall control 
emissions by at least 98 percent relative to uncontrolled emissions.
    (d) The provisions of this subpart do not apply to storage vessels 
containing ethylene glycol at existing or new affected sources and 
storage vessels containing styrene at existing affected sources.


Sec. 63.1315  Continuous process vents provisions.

    (a) Except as provided in paragraphs (b) through (d) of this 
section, the owner or operator of continuous process vents shall comply 
with the requirements of Secs. 63.113 through 63.118, with the 
differences noted in paragraphs (a)(1) through (a)(15) of this section 
for the purposes of this subpart.
    (1) When the term ``process vent'' is used in Secs. 63.113 through 
63.118, apply the term ``continuous process vent,'' and the definition 
of this term in Sec. 63.1312 shall apply for the purposes of this 
subpart.
    (2) When the term ``Group 1 process vent'' is used in Secs. 63.113 
through 63.118, apply the term ``Group 1 continuous process vent,'' and 
the definition of this term in Sec. 63.1312 shall apply for the 
purposes of this subpart.
    (3) When the term ``Group 2 process vent'' is used in Secs. 63.113 
through 63.118, apply the term ``Group 2 continuous process vent,'' and 
the definition of this term in Sec. 63.1312 shall apply for the 
purposes of this subpart.
    (4) When December 31, 1992, (i.e., subpart G of this part proposal 
date) is referred to in Sec. 63.113, apply the date March 29, 1995 
(i.e., proposal date for this subpart) for the purposes of this 
subpart.
    (5) When Sec. 63.151(f), alternative monitoring parameters, and 
Sec. 63.152(e), submission of an operating permit, are referred to in 
Secs. 63.114(c) and 63.117(e), Sec. 63.1335(f), alternative monitoring 
parameters, and Sec. 63.1335(e)(8), submission of an operating permit, 
respectively, shall apply for the purposes of this subpart.
    (6) When the Notification of Compliance Status requirements 
contained in Sec. 63.152(b) are referred to in Secs. 63.114, 63.117, 
and 63.118, the Notification of Compliance Status requirements 
contained in Sec. 63.1335(e)(5) shall apply for the purposes of this 
subpart.
    (7) When the Periodic Report requirements contained in 
Sec. 63.152(c) are referred to in Secs. 63.117 and 63.118, the Periodic 
Report requirements contained in Sec. 63.1335(e)(6) shall apply for the 
purposes of this subpart.
    (8) When the definition of excursion in Sec. 63.152(c)(2)(ii)(A) is 
referred to in Sec. 63.118(f)(2), the definition of excursion in 
Sec. 63.1334(f) of this subpart shall apply for the purposes of this 
subpart.
    (9) Owners and operators shall comply with Sec. 63.1334, parameter 
monitoring levels and excursions, instead of Sec. 63.114(e) for the 
purposes of this subpart. When the term ``range'' is used in 
Secs. 63.117 and 63.118, the term ``level'' shall be used instead for 
the purposes of this subpart. This level is determined in accordance 
with Sec. 63.1334.
    (10) If a batch process vent is combined with a continuous process 
vent prior to being routed to a control device, the combined vent 
stream shall comply with either paragraph (a)(10)(i) or (a)(10)(ii) of 
this section, as appropriate.
    (i) If the continuous process vent is a Group 1 continuous process 
vent, the combined vent stream shall comply with all requirements for a 
Group 1 continuous process vent stream in Secs. 63.113 through 63.118, 
with the differences noted in paragraphs (a)(1) through (a)(9) of this 
section, for the purposes of this subpart.
    (ii) If the continuous process vent is a Group 2 continuous process 
vent, the total resource effectiveness (TRE) index value for the 
combined vent stream shall be calculated at the exit of any recovery 
device and prior to the control device at maximum representative 
operating conditions. For combined vent streams containing continuous 
and batch process vents, the maximum representative operating 
conditions shall be during periods when batch emission episodes are 
venting to the control device, resulting in the highest concentration 
of organic HAP in the combined vent stream.
    (11) If a batch process vent is combined with a continuous process 
vent prior to being routed to a recovery device, the TRE index value 
for the combined vent stream shall be calculated at the exit of the 
recovery device at maximum representative operating conditions for the 
purposes of this subpart. For combined vent streams containing 
continuous and batch process vents, the maximum representative 
operating conditions shall be during periods when batch emission 
episodes are venting to the recovery device, resulting in the highest 
concentration of organic HAP in the combined vent stream.
    (12) When reports of process changes are required under Sec. 63.118 
(g), (h), (i), and (j), paragraphs (a)(12)(i) through (a)(12)(iv) of 
this section shall apply for the purposes of this subpart.
    (i) For the purposes of this subpart, whenever a process change, as 
defined in Sec. 63.115(e), is made that causes a Group 2 continuous 
process vent to become a Group 1 continuous process vent, the owner or 
operator shall submit a report within 180 operating days after the 
process change is made or the information regarding the process change 
is known to the owner or operator. This report may be included in the 
next Periodic Report, as specified in Sec. 63.1335(e)(6)(iii)(D)(2). 
The following information shall be submitted:
    (A) A description of the process change; and
    (B) A schedule for compliance with the provisions of this subpart, 
as required under Sec. 63.1335(e)(6)(iii)(D)(2).

[[Page 48240]]

    (ii) Whenever a process change, as defined in Sec. 63.115(e), is 
made that causes a Group 2 process vent with a TRE greater than 4.0 to 
become a Group 2 process vent with a TRE less than 4.0, the owner or 
operator shall submit a report within 180 operating days after the 
process change is made or the information regarding the process change 
is known to the owner or operator. This report may be included in the 
next Periodic Report, as specified in Sec. 63.1335(e)(6)(iii)(D)(2). 
The following information shall be submitted:
    (A) A description of the process change; and
    (B) A schedule for compliance with the provisions of this subpart, 
as required under Sec. 63.1335(e)(6)(iii)(D)(2).
    (iii) Whenever a process change, as defined in Sec. 63.115(e), is 
made that causes a Group 2 process vent with a flow rate less than 
0.005 standard cubic meter per minute to become a Group 2 process vent 
with a flow rate of 0.005 standard cubic meter per minute or greater 
and a TRE index value less than or equal to 4.0, the owner or operator 
shall submit a report within 180 operating days after the process 
change is made or the information regarding the process change is known 
to the owner or operator. This report may be included in the next 
Periodic Report, as specified in Sec. 63.1335(e)(6)(iii)(D)(2). The 
following information shall be submitted:
    (A) A description of the process change; and
    (B) A schedule for compliance with the provisions of this subpart, 
as required under Sec. 63.1335(e)(6)(iii)(D)(2).
    (iv) Whenever a process change, as defined in Sec. 63.115(e), is 
made that causes a Group 2 process vent with an organic HAP 
concentration less than 50 parts per million by volume to become a 
Group 2 process vent with an organic HAP concentration of 50 parts per 
million by volume or greater and a TRE index value less than or equal 
to 4.0, the owner or operator shall submit a report within 180 
operating days after the process change is made or the information 
regarding the process change is known to the owner or operator. This 
report may be included in the next Periodic Report, as specified in 
Sec. 63.1335(e)(6)(iii)(D)(2). The following information shall be 
submitted:
    (A) A description of the process change; and
    (B) A schedule for compliance with the provisions of this subpart, 
as required under Sec. 63.1335(e)(6)(iii)(D)(2).
    (13) When the provisions of Sec. 63.116 (c)(3) and (c)(4) specify 
that Method 18, 40 CFR part 60, appendix A shall be used, Method 18 or 
Method 25A, 40 CFR part 60, appendix A may be used for the purposes of 
this subpart. The use of Method 25A, 40 CFR part 60, appendix A shall 
comply with paragraphs (a)(13)(i) and (a)(13)(ii) of this section.
    (i) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (ii) The use of Method 25A, 40 CFR part 60, appendix A is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (14) When the provisions of Sec. 63.116(b) identify conditions 
under which a performance test is not required, for purposes of this 
subpart, the exemption in paragraph (a)(14)(i) shall also apply. 
Further, if a performance test meeting the conditions specified in 
paragraph (a)(14)(ii) of this section has been conducted by the owner 
or operator, the results of said performance test may be submitted and 
a performance test, as required by this section, is not required.
    (i) An incinerator burning hazardous waste for which the owner or 
operator complies with the requirements of 40 CFR part 264, subpart O.
    (ii) Performance tests done for other subparts in 40 CFR part 60 or 
part 63 where total organic HAP or TOC was measured, provided the owner 
or operator can demonstrate that operating conditions for the process 
and control or recovery device during the performance test are 
representative of current operating conditions.
    (15) The compliance date for continuous process vents subject to 
the provisions of this section is specified in Sec. 63.1311.
    (b) Existing affected sources producing MBS shall comply with 
either paragraph (b)(1) or (b)(2) of this section.
    (1) Comply with paragraph (a) of this section, as specified in 
paragraphs (b)(1)(i) and (b)(1)(ii).
    (i) As specified in Sec. 63.1312, Group 1 continuous process vents 
at MBS existing affected sources are those with a total resource 
effectiveness value less than or equal to 3.7.
    (ii) When complying with this paragraph (b), the term ``TRE of 
4.0'', or related terms indicating a TRE value of 4.0, referred to in 
Sec. 63.113 through Sec. 63.118 shall be replaced with ``TRE of 6.7,'' 
for the purposes of this subpart. The TRE range of 3.7 to 6.7 for 
continuous process vents at existing affected sources producing MBS 
corresponds to the TRE range of 1.0 to 4.0 for other continuous process 
vents, as it applies to monitoring, recordkeeping, and reporting.
    (2) Not allow organic HAP emissions from the collection of 
continuous process vents at the affected source to be greater than 
0.000590 kg organic HAP/Mg of product. Compliance with this paragraph 
(b)(2) shall be determined using the procedures specified in 
Sec. 63.1333(b).
    (c) New affected sources producing SAN using a batch process shall 
comply with the applicable requirements in Sec. 63.1321.
    (d) Affected sources producing PET or polystyrene using a 
continuous process are subject to the emissions control provisions of 
Sec. 63.1316, the monitoring provisions of Sec. 63.1317, the testing 
and compliance demonstration provisions of Sec. 63.1318, the 
recordkeeping provisions of Sec. 63.1319, and the reporting provisions 
of Sec. 63.1320.


Sec. 63.1316  PET and polystyrene continuous process affected sources--
emissions control provisions.

    (a) The owner or operator of an affected source producing PET using 
a continuous process shall comply with paragraph (b) of this section. 
The owner or operator of an affected source producing polystyrene using 
a continuous process shall comply with paragraph (c) of this section.
    (b) Each owner or operator of an affected source producing PET 
using a continuous process shall comply with the requirements specified 
in paragraphs (b)(1) or (b)(2) of this section, as appropriate, and not 
with any of the requirements specified in 40 CFR part 60, subpart DDD. 
Compliance can be based on either organic HAP or TOC.
    (1) Each owner or operator of an affected source producing PET 
using a continuous dimethyl terephthalate process shall comply with 
paragraphs (b)(1)(i) through (b)(1)(iv) of this section.
    (i) For existing affected sources with organic HAP emissions from 
continuous process vents in the collection of material recovery 
sections (i.e., methanol recovery) within the affected source greater 
than 0.12 kg organic HAP/Mg of product, as determined by the procedure 
specified in Sec. 63.1318(b) and for all new affected sources, limit 
organic HAP emissions from continuous process vents in the collection 
of material recovery sections within the affected source by complying 
with one of the following:
    (A) Not allow emissions to be greater than 0.018 kg organic HAP/Mg 
of product; or

[[Page 48241]]

    (B) Not allow the outlet gas stream temperature from each final 
condenser in a material recovery section to exceed +3 deg. C (+37 deg. 
F).
    (ii) Limit organic HAP emissions from the continuous process vents 
in the collection of polymerization reaction sections within the 
affected source (including emissions from any equipment used to further 
recover ethylene glycol, but excluding emissions from process contact 
cooling towers) to 0.02 kg organic HAP/Mg of product or less.
    (iii) Limit organic HAP emissions from continuous process vents not 
included in a material recovery section, as specified in paragraph 
(b)(1)(i) of this section, or not included in a polymerization reaction 
section, as specified in paragraph (b)(1)(ii) of this section, by 
complying with Sec. 63.1315.
    (iv) Limit organic HAP emissions from all batch process vents by 
complying with Sec. 63.1321.
    (2) Each owner or operator of an affected source producing PET 
using a continuous terephthalic acid process shall comply with 
paragraphs (b)(2)(i) through (b)(2)(iv) of this section.
    (i) Limit organic HAP emissions from the continuous process vents 
associated with the esterification vessels in the collection of raw 
materials preparation sections within the affected source to 0.04 kg 
organic HAP/Mg of product or less. Limit organic HAP emissions 
associated with other continuous process vents in the collection of raw 
materials preparation sections within the affected source by complying 
with Sec. 63.1315.
    (ii) Limit organic HAP emissions from the continuous process vents 
in the collection of polymerization reaction sections within the 
affected source (including emissions from any equipment used to further 
recover ethylene glycol, but excluding emissions from process contact 
cooling towers) to 0.02 kg organic HAP/Mg of product or less.
    (iii) Limit organic HAP emissions from continuous process vents not 
included in a raw materials preparation section, as specified in 
paragraphs (b)(2)(i) of this section, or not included in a 
polymerization reaction section, as specified in paragraph (b)(2)(ii) 
of this section, by complying with Sec. 63.1315.
    (iv) Limit organic HAP emissions from all batch process vents by 
complying with Sec. 63.1321.
    (c) Each owner or operator of an affected source producing 
polystyrene resin using a continuous process shall comply with the 
requirements specified in paragraphs (c)(1) through (c)(3) of this 
section, as appropriate, and not with any of the requirements specified 
in 40 CFR part 60, subpart DDD. Compliance can be based on either 
organic HAP or TOC.
    (1) Limit organic HAP emissions from continuous process vents in 
the collection of material recovery sections within the affected source 
by complying with one of the following:
    (i) Not allow emissions to be greater than 0.0036 kg organic HAP/Mg 
of product;
    (ii) Not allow the outlet gas stream temperature from each final 
condenser in a material recovery section to exceed -25 deg.C 
(-13 deg.F); or
    (iii) Comply with one of the following:
    (A) Reduce emissions by 98 weight percent or to a concentration of 
20 parts per million by volume (ppmv) on a dry basis, whichever is less 
stringent. If an owner or operator elects to comply with the 20 ppmv 
standard, the concentration shall include a correction to 3 percent 
oxygen only when supplemental combustion air is used to combust the 
emissions;
    (B) Combust the emissions in a boiler or process heater with a 
design heat input capacity of 150 million Btu/hr or greater by 
introducing the emissions into the flame zone of the boiler or process 
heater; or
    (C) Combust the emissions in a flare that complies with the 
requirements of Sec. 63.11(b).
    (2) Limit organic HAP emissions from continuous process vents not 
included in a material recovery section, as specified in paragraph 
(c)(1)(i) of this section, by complying with Sec. 63.1315.
    (3) Limit organic HAP emissions from all batch process vents by 
complying with Sec. 63.1321.


Sec. 63.1317   PET and polystyrene continuous process affected 
sources--monitoring provisions.

    Continuous process vents using a control or recovery device to 
comply with Sec. 63.1316 shall comply with the applicable monitoring 
provisions specified for continuous process vents in Sec. 63.1315(a), 
except as specified in paragraphs (a) and (b) of this section.
    (a) For the purposes of paragraph (a) of this section, owners or 
operators shall ignore references to group determinations (i.e., total 
resource effectiveness) and are not required to comply with 
Sec. 63.113.
    (b) The monitoring period for condenser exit temperature when 
complying with Sec. 63.1316(b)(1)(i)(B) or Sec. 63.1316(c)(1)(ii) shall 
be each consecutive 3-hour continuous period (e.g., 6 am to 9 am, 9 am 
to 12 pm). Each owner or operator shall designate said monitoring 
period in the Notification of Compliance Status required by 
Sec. 63.1335(e)(5).


Sec. 63.1318   PET and polystyrene continuous process affected 
sources--testing and compliance demonstration provisions.

    (a) Except as specified in paragraphs (b) through (d) of this 
section, continuous process vents using a control or recovery device to 
comply with Sec. 63.1316 shall comply with the applicable testing and 
compliance provisions for continuous process vents specified in 
Sec. 63.1315, except that, for the purposes of this paragraph (a), 
owners or operators shall ignore references to group determination 
(i.e., total resource effectiveness) and are not required to comply 
with Sec. 63.113.
    (b) PET Affected Sources Using a Dimethyl Terephthalate Process--
Applicability Determination Procedure. Owners or operators shall 
calculate organic HAP emissions from the collection of material 
recovery sections at an existing affected source producing PET using a 
continuous dimethyl terephthalate process to determine whether 
Sec. 63.1316(a)(1)(i) is applicable using the procedures specified in 
either paragraph (b)(1) or (b)(2) of this section.
    (1) Use Equation 1 of this subpart to determine mass emissions per 
mass product as specified in paragraphs (b)(1)(i) and (b)(1)(ii) of 
this section.
[GRAPHIC] [TIFF OMITTED] TR12SE96.000

where:

ER=Emission rate of total organic HAP or TOC, kg/Mg product.
Ei=Emission rate of total organic HAP or TOC in continuous process 
vent i, kg/hr.
Pp=The rate of polymer produced, kg/hr.
n=Number of continuous process vents in the collection of material 
recovery sections at the affected source.
0.001=Conversion factor, kg to Mg.

    (i) The mass emission rate for each continuous process vent, 
Ei, shall be determined according to the procedures specified in 
Sec. 63.116(c)(4). The sampling site for determining whether 
Sec. 63.1316(a)(1)(i) is applicable shall be before any add-on control 
devices (i.e., those required by regulation) and after those recovery 
devices installed as part of operating the material recovery section. 
When the provisions of Sec. 63.116(c)(4) specify that Method 18, 40 CFR 
part 60, appendix A shall be used, Method 18 or Method 25A, 40 CFR part 
60, appendix A may be used for the purposes of this subpart. The use of

[[Page 48242]]

Method 25A, 40 CFR part 60, appendix A shall comply with paragraphs 
(b)(1)(i)(A) and (b)(1)(i)(B) of this section.
    (A) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (B) The use of Method 25A, 40 CFR part 60, appendix A is acceptable 
if the response from the high-level calibration gas is at least 20 
times the standard deviation of the response from the zero calibration 
gas when the instrument is zeroed on the most sensitive scale.
    (ii) The rate of polymer produced, Pp (kg/hr), shall be 
determined by dividing the weight (kg) of polymer pulled from the 
process line during the performance test by the number of hours taken 
to perform the performance test. The weight of polymer pulled shall be 
determined by direct measurement or by an alternate methodology, such 
as materials balance. If an alternate methodology is used, a 
description of the methodology, including all procedures, data, and 
assumptions shall be submitted as part of the Notification of 
Compliance Status required by Sec. 63.1335(e)(5).
    (2) Use engineering assessment, as described in 
Sec. 63.1323(b)(6)(i), to demonstrate that mass emissions per mass 
product are less than or equal to 0.07 kg organic HAP/Mg product. If 
engineering assessment shows that mass emissions per mass product are 
greater than 0.07 kg organic HAP/Mg product and the owner or operator 
wishes to demonstrate that mass emissions per mass product are less 
than the threshold emission rate of 0.12 kg organic HAP/Mg product, the 
owner or operator shall use the procedures specified in paragraph 
(b)(1) of this section.
    (c) Compliance with Mass Emissions per Mass Product Standards. 
Owners or operators complying with Sec. 63.1316 (b)(1)(i)(A), 
(b)(1)(ii), (b)(2)(i), (b)(2)(ii), and (c)(1)(i) shall demonstrate 
compliance with the mass emissions per mass product requirements using 
the procedures specified in paragraph (b)(1) of this section, except 
that the sampling site specified in paragraph (b)(1)(i) of this section 
shall be at the outlet of the last control or recovery device.
    (d) Compliance with Temperature Limits for Final Condensers. Owners 
or operators complying with Sec. 63.1316(b)(1)(i)(B) or 
Sec. 63.1316(c)(1)(ii) shall perform an initial performance test as 
specified in paragraph (d)(1) of this section to demonstrate initial 
compliance with the temperature limit requirements and shall 
demonstrate continuous compliance as specified in paragraph (d)(2) of 
this section.
    (1) Using the temperature monitoring device specified by the 
applicable monitoring provisions specified for continuous process vents 
in Sec. 63.1315, an average exit temperature shall be determined based 
on the average exit temperature for three performance tests. The 
average exit temperature for each 3-hour performance test shall be 
based on measurements taken at least every 15 minutes for 3 hours of 
continuous operation under maximum representative operating conditions 
for the process. For emissions streams containing continuous and batch 
process vents, the maximum representative operating conditions shall be 
during periods when batch emission episodes are venting to the control 
device resulting in the highest concentration of organic HAP in the 
emissions stream.
    (2) As specified in Sec. 63.1317(b), continuous compliance shall be 
determined based on an average exit temperature determined for each 
consecutive 3-hour continuous period. Each 3-hour period where the 
average exit temperature is more than 6  deg.C (10  deg.F) above the 
applicable specified temperature limit shall be considered an 
exceedance of the monitoring provisions.


Sec. 63.1319  PET and polystyrene continuous process affected sources--
recordkeeping provisions.

    (a) Except as specified in paragraphs (b) and (c) of this section, 
owners or operators using a control or recovery device to comply with 
Sec. 63.1316 shall comply with the applicable recordkeeping provisions 
specified in Sec. 63.1315, except that, for the purposes of this 
paragraph (a), owners or operators shall ignore references to group 
determinations (i.e., total resource effectiveness) and are not 
required to comply with Sec. 63.113.
    (b) Records Demonstrating Compliance With the Applicability 
Determination Procedure for PET Affected Sources Using a Dimethyl 
Terephthalate Process. Each owner or operator, as appropriate, shall 
keep the following data, as appropriate, up-to-date and readily 
accessible:
    (1) Results of the mass emissions per mass product calculation 
specified in Sec. 63.1318(b).
    (2) If complying with Sec. 63.1316 by demonstrating that mass 
emissions per mass product are less than or equal to the level 
specified in Sec. 63.1316(a)(1)(i), the information specified in 
paragraphs (b)(2)(i) and (b)(2)(ii) of this section.
    (i) Each process operation variable (e.g., pressure, temperature, 
type of catalyst) that may result in an increase in the mass emissions 
per mass product should said variable be changed.
    (ii) Records of any change in process operation that increases the 
mass emissions per mass product.
    (c) Records Demonstrating Compliance with Temperature Limits for 
Final Condensers. Owners or operators of continuous process vents 
complying with Sec. 63.1316(b)(1)(i)(B) or Sec. 63.1316(c)(1)(ii) shall 
keep the following data, as appropriate, up-to-date and readily 
accessible:
    (1) Records of monitoring data as specified in Sec. 63.1315, except 
that the monitoring period shall be each consecutive 3-hour continuous 
period.
    (2) Results of the performance test specified in Sec. 63.1318(d)(1) 
and any other performance test that may be subsequently required.


Sec. 63.1320  PET and polystyrene continuous process affected sources--
reporting provisions.

    (a) Except as specified in paragraphs (b) and (c) of this section, 
owners and operators using a control or recovery device to comply with 
Sec. 63.1316 shall comply with the applicable reporting provisions 
specified in Sec. 63.1315, except that, for the purposes of this 
paragraph (a), owners or operators shall ignore references to group 
determinations (i.e., total resource effectiveness) and are not 
required to comply with Sec. 63.113.
    (b) Reporting for PET Affected Sources Using a Dimethyl 
Terephthalate Process. Each owner or operator complying with 
Sec. 63.1316 by demonstrating that mass emissions per mass product are 
less than or equal to the level specified in Sec. 63.1316(a)(1)(i) 
shall comply with paragraphs (b)(1) through (b)(3) of this section.
    (1) Include the information specified in Sec. 63.1319(b)(2)(ii) in 
each Periodic Report, required by Sec. 63.1335(e)(6), as appropriate.
    (2) Include the information specified in Sec. 63.1319 (b)(1) or 
(b)(2) in the Notification of Compliance Status, required by 
Sec. 63.1335(e)(5), for the initial determination and in the 
appropriate Periodic Report, required by Sec. 63.1335(e)(6), for any 
subsequent determinations that may be required.
    (3) Whenever a process change, as defined in Sec. 63.115(e), is 
made that causes emissions from continuous process vents in the 
collection of material recovery sections (i.e., methanol recovery) 
within the affected source to be greater than 0.12 kg organic HAP/Mg of 
product, the owner or operator shall submit a report within

[[Page 48243]]

180 operating days after the process change is made or the information 
regarding the process change is known to the owner or operator. This 
report may be included in the next Periodic Report as specified in 
Sec. 63.1335(e)(6)(iii)(D)(2). The following information shall be 
submitted:
    (i) A description of the process change; and
    (ii) A schedule for compliance with the provisions of this subpart, 
as required under Sec. 63.1335(e)(6)(iii(D)(2).
    (c) Reporting for Affected Sources Complying With Temperature 
Limits for Final Condensers. Each owner or operator complying with 
Sec. 63.1316(b)(1)(i)(B) or Sec. 63.1316(c)(1)(ii) shall comply with 
paragraphs (c)(1) and (c)(2) of this section.
    (1) Report periods when the 3-hour average exit temperature is more 
than 6 deg. C (10 deg. F) above the applicable specified temperature 
limit in each Periodic Report, required by Sec. 63.1335(e)(6), as 
appropriate.
    (2) Include the information specified in Sec. 63.1319(c)(2) in the 
Notification of Compliance Status, required by Sec. 63.1335(e)(5), for 
the initial performance test and in the appropriate Periodic Report, 
required by Sec. 63.1335(e)(6), for any subsequent performance tests 
that may be required.
    (3) Include the information specified in Sec. 63.1317(b) in the 
Notification of Compliance Status, required by Sec. 63.1335(e)(5).


Sec. 63.1321  Batch process vents provisions.

    (a) Batch process vents. Except as specified in paragraphs (b) and 
(c) of this section, owners and operators of new and existing affected 
sources with batch process vents shall comply with the requirements in 
Secs. 63.1322 through 63.1327. The batch process vent group status 
shall be determined in accordance with Sec. 63.1323. Batch process 
vents classified as Group 1 shall comply with the reference control 
technology requirements for Group 1 batch process vents in 
Sec. 63.1322, the monitoring requirements in Sec. 63.1324, the 
performance test methods and procedures to determine compliance 
requirements in Sec. 63.1325, the recordkeeping requirements in 
Sec. 63.1326, and the reporting requirements in Sec. 63.1327. All Group 
2 batch process vents shall comply with the applicable reference 
control technology requirements in Sec. 63.1322, the recordkeeping 
requirements in Sec. 63.1326, and the reporting requirements in 
Sec. 63.1327.
    (b) New SAN batch affected sources. Owners and operators of new SAN 
affected sources using a batch process shall comply with the 
requirements of Sec. 63.1322 through Sec. 63.1327 for batch process 
vents and aggregate batch vent streams except as specified in 
paragraphs (b)(1) through (b)(2) of this section. For continuous 
process vents, owners and operators shall comply with the requirements 
of Sec. 63.1322 through Sec. 63.1327 except as specified in paragraph 
(b)(3) of this section.
    (1) For batch process vents, the determination of group status 
(i.e., Group 1/Group 2) under Sec. 63.1323 is not required.
    (2) For batch process vents and aggregate batch vent streams, the 
control requirements for individual batch process vents or aggregate 
batch vent streams (e.g., 90 percent emission reduction) as specified 
in Sec. 63.1322(a)(1), (a)(2), (b)(1), and (b)(2) shall not apply.
    (3) Continuous process vents using a control or recovery device to 
comply with Sec. 63.1322(a)(3) are subject to the applicable 
requirements in Sec. 63.1315(a), as appropriate, except as specified in 
paragraphs (b)(3)(i) and (b)(3)(ii) of this section.
    (i) Said continuous process vents are not subject to the group 
determination procedures of Sec. 63.115 for the purposes of this 
subpart.
    (ii) Said continuous process vents are not subject to the reference 
control technology provisions of Sec. 63.113 for the purposes of this 
subpart.
    (c) Aggregate batch vent streams. Aggregate batch vent streams, as 
defined in Sec. 63.1312, are subject to the control requirements for 
individual batch process vents, as specified in Sec. 63.1322(b), as 
well as the monitoring, testing, recordkeeping, and reporting 
requirements specified in Sec. 63.1324 through Sec. 63.1327.


Sec. 63.1322  Batch process vents--reference control technology.

    (a) Batch process vents. The owner or operator of a Group 1 batch 
process vent, as determined using the procedures in Sec. 63.1323, shall 
comply with the requirements of either paragraph (a)(1) or (a)(2) of 
this section, except as provided for in paragraph (a)(3) of this 
section. Compliance can be based on either organic HAP or TOC.
    (1) For each batch process vent, reduce organic HAP emissions using 
a flare.
    (i) The flare shall comply with the requirements of Sec. 63.11(b).
    (ii) Halogenated batch process vents, as defined in Sec. 63.1312, 
shall not be vented to a flare.
    (2) For each batch process vent, reduce organic HAP emissions for 
the batch cycle by 90 weight percent using a control device. Owners or 
operators may achieve compliance with this paragraph (a)(2) through the 
control of selected batch emission episodes or the control of portions 
of selected batch emission episodes. Documentation demonstrating how 
the 90 weight percent emission reduction is achieved is required by 
Sec. 63.1325(c)(2).
    (3) The owner or operator of a new affected source producing SAN 
using a batch process shall reduce organic HAP emissions from the 
collection of batch process vents, aggregate batch vent streams, and 
continuous process vents by 84 weight percent. Compliance with this 
paragraph (a)(3) shall be demonstrated using the procedures specified 
in Sec. 63.1333(c).
    (b) Aggregate batch vent streams. The owner or operator of an 
aggregate batch vent stream that contains one or more Group 1 batch 
process vents shall comply with the requirements of either paragraph 
(b)(1) or (b)(2) of this section, except as provided for in paragraph 
(b)(3) of this section. Compliance can be based on either organic HAP 
or TOC.
    (1) For each aggregate batch vent stream, reduce organic HAP 
emissions using a flare.
    (i) The flare shall comply with the requirements of Sec. 63.11(b).
    (ii) Halogenated aggregate batch vent streams, as defined in 
Sec. 63.1312, shall not be vented to a flare.
    (2) For each aggregate batch vent stream, reduce organic HAP 
emissions by 90 weight percent on a continuous basis using a control 
device.
    (3) The owner or operator of a new affected source producing SAN 
using a batch process shall comply with paragraph (a)(3) of this 
section.
    (c) Halogenated emissions. Halogenated Group 1 batch process vents, 
halogenated aggregate batch vent streams, and halogenated continuous 
process vents that are combusted as part of complying with paragraph 
(a)(2), (a)(3), (b)(2), or (b)(3) of this section, as appropriate, 
shall be controlled according to either paragraph (c)(1) or (c)(2) of 
this section.
    (1) If a combustion device is used to comply with paragraph (a)(2), 
(a)(3), (b)(2), or (b)(3) of this section for a halogenated batch 
process vent, halogenated aggregate batch vent stream, or halogenated 
continuous process vent, said emissions shall be ducted from the 
combustion device to an additional control device that reduces overall 
emissions of hydrogen halides and halogens by 99 percent before said 
emissions are discharged to the atmosphere.
    (2) A control device may be used to reduce the halogen atom mass 
emission

[[Page 48244]]

rate of said emissions to less than 3,750 kg/yr for batch process vents 
or aggregate batch vent streams and to less than 0.45 kilograms per 
hour for continuous process vents prior to venting to any combustion 
control device, and thus make the batch process vent, aggregate batch 
vent stream, or continuous process vent nonhalogenated. The 
nonhalogenated batch process vent, aggregate batch vent stream, or 
continuous process vent must then comply with the requirements of 
either paragraph (a) or (b) of this section, as appropriate.
    (d) If a boiler or process heater is used to comply with the 
percent reduction requirement specified in paragraph (a)(2), (a)(3), 
(b)(2), or (b)(3) of this section, the batch process vent, aggregate 
batch vent stream, or continuous process vent shall be introduced into 
the flame zone of such a device.
    (e) Combination of batch process vents or aggregate batch vent 
streams with continuous process vents. A batch process vent or 
aggregate batch vent stream combined with a continuous process vent is 
not subject to the provisions of Secs. 63.1323 through 63.1327, 
providing the requirements of paragraphs (e)(1), (e)(2), and either 
(e)(3) or (e)(4) of this section are met.
    (1) The batch process vent or aggregate batch vent stream is 
combined with a continuous process vent prior to routing the continuous 
process vent to a control or recovery device. In this paragraph (e)(1), 
the definitions of control device and recovery device as they relate to 
continuous process vents shall be used.
    (2) The only emissions to the atmosphere from the batch process 
vent or aggregate batch vent stream prior to being combined with the 
continuous process vent are from equipment subject to and in compliance 
with Sec. 63.1331.
    (3) If the batch process vent or aggregate batch vent stream is 
combined with a continuous process vent prior to being routed to a 
control device, the combined vent stream shall comply with the 
requirements in Sec. 63.1315(a)(10). In this paragraph (e)(3), the 
definition of control device as it relates to continuous process vents 
shall be used.
    (4) If the batch process vent or aggregate batch vent stream is 
combined with a continuous process vent prior to being routed to a 
recovery device, the combined vent stream shall comply with the 
requirements in Sec. 63.1315(a)(11). In this paragraph (e)(4), the 
definition of recovery device as it relates to continuous process vents 
shall be used.
    (f) Group 2 batch process vents with annual emissions greater than 
or equal to the level specified in Sec. 63.1323(d). The owner or 
operator of a Group 2 batch process vent with annual emissions greater 
than or equal to the level specified in Sec. 63.1323(d) shall comply 
with the provisions of (f)(1) and (f)(2) of this section.
    (1) Establish a batch cycle limitation that ensures the Group 2 
batch process vent does not become a Group 1 batch process vent.
    (2) Comply with the recordkeeping requirements in 
Sec. 63.1326(d)(2), and the reporting requirements in Sec. 63.1327 
(a)(3) and (b).
    (g) Group 2 batch process vents with annual emissions less than the 
level specified in Sec. 63.1323(d). The owner or operator of a Group 2 
batch process vent with annual emissions less than the level specified 
in Sec. 63.1323(d) shall comply with either paragraphs (g)(1) and 
(g)(2) of this section or with paragraphs (f)(1) and (f)(2) of this 
section.
    (1) Establish a batch cycle limitation that ensures emissions do 
not exceed the level specified in Sec. 63.1323(d).
    (2) Comply with the recordkeeping requirements in 
Sec. 63.1326(d)(1), and the reporting requirements in Sec. 63.1327 
(a)(2), (b), and (c).


Sec. 63.1323  Batch process vents--methods and procedures for group 
determination.

    (a) General requirements. Except as provided in paragraph (a)(3) of 
this section and in Sec. 63.1321(b)(1), the owner or operator of batch 
process vents at affected sources shall determine the group status of 
each batch process vent in accordance with the provisions of this 
section. This determination may be based on either organic HAP or TOC 
emissions.
    (1) The procedures specified in paragraphs (b) through (h) of this 
section shall be followed for the expected mix of products for a given 
batch process vent, as specified in paragraph (a)(1)(i) of this 
section, or for the worst-case HAP emitting product, as specified in 
paragraphs (a)(1)(ii) through (a)(1)(iv) of this section. ``Worst-case 
HAP emitting product'' is defined in paragraph (a)(1)(iii) of this 
section.
    (i) If an owner or operator chooses to follow the procedures 
specified in paragraphs (b) through (h) of this section for the 
expected mix of products, an identification of the different products 
and the number of batch cycles accomplished for each is required as 
part of the group determination documentation, as specified in 
Sec. 63.1326(a)(1).
    (ii) If an owner or operator chooses to follow the procedures 
specified in paragraphs (b) through (h) of this section for the worst-
case HAP emitting product, documentation identifying the worst-case HAP 
emitting product is required as part of the group determination 
documentation, as specified in Sec. 63.1326(a)(1).
    (iii) Except as specified in paragraph (a)(1)(iii)(B) of this 
section, the worst-case HAP emitting product is as defined in paragraph 
(a)(1)(iii)(A) of this section.
    (A) The worst-case HAP emitting product is the one with the highest 
mass emission rate (kg organic HAP per hour) averaged over the entire 
time period of the batch cycle.
    (B) Alternatively, when one product is produced more than 75 
percent of the time, accounts for more than 75 percent of the annual 
mass of product, and the owner or operator can show that the mass 
emission rate (kg organic HAP per hour) averaged over the entire time 
period of the batch cycle can reasonably be expected to be similar to 
the mass emission rate for other products having emissions from the 
same batch process vent, said product may be considered the worst-case 
HAP emitting product.
    (C) An owner or operator shall determine the worst-case HAP 
emitting product for a batch process vent as specified in paragraphs 
(a)(1)(iii)(C)(1) through (a)(1)(iii)(C)(3) of this section.
    (1) The emissions per batch emission episode shall be determined 
using any of the procedures specified in paragraph (b) of this section. 
The mass emission rate (kg organic HAP per hour) averaged over the 
entire time period of the batch cycle shall be determined by summing 
the emissions for each batch emission episode making up a complete 
batch cycle and dividing by the total duration in hours of the batch 
cycle.
    (2) To determine the worst-case HAP emitting product as specified 
under paragraph (a)(1)(iii)(A) of this section, the mass emission rate 
for each product shall be determined and compared.
    (3) To determine the worst-case HAP emitting product as specified 
under paragraph (a)(1)(iii)(B) of this section, the mass emission rate 
for the product meeting the time and mass criteria of paragraph 
(a)(1)(iii)(B) of this section shall be determined, and the owner or 
operator shall provide adequate information to demonstrate that the 
mass emission rate for said product is similar to the mass emission 
rates for the other products having emissions from the same batch 
process vent. In addition, the owner or operator shall provide 
information demonstrating that the selected product meets the time and

[[Page 48245]]

mass criteria of paragraph (a)(1)(iii)(B) of this section.
    (iv) The annual production of the worst-case HAP emitting product 
shall be determined by ratioing the production time of said product up 
to a 12 month period of actual production. It is not necessary to ratio 
up to a maximum production rate (i.e., 8,760 hours per year at maximum 
design production).
    (2) The annual uncontrolled organic HAP or TOC emissions and 
average flow rate shall be determined at the exit from the batch unit 
operation. For the purposes of these determinations, the primary 
condenser operating as a reflux condenser on a distillation column, the 
primary condenser recovering monomer or solvent from a batch stripping 
operation, and the primary condenser recovering monomer or solvent from 
a batch distillation operation shall be considered part of the batch 
unit operation. All other devices that recover or oxidize organic HAP 
or TOC vapors shall be considered control devices as defined in 
Sec. 63.1312.
    (3) The owner or operator of a batch process vent complying with 
the flare provisions in Sec. 63.1322(a)(1) or Sec. 63.1322(b)(1) or 
routing the batch process vent to a control device to comply with the 
requirements in Sec. 63.1322(a)(2) or Sec. 63.1322(b)(2) is not 
required to perform the batch process vent group determination 
described in this section, but shall comply with all requirements 
applicable to Group 1 batch process vents for said batch process vent.
    (b) Determination of annual emissions. The owner or operator shall 
calculate annual uncontrolled TOC or organic HAP emissions for each 
batch process vent using the methods described in paragraphs (b)(1) 
through (b)(8) of this section. Paragraphs (b)(1) through (b)(4) of 
this section present procedures that can be used to calculate the 
emissions from individual batch emission episodes. Emissions from batch 
processes involving multicomponent systems are to be calculated using 
the procedures in paragraphs (b)(1) through (b)(4) of this section. 
Individual HAP partial pressures in multicomponent systems shall be 
determined by the following methods: If the components are miscible in 
one another, use Raoult's law to calculate the partial pressures; if 
the solution is a dilute aqueous mixture use Henry's law constants to 
calculate partial pressures; if Raoult's law or Henry's law are not 
appropriate (or available) use experimentally obtained activity 
coefficients, Henry's law constants, or solubility data; if Raoult's 
law or Henry's law are not appropriate use models, such as the group-
contribution models, to predict activity coefficients; and if Raoult's 
law or Henry's law are not appropriate assume the components of the 
system behave independently and use the summation of all vapor 
pressures from the HAP's as the total HAP partial pressure. Chemical 
property data can be obtained from standard reference texts. Paragraph 
(b)(5) of this section describes how direct measurement can be used to 
estimate emissions. If the owner or operator can demonstrate that the 
procedures in paragraphs (b)(1) through (b)(4) of this section are not 
appropriate to estimate emissions from a batch emission episode, 
emissions may be estimated using engineering assessment, as described 
in paragraph (b)(6) of this section. Owners or operators are not 
required to demonstrate that direct measurement is not appropriate 
before utilizing engineering assessment. Paragraph (b)(6)(ii) of this 
section describes how an owner or operator shall demonstrate that the 
procedures in paragraphs (b)(1) through (b)(4) of this section are not 
appropriate. Emissions from a batch cycle shall be calculated in 
accordance with paragraph (b)(7) of this section, and annual emissions 
from the batch process vent shall be calculated in accordance with 
paragraph (b)(8) of this section.
    (1) TOC or organic HAP emissions from the purging of an empty 
vessel shall be calculated using Equation 2 of this subpart. Equation 2 
of this subpart does not take into account evaporation of any residual 
liquid in the vessel.
[GRAPHIC] [TIFF OMITTED] TR12SE96.001

where:

Eepisode=Emissions, kg/episode.
Vves=Volume of vessel, m3.
P=TOC or total organic HAP partial pressure, kPa.
MWwavg=Weighted average molecular weight of TOC or organic HAP in 
vapor, determined in accordance with paragraph (b)(4)(iii) of this 
section, kg/kmol.
R=Ideal gas constant, 8.314 m3bulletkPa/kmolbulletK.
T=Temperature of vessel vapor space, K.
m=Number of volumes of purge gas used.

    (2) TOC or organic HAP emissions from the purging of a filled 
vessel shall be calculated using Equation 3 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.002

where:

Eepisode=Emissions, kg/episode.
y=Saturated mole fraction of all TOC or organic HAP in vapor phase.
Vdr=Volumetric gas displacement rate, m3/min.
P=Pressure in vessel vapor space, kPa.
MWwavg=Weighted average molecular weight of TOC or organic HAP in 
vapor, determined in accordance with paragraph (b)(4)(iii) of this 
section, kg/kmol.
R=Ideal gas constant, 8.314 m3bulletkPa/kmolbulletK.
T=Temperature of vessel vapor space, K.
Pi=Vapor pressure of TOC or individual organic HAP i, kPa.
xi=Mole fraction of TOC or organic HAP i in the liquid.
n=Number of
    organic HAP in stream.


[[Page 48246]]


    Note: Summation not required if TOC emissions are being 
estimated.

Tm=Minutes/episode.

    (3) Emissions from vapor displacement due to transfer of material 
into or out of a vessel shall be calculated using Equation 4 of this 
subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.003

where:

Eepisode=Emissions, kg/episode.
y=Saturated mole fraction of all TOC or organic HAP in vapor phase.
V=Volume of gas displaced from the vessel, m3.
P=Pressure in vessel vapor space, kPa.
MWwavg=Weighted average molecular weight of TOC or organic HAP in 
vapor, determined in accordance with paragraph (b)(4)(i)(D) of this 
section, kg/kmol.
R=Ideal gas constant, 8.314 m3bulletkPa/kmolbulletK.
T=Temperature of vessel vapor space, K.

    (4) Emissions caused by the heating of a vessel shall be calculated 
using the procedures in either paragraphs (b)(4)(i), (b)(4)(ii), or 
(b)(4)(iii) of this section, as appropriate.
    (i) If the final temperature to which the vessel contents is heated 
is lower than 50 K below the boiling point of the HAP in the vessel, 
then emissions shall be calculated using the equations in paragraphs 
(b)(4)(i)(A) through (b)(4)(i)(D) of this section.
    (A) Emissions caused by heating of a vessel shall be calculated 
using Equation 5 of this subpart. The assumptions made for this 
calculation are atmospheric pressure of 760 millimeters of mercury (mm 
Hg) and the displaced gas is always saturated with volatile organic 
compounds (VOC) vapor in equilibrium with the liquid mixture.
[GRAPHIC] [TIFF OMITTED] TR12SE96.004

where:

Eepisode=Emissions, kg/episode.
(Pi)T1, (Pi)T2=Partial pressure (kPa) of TOC or each organic 
HAP i in the vessel headspace at initial (T1) and final (T2) 
temperature.
n=Number of organic HAP in stream. Note: Summation not required if TOC 
emissions are being estimated.
trianglen=Number of kilogram-moles (kg-moles) of gas displaced, 
determined in accordance with paragraph (b)(4)(i)(B) of this section.
101.325=Constant, kPa.
MWwavg=Weighted average molecular weight of TOC or organic HAP in 
vapor, determined in accordance with paragraph (b)(4)(i)(D) of this 
section, kg/kmol.

    (B) The moles of gas displaced, trianglen, is calculated using 
Equation 6 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.005

where:

trianglen=Number of kg-moles of gas displaced.
Vfs=Volume of free space in the vessel, m3.
R=Ideal gas constant, 8.314 m3bulletkPa/kmolbulletK.
Pa1=Initial noncondensible gas pressure in the vessel, kPa.
Pa2=Final noncondensible gas pressure, kPa.
T1=Initial temperature of vessel, K.
T2=Final temperature of vessel, K.

    (C) The initial and final pressure of the noncondensible gas in the 
vessel shall be calculated using Equation 7 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.006

where:

Pa=Initial or final partial pressure of noncondensible gas in the 
vessel headspace, kPa.
101.325=Constant, kPa.
(Pi)T=Partial pressure of TOC or each organic HAP i in the vessel 
headspace, kPa, at the initial or final temperature (T1 or T2).
n=Number of organic HAP in stream.

    Note: Summation not required if TOC emissions are being 
estimated.

    (D) The weighted average molecular weight of TOC or organic HAP in 
the displaced gas, MWwavg, shall be calculated using Equation 8 of 
this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.007

where:

C=TOC or organic HAP component
n=Number of TOC or organic HAP components in stream.

    (ii) If the vessel contents are heated to a temperature greater 
than 50 K below the boiling point, then emissions from

[[Page 48247]]

the heating of a vessel shall be calculated as the sum of the emissions 
calculated in accordance with paragraphs (b)(4)(ii)(A) and 
(b)(4)(ii)(B) of this section.
    (A) For the interval from the initial temperature to the 
temperature 50 K below the boiling point, emissions shall be calculated 
using Equation 5 of this subpart, where T2 is the temperature 50 K 
below the boiling point.
    (B) For the interval from the temperature 50 K below the boiling 
point to the final temperature, emissions shall be calculated as the 
summation of emissions for each 5 K increment, where the emissions for 
each increment shall be calculated using Equation 5 of this subpart.
    (1) If the final temperature of the heatup is lower than 5 K below 
the boiling point, the final temperature for the last increment shall 
be the final temperature for the heatup, even if the last increment is 
less than 5 K.
    (2) If the final temperature of the heatup is higher than 5 K below 
the boiling point, the final temperature for the last increment shall 
be the temperature 5 K below the boiling point, even if the last 
increment is less than 5 K.
    (3) If the vessel contents are heated to the boiling point and the 
vessel is not operating with a condenser, the final temperature for the 
final increment shall be the temperature 5 K below the boiling point, 
even if the last increment is less than 5 K.
    (iii) If the vessel is operating with a condenser, and the vessel 
contents are heated to the boiling point, the primary condenser, as 
specified in paragraph (a)(2) of this section, is considered part of 
the process. Emissions shall be calculated as the sum of emissions 
calculated using Equation 5 of this subpart, which calculates emissions 
due to heating the vessel contents to the temperature of the gas 
existing the condenser, and emissions calculated using Equation 4 of 
this subpart, which calculates emissions due to the displacement of the 
remaining saturated noncondensible gas in the vessel. The final 
temperature in Equation 5 of this subpart shall be set equal to the 
exit gas temperature of the condenser. Equation 4 of this subpart shall 
be used as written below in Equation 4a of this subpart, using free 
space volume, and T is set equal to the condenser exit gas temperature.
[GRAPHIC] [TIFF OMITTED] TR12SE96.008

where:

Eepisode=Emissions, kg/episode.
y=Saturated mole fraction of all TOC or organic HAP in vapor phase.
Vfs=Volume of the free space in the vessel, m3.
P=Pressure in vessel vapor space, kPa.
MWwavg=Weighted average molecular weight of TOC or organic HAP in 
vapor, determined in accordance with paragraph (b)(4)(i)(D) of this 
section, kg/kmol.
R=Ideal gas constant, 8.314 m3bulletkPa/kmolbulletK.
T=Temperature of condenser exit stream, K.

    (5) The owner or operator may estimate annual emissions for a batch 
emission episode by direct measurement. If direct measurement is used, 
the owner or operator shall either perform a test for the duration of a 
representative batch emission episode or perform a test during only 
those periods of the batch emission episode for which the emission rate 
for the entire episode can be determined or for which the emissions are 
greater than the average emission rate of the batch emission episode. 
The owner or operator choosing either of these options must develop an 
emission profile for the entire batch emission episode, based on either 
process knowledge or test data collected, to demonstrate that test 
periods are representative. Examples of information that could 
constitute process knowledge include calculations based on material 
balances and process stoichiometry. Previous test results may be used 
provided the results are still relevant to the current batch process 
vent conditions. Performance tests shall follow the procedures 
specified in paragraphs (b)(5)(i) through (b)(5)(iii) of this section. 
The procedures in either paragraph (b)(5)(iv) or (b)(5)(v) of this 
section shall be used to calculate the emissions per batch emission 
episode.
    (i) Method 1 or 1A, 40 CFR part 60, appendix A as appropriate, 
shall be used for selection of the sampling sites if the flow measuring 
device is a pitot tube. No traverse is necessary when Method 2A or 2D, 
40 CFR part 60, appendix A is used to determine gas stream volumetric 
flow rate.
    (ii) Gas stream volumetric flow rate and/or average flow rate shall 
be determined as specified in paragraph (e) of this section.
    (iii) Method 18 or Method 25A, 40 CFR part 60, appendix A, shall be 
used to determine the concentration of TOC or organic HAP, as 
appropriate. Alternatively, any other method or data that has been 
validated according to the applicable procedures in Method 301 of 
appendix A of this part may be used. The use of Method 25A, 40 CFR part 
60, appendix A shall comply with paragraphs (b)(5)(iii)(A) and 
(b)(5)(iii)(B) of this section.
    (A) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (B) The use of Method 25A, 40 CFR part 60, appendix A is acceptable 
if the response from the high-level calibration gas is at least 20 
times the standard deviation of the response from the zero calibration 
gas when the instrument is zeroed on the most sensitive scale.
    (iv) If an integrated sample is taken over the entire batch 
emission episode to determine TOC or average total organic HAP 
concentration, emissions shall be calculated using Equation 9 of this 
subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.009

where:

Eepisode=Emissions, kg/episode.
K=Constant, 2.494  x  10-6 (ppmv)-1 (gm-mole/scm) (kg/gm) 
(min/hr), where standard temperature is 20  deg.C.
Cj=Average concentration of TOC or sample organic HAP component j 
of the gas stream, dry basis, ppmv.
Mj=Molecular weight of TOC or sample organic HAP component j of 
the gas stream, gm/gm-mole.
AFR=Average flow rate of gas stream, dry basis, scmm.
Th=Hours/episode.
n=Number of organic HAP in stream.

    Note: Summation not required if TOC emissions are being 
estimated using a TOC concentration measured using Method 25A, 40 
CFR part 60, appendix A.


[[Page 48248]]


    (v) If grab samples are taken to determine TOC or average total 
organic HAP concentration, emissions shall be calculated according to 
paragraphs (b)(5)(v)(A) and (b)(5)(v)(B) of this section.
    (A) For each measurement point, the emission rate shall be 
calculated using Equation 10 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.010

where:

Epoint=Emission rate for individual measurement point, kg/hr.
K=Constant, 2.494  x  10-6 (ppmv)-1 (gm-mole/scm) (kg/gm) (min/
hr), where standard temperature is 20  deg.C.
Cj=Concentration of TOC or sample organic HAP component j of the 
gas stream, dry basis, ppmv.
Mj=Molecular weight of TOC or sample organic HAP component j of 
the gas stream, gm/gm-mole.
FR=Flow rate of gas stream for the measurement point, dry basis, scmm.
n=Number of organic HAP in stream.

    Note: Summation not required if TOC emissions are being 
estimated using a TOC concentration measured using Method 25A, 40 
CFR part 60, appendix A.

    (B) The emissions per batch emission episode shall be calculated 
using Equation 11 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.011

where:

Eepisode=Emissions, kg/episode.
DUR=Duration of the batch emission episode, hr/episode.
Ei=Emissions for measurement point i, kg/hr.
n=Number of measurements.

    (6) If the owner or operator can demonstrate that the methods in 
paragraphs (b)(1) through (b)(4) of this section are not appropriate to 
estimate emissions for a batch emissions episode, the owner or operator 
may use engineering assessment to estimate emissions as specified in 
paragraphs (b)(6)(i) and (b)(6)(ii) of this section. All data, 
assumptions, and procedures used in an engineering assessment shall be 
documented.
    (i) Engineering assessment includes, but is not limited to, the 
following:
    (A) Previous test results, provided the tests are representative of 
current operating practices;
    (B) Bench-scale or pilot-scale test data representative of the 
process under representative operating conditions;
    (C) Flow rate, TOC emission rate, or organic HAP emission rate 
specified or implied within a permit limit applicable to the batch 
process vent; and
    (D) Design analysis based on accepted chemical engineering 
principles, measurable process parameters, or physical or chemical laws 
or properties. Examples of analytical methods include, but are not 
limited to:
    (1) Use of material balances;
    (2) Estimation of flow rate based on physical equipment design such 
as pump or blower capacities; and
    (3) Estimation of TOC or organic HAP concentrations based on 
saturation conditions.
    (ii) The emissions estimation equations in paragraphs (b)(1) 
through (b)(4) of this section shall be considered inappropriate for 
estimating emissions for a given batch emissions episode if one or more 
of the criteria in paragraphs (b)(6)(ii)(A) through (b)(6)(ii)(B) of 
this section are met.
    (A) Previous test data are available that show a greater than 20 
percent discrepancy between the test value and the estimated value.
    (B) The owner or operator can demonstrate to the Administrator that 
the emissions estimation equations are not appropriate for a given 
batch emissions episode.
    (C) Data or other information supporting a finding that the 
emissions estimation equations are inappropriate as specified under 
paragraph (b)(6)(ii)(A) of this section shall be reported in the 
Notification of Compliance Status, as required in Sec. 63.1335(e)(5).
    (D) Data or other information supporting a finding that the 
emissions estimation equations are inappropriate as specified under 
paragraph (b)(6)(ii)(B) of this section shall be reported in the 
Precompliance Report, as required in Sec. 63.1335(e)(3).
    (7) For each batch process vent, the TOC or organic HAP emissions 
associated with a single batch cycle shall be calculated using Equation 
12 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.012

where:

where:

Ecycle=Emissions for an individual batch cycle, kg/batch cycle
Eepisode i=Emissions from batch emission episode i, kg/episode
n=Number of batch emission episodes for the batch cycle

    (8) Annual TOC or organic HAP emissions from a batch process vent 
shall be calculated using Equation 13 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.013

where:

AE=Annual emissions from a batch process vent, kg/yr.
Ni=Number of type i batch cycles performed annually, cycles/year
Ecycle i=Emissions from the batch process vent associated with a 
single type i batch cycle, as determined in paragraph (b)(7) of this 
section, kg/batch cycle
n=Number of different types of batch cycles that cause the emission of 
TOC or organic HAP from the batch process vent

    (c) (Reserved)
    (d) Minimum emission level exemption. A batch process vent with 
annual emissions less than 11,800 kg/yr is considered a Group 2 batch 
process vent and the owner or operator of said batch process vent shall 
comply with the requirements in Sec. 63.1322 (f) or (g). The owner or 
operator of said batch process vent is not required to comply with the 
provisions in paragraphs (e) through (g) of this section.
    (e) Determination of average flow rate. The owner or operator shall 
determine the average flow rate for each batch emission episode in 
accordance with one of the procedures provided in paragraphs (e)(1) 
through (e)(2) of this section. The annual average flow rate for a 
batch process vent shall be calculated as specified in paragraph (e)(3) 
of this section.
    (1) Determination of the average flow rate for a batch emission 
episode by direct measurement shall be made using the procedures 
specified in paragraphs (e)(1)(i) through (e)(1)(iii) of this section.
    (i) The volumetric flow rate for a batch emission episode, in 
standard cubic meters per minute (scmm) at 20 deg. C, shall be 
determined using Method 2, 2A, 2C, or 2D, 40 CFR part 60, appendix A, 
as appropriate.
    (ii) The volumetric flow rate of a representative batch emission 
episode shall be measured every 15 minutes.
    (iii) The average flow rate for a batch emission episode shall be 
calculated using Equation 14 of this subpart.

[[Page 48249]]

[GRAPHIC] [TIFF OMITTED] TR12SE96.014


where:

AFRepisode = Average flow rate for the batch emission episode, 
scmm.
FRi = Flow rate for individual measurement i, scmm.
n = Number of flow rate measurements taken during the batch emission 
episode.

    (2) The average flow rate for a batch emission episode may be 
determined by engineering assessment, as defined in paragraph (b)(6)(i) 
of this section. All data, assumptions, and procedures used shall be 
documented.
    (3) The annual average flow rate for a batch process vent shall be 
calculated using Equation 15 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.015

where:

AFR = Annual average flow rate for the batch process vent, scmm.
DURi = Duration of type i batch emission episodes annually, hrs/
yr.
AFRepisode, i = Average flow rate for type i batch emission 
episode, scmm.
n = Number of types of batch emission episodes venting from the batch 
process vent.

    (f) Determination of cutoff flow rate. For each batch process vent, 
the owner or operator shall calculate the cutoff flow rate using 
Equation 16 of this subpart.

CFR = (0.00437) (AE)-51.6 [Eq. 16]

where:

CFR = Cutoff flow rate, scmm.
AE = Annual TOC or organic HAP emissions, as determined in paragraph 
(b)(8) of this section, kg/yr.

    (g) Group 1/Group 2 status determination. The owner or operator 
shall compare the cutoff flow rate, calculated in accordance with 
paragraph (f) of this section, with the annual average flow rate, 
determined in accordance with paragraph (e)(4) of this section. The 
group determination status for each batch process vent shall be made 
using the criteria specified in paragraphs (g)(1) and (g)(2) of this 
section.
    (1) If the cutoff flow rate is greater than or equal to the annual 
average flow rate of the stream, the batch process vent is classified 
as a Group 1 batch process vent.
    (2) If the cutoff flow rate is less than the annual average flow 
rate of the stream, the batch process vent is classified as a Group 2 
batch process vent.
    (h) Determination of halogenation status. To determine whether a 
batch process vent or an aggregate batch vent stream is halogenated, 
the annual mass emission rate of halogen atoms contained in organic 
compounds shall be calculated using the procedures specified in 
paragraphs (h)(1) through (h)(3) of this section.
    (1) The concentration of each organic compound containing halogen 
atoms (ppmv, by compound) for each batch emission episode shall be 
determined based on any one of the following procedures:
    (i) Process knowledge that no halogens or hydrogen halides are 
present in the process may be used to demonstrate that a batch emission 
episode is nonhalogenated. Halogens or hydrogen halides that are 
unintentionally introduced into the process shall not be considered in 
making a finding that a batch emission episode is nonhalogenated.
    (ii) Engineering assessment as discussed in paragraph (b)(6)(i) of 
this section.
    (iii) Concentration of organic compounds containing halogens and 
hydrogen halides as measured by Method 26 or 26A, 40 CFR part 60, 
appendix A.
    (iv) Any other method or data that has been validated according to 
the applicable procedures in Method 301 of appendix A of this part.
    (2) The annual mass emissions of halogen atoms for a batch process 
vent shall be calculated using Equation 17 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.016

where:

Ehalogen = Mass of halogen atoms, dry basis, kg/yr.
K = Constant, 0.022 (ppmv)-1 (kg-mole per scm) (minute/yr), where 
standard temperature is 20 deg.C.
AFR = Annual average flow rate of the batch process vent, determined 
according to paragraph (e) of this section, scmm.
Mj, i = Molecular weight of halogen atom i in compound j, kg/kg-
mole.
Lj, i = Number of atoms of halogen i in compound j.
n = Number of halogenated compounds j in the batch process vent.
m = Number of different halogens i in each compound j of the batch 
process vent.
Cavgj = Average annual concentration of halogenated compound j in 
the batch process vent as determined by using Equation 18 of this 
subpart, dry basis, ppmv.
[GRAPHIC] [TIFF OMITTED] TR12SE96.017

where:

DURi = Duration of type i batch emission episodes annually, hrs/
yr.
Ci = Average concentration of halogenated compound j in type i 
batch emission episode, ppmv.
n = Number of types of batch emission episodes venting from the batch 
process vent.

    (3) The annual mass emissions of halogen atoms for an aggregate 
batch vent stream shall be the sum of the annual mass emissions of 
halogen atoms for all batch process vents included in the aggregate 
batch vent stream.
    (i) Process changes affecting Group 2 batch process vents. Whenever 
process changes, as described in paragraph (i)(1)

[[Page 48250]]

of this section, are made that affect one or more Group 2 batch process 
vents, the owner or operator shall comply with paragraphs (i) (2) and 
(3) of this section.
    (1) Examples of process changes include, but are not limited to, 
changes in production capacity, production rate, feedstock type, or 
catalyst type; or whenever there is replacement, removal, or 
modification of recovery equipment considered part of the batch unit 
operation as specified in paragraph (a)(2) of this section. An increase 
in the annual number of batch cycles beyond the batch cycle limitation 
constitutes a process change. For purposes of this paragraph (i), 
process changes do not include: process upsets; unintentional, 
temporary process changes; and changes that are within the margin of 
variation on which the original group determination was based.
    (2) For each batch process vent affected by a process change, the 
owner or operator shall redetermine the group status by repeating the 
procedures specified in paragraphs (b) through (g) of this section, as 
applicable; alternatively, engineering assessment, as described in 
paragraph (b)(6)(i) of this section, can be used to determine the 
effects of the process change.
    (3) Based on the results from paragraph (i)(2) of this section, 
owners or operators shall comply with either paragraph (i)(3) (i), 
(ii), or (iii) of this section.
    (i) If the redetermination described in paragraph (i)(2) of this 
section indicates that a Group 2 batch process vent has become a Group 
1 batch process vent as a result of the process change, the owner or 
operator shall submit a report as specified in Sec. 63.1327(b) and 
shall comply with the Group 1 provisions in Sec. 63.1322 through 
Sec. 63.1327 in accordance with the compliance schedule described in 
Sec. 63.1335(e)(6)(iii)(D)(2).
    (ii) If the redetermination described in paragraph (i)(2) of this 
section indicates that a Group 2 batch process vent with annual 
emissions less than the level specified in paragraph (d) of this 
section, that is in compliance with Sec. 63.1322(g), now has annual 
emissions greater than or equal to the level specified in paragraph (d) 
of this section but remains a Group 2 batch process vent, the owner or 
operator shall submit a report as specified in Sec. 63.1327(c) and 
shall comply with Sec. 63.1322(f) in accordance with the compliance 
schedule required by Sec. 63.1335(e)(6)(iii)(D)(2).
    (iii) If the redetermination described in paragraph (i)(2) of this 
section indicates no change in group status or no change in the 
relation of annual emissions to the levels specified in paragraph (d) 
of this section, the owner or operator is not required to submit a 
report, as described in Sec. 63.1327(e).
    (j) Process changes to new SAN affected sources using a batch 
process. Whenever process changes, as described in paragraph (j)(1) of 
this section, are made to a new affected source producing SAN using a 
batch process, the owner or operator shall comply with paragraphs (j) 
(2) and (3) of this section.
    (1) Examples of process changes include, but are not limited to, 
changes in production capacity, production rate, feedstock type, or 
catalyst type; replacement, removal, or addition of recovery equipment 
considered part of a batch unit operation, as specified in paragraph 
(a)(1) of this section; replacement, removal, or addition of control 
equipment associated with a continuous or batch process vent or an 
aggregate batch vent stream. For purposes of this paragraph (j)(1), 
process changes do not include process upsets or unintentional, 
temporary process changes.
    (2) The owner or operator shall redetermine the percent emission 
reduction achieved using the procedures specified in Sec. 63.1333(c). 
If engineering assessment, as described in paragraph (b)(6)(i) of this 
section, can demonstrate that the process change did not cause the 
percent emission reduction to decrease, it may be used in lieu of 
redetermining the percent reduction using the procedures specified in 
Sec. 63.1333(c).
    (3) Where the redetermined percent reduction is less than 84 
percent, the owner or operator shall submit a report as specified in 
Sec. 63.1327(d) and shall comply with Sec. 63.1322(a)(3) and all 
associated provisions in accordance with the compliance schedule 
described in Sec. 63.1335(e)(6)(iii)(D)(2).


Sec. 63.1324  Batch process vents--monitoring provisions.

    (a) General requirements. Each owner or operator of a batch process 
vent or aggregate batch vent stream that uses a control device to 
comply with the requirements in Sec. 63.1322(a) or Sec. 63.1322(b), 
shall install the monitoring equipment specified in paragraph (c) of 
this section.
    (1) This monitoring equipment shall be in operation at all times 
when batch emission episodes, or portions thereof, that the owner or 
operator has selected to control are vented to the control device, or 
at all times when an aggregate batch vent stream is vented to the 
control device.
    (2) The owner or operator shall operate control devices such that 
monitored parameters remain above the minimum level or below the 
maximum level, as appropriate, established as specified in paragraph 
(f) of this section.
    (b) Continuous process vents. Each owner or operator of a 
continuous process vent that uses a control device or recovery device 
to comply with the requirements in Sec. 63.1322(a)(3) shall comply with 
the applicable requirements of Sec. 63.1315(a) as specified in 
Sec. 63.1321(b).
    (c) Batch process vent and aggregate batch vent stream monitoring 
parameters. The monitoring equipment specified in paragraphs (c)(1) 
through (c)(8) of this section shall be installed as specified in 
paragraph (a) of this section. The parameters to be monitored are 
specified in Table 7 of this subpart.
    (1) Where an incinerator is used, a temperature monitoring device 
equipped with a continuous recorder is required.
    (i) Where an incinerator other than a catalytic incinerator is 
used, the temperature monitoring device shall be installed in the 
firebox or in the ductwork immediately downstream of the firebox in a 
position before any substantial heat exchange occurs.
    (ii) Where a catalytic incinerator is used, temperature monitoring 
devices shall be installed in the gas stream immediately before and 
after the catalyst bed.
    (2) Where a flare is used, a device (including but not limited to a 
thermocouple, ultra-violet beam sensor, or infrared sensor) capable of 
continuously detecting the presence of a pilot flame is required.
    (3) Where a boiler or process heater of less than 44 megawatts 
design heat input capacity is used, a temperature monitoring device in 
the firebox equipped with a continuous recorder is required. Any boiler 
or process heater in which all batch process vents or aggregate batch 
vent streams are introduced with the primary fuel or are used as the 
primary fuel is exempt from this requirement.
    (4) Where a scrubber is used with an incinerator, boiler, or 
process heater in concert with the combustion of halogenated batch 
process vents or halogenated aggregate batch vent streams, the 
following monitoring equipment is required for the scrubber.
    (i) A pH monitoring device equipped with a continuous recorder to 
monitor the pH of the scrubber effluent.
    (ii) A flow meter equipped with a continuous recorder shall be 
located at the scrubber influent to monitor the scrubber liquid flow 
rate.
    (5) Where an absorber is used, a scrubbing liquid temperature

[[Page 48251]]

monitoring device and a specific gravity monitoring device are 
required, each equipped with a continuous recorder.
    (6) Where a condenser is used, a condenser exit temperature 
(product side) monitoring device equipped with a continuous recorder is 
required.
    (7) Where a carbon adsorber is used, an integrating regeneration 
stream flow monitoring device having an accuracy of 10 
percent, capable of recording the total regeneration stream mass flow 
for each regeneration cycle; and a carbon bed temperature monitoring 
device, capable of recording the carbon bed temperature after each 
regeneration and within 15 minutes of completing any cooling cycle are 
required.
    (8) As an alternate to paragraphs (c)(5) through (c)(7) of this 
section, the owner or operator may install an organic monitoring device 
equipped with a continuous recorder.
    (d) Alternative monitoring parameters. An owner or operator of a 
batch process vent or aggregate batch vent stream may request approval 
to monitor parameters other than those required by paragraph (c) of 
this section. The request shall be submitted according to the 
procedures specified in Sec. 63.1335(f). Approval shall be requested if 
the owner or operator:
    (1) Uses a control device other than those included in paragraph 
(c) of this section; or
    (2) Uses one of the control devices included in paragraph (c) of 
this section, but seeks to monitor a parameter other than those 
specified in Table 7 of this subpart and paragraph (c) of this section.
    (e) Monitoring of bypass lines. Owners or operators of a batch 
process vent or aggregate batch vent stream using a vent system that 
contains bypass lines that could divert emissions away from a control 
device used to comply with Sec. 63.1322(a) or Sec. 63.1322(b) shall 
comply with either paragraph (d)(1), (d)(2), or (d)(3) of this section. 
Equipment such as low leg drains, high point bleeds, analyzer vents, 
open-ended valves or lines, and pressure relief valves needed for 
safety purposes are not subject to this paragraph (e).
    (1) Properly install, maintain, and operate a flow indicator that 
takes a reading at least once every 15 minutes. Records shall be 
generated as specified in Sec. 63.1326(e)(3). The flow indicator shall 
be installed at the entrance to any bypass line that could divert 
emissions away from the control device and to the atmosphere; or
    (2) Secure the bypass line valve in the non-diverting position with 
a car-seal or a lock-and-key type configuration. A visual inspection of 
the seal or closure mechanism shall be performed at least once every 
month to ensure that the valve is maintained in the non-diverting 
position and emissions are not diverted through the bypass line. 
Records shall be generated as specified in Sec. 63.1326(e)(4).
    (3) Continuously monitor the bypass line valve position using 
computer monitoring and record any periods when the position of the 
bypass line valve has changed as specified in Sec. 63.1326(e)(4).
    (f) Establishment of parameter monitoring levels. Parameter 
monitoring levels for batch process vents and aggregate batch vent 
streams shall be established as specified in paragraphs (f)(1) through 
(f)(3) of this section. For continuous process vents complying with 
Sec. 63.1322(a)(3), parameter monitoring levels shall be established as 
specified in Sec. 63.1315(a), except as specified in paragraph (f)(4) 
of this section.
    (1) For each parameter monitored under paragraph (c) of this 
section, the owner or operator shall establish a level, defined as 
either a maximum or minimum operating parameter as denoted in Table 8 
of this subpart, that indicates proper operation of the control device. 
The level shall be established in accordance with the procedures 
specified in Sec. 63.1334.
    (i) For batch process vents using a control device to comply with 
Sec. 63.1322(a)(2), the established level shall reflect the control 
efficiency established as part of the initial compliance demonstration 
specified in Sec. 63.1325(c)(2).
    (ii) For aggregate batch vent streams using a control device to 
comply with Sec. 63.1322(b)(2), the established level shall reflect the 
control efficiency requirement specified in Sec. 63.1322(b)(2).
    (iii) For batch process vents and aggregate batch vent streams 
using a control device to comply with Sec. 63.1322(a)(3), the 
established level shall reflect the control efficiency established as 
part of the initial compliance demonstration specified in 
Sec. 63.1325(f)(4).
    (2) The established level, along with supporting documentation, 
shall be submitted in the Notification of Compliance Status or the 
operating permit application as required in Sec. 63.1335(e)(5) or 
Sec. 63.1335(e)(8), respectively.
    (3) The operating day shall be defined as part of establishing the 
parameter monitoring level and shall be submitted with the information 
in paragraph (f)(2) of this section. The definition of operating day 
shall specify the times at which an operating day begins and ends. The 
operating day shall not exceed 24 hours.
    (4) For continuous process vents using a control or recovery device 
to comply with Sec. 63.1322(a)(3), the established level shall reflect 
the control efficiency established as part of the initial compliance 
demonstration specified in Sec. 63.1325(f)(4).


Sec. 63.1325  Batch process vents--performance test methods and 
procedures to determine compliance.

    (a) Use of a flare. When a flare is used to comply with 
Secs. 63.1322 (a)(1), (a)(3), (b)(1), or (b)(3), the owner or operator 
shall comply with the flare provisions in Sec. 63.11(b).
    (b) Exceptions to performance tests. An owner or operator is not 
required to conduct a performance test when a control device specified 
in paragraphs (b)(1) through (b)(5) of this section is used to comply 
with Sec. 63.1322 (a)(2) or (a)(3). Further, if a performance test 
meeting the conditions specified in paragraph (b)(6) of this section 
has been conducted by the owner or operator, the results of said 
performance test may be submitted and a performance test, as required 
by this section, is not required.
    (1) A boiler or process heater with a design heat input capacity of 
44 megawatts or greater.
    (2) A boiler or process heater where the vent stream is introduced 
with the primary fuel or is used as the primary fuel.
    (3) A control device for which a performance test was conducted for 
determining compliance with a New Source Performance Standard (NSPS) 
and the test was conducted using the same procedures specified in this 
section and no process changes have been made since the test. Recovery 
devices used for controlling emissions from continuous process vents 
complying with Sec. 63.1322(a)(3) are also eligible for the exemption 
described in this paragraph (b)(3).
    (4) A boiler or process heater burning hazardous waste for which 
the owner or operator:
    (i) Has been issued a final permit under 40 CFR part 270 and 
complies with the requirements of 40 CFR part 266, subpart H; or
    (ii) Has certified compliance with the interim status requirements 
of 40 CFR part 266, subpart H.
    (5) An incinerator burning hazardous waste for which the owner or 
operator complies with the requirements of 40 CFR part 264, subpart O.
    (6) Performance tests done for other subparts in 40 CFR part 60 or 
part 63 where total organic HAP or TOC was measured, provided the owner 
or

[[Page 48252]]

operator can demonstrate that operating conditions for the process and 
control device during the performance test are representative of 
current operating conditions.
    (c) Batch process vent testing and procedures for compliance with 
Sec. 63.1322(a)(2). Except as provided in paragraph (b) of this 
section, an owner or operator using a control device to comply with 
Sec. 63.1322(a)(2) shall conduct a performance test using the 
procedures specified in paragraph (c)(1) of this section in order to 
determine the control efficiency of the control device. An owner or 
operator shall determine the percent reduction for the batch cycle 
using the control efficiency of the control device as specified in 
paragraphs (c)(2)(i) through (c)(2)(iii) of this section and the 
procedures specified in paragraph (c)(2) of this section. Compliance 
may be based on either total organic HAP or TOC. For purposes of this 
paragraph (c) and all paragraphs that are part of this paragraph (c), 
the term ``batch emission episode'' shall have the meaning ``period of 
the batch emission episode selected for control,'' which may be the 
entire batch emission episode or may only be a portion of the batch 
emission episode.
    (1) Performance tests shall be conducted as specified in paragraphs 
(c)(1)(i) through (c)(1)(v) of this section.
    (i) Except as specified in paragraph (c)(1)(i)(A) of this section, 
a test shall be performed for the entire period of each batch emission 
episode in the batch cycle that the owner or operator selects to 
control as part of achieving the required 90 percent emission reduction 
for the batch cycle specified in Sec. 63.1322(a)(2). Only one test is 
required for each batch emission episode selected by the owner or 
operator for control. The owner or operator shall follow the procedures 
listed in paragraphs (c)(1)(i)(B) through (c)(1)(i)(D) of this section.
    (A) Alternatively, an owner or operator may choose to test only 
those periods of the batch emission episode during which the emission 
rate for the entire episode can be determined or during which the 
emissions are greater than the average emission rate of the batch 
emission episode. The owner or operator choosing either of these 
options must develop an emission profile for the entire batch emission 
episode, based on either process knowledge or test data collected, to 
demonstrate that test periods are representative. Examples of 
information that could constitute process knowledge include 
calculations based on material balances and process stoichiometry. 
Previous test results may be used provided the results are still 
relevant to the current batch process vent conditions.
    (B) Method 1 or 1A, 40 CFR part 60, appendix A, as appropriate, 
shall be used for selection of the sampling sites if the flow measuring 
device is a pitot tube. No traverse is necessary when Method 2A or 2D, 
40 CFR part 60, appendix A is used to determine gas stream volumetric 
flow rate. Inlet sampling sites shall be located as specified in 
paragraphs (c)(1)(i)(B)(1) and (c)(1)(i)(B)(2) of this section. Outlet 
sampling sites shall be located at the outlet of the control device 
prior to release to the atmosphere.
    (1) The control device inlet sampling site shall be located at the 
exit from the batch unit operation before any control device. 
Sec. 63.1323(a)(2) describes those recovery devices considered part of 
the unit operation. Inlet sampling sites would be after these specified 
recovery devices.
    (2) If a batch process vent is introduced with the combustion air 
or as a secondary fuel into a boiler or process heater with a design 
capacity less than 44 megawatts, selection of the location of the inlet 
sampling sites shall ensure the measurement of total organic HAP or TOC 
(minus methane and ethane) concentrations in all batch process vents 
and primary and secondary fuels introduced into the boiler or process 
heater.
    (C) Gas stream volumetric flow rate and/or average flow rate shall 
be determined as specified in Sec. 63.1323(e).
    (D) Method 18 or Method 25A, 40 CFR part 60, appendix A shall be 
used to determine the concentration of organic HAP or TOC, as 
appropriate. Alternatively, any other method or data that has been 
validated according to the applicable procedures in Method 301 of 
appendix A of this part may be used. The use of Method 25A, 40 CFR part 
60, appendix A shall comply with paragraphs (c)(1)(i)(D)(1) and 
(c)(1)(i)(D)(2) of this section.
    (1) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (2) The use of Method 25A, 40 CFR part 60, appendix A is acceptable 
if the response from the high-level calibration gas is at least 20 
times the standard deviation of the response from the zero calibration 
gas when the instrument is zeroed on the most sensitive scale.
    (ii) If an integrated sample is taken over the entire test period 
to determine TOC or average total organic HAP concentration, emissions 
per batch emission episode shall be calculated using Equations 19 and 
20 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.018

      
    [GRAPHIC] [TIFF OMITTED] TR12SE96.019
    
where:

Eepisode = Inlet or outlet emissions, kg/episode.
K = Constant, 2.494 x 10-6 (ppmv)-1 (gm-mole/scm) (kg/gm) 
(min/hr), where standard temperature is 20 deg.C.
Cj = Average inlet or outlet concentration of TOC or sample 
component j of the gas stream for the batch emission episode, dry 
basis, ppmv.
Mj = Molecular weight of TOC or sample component j of the gas 
stream, gm/gm-mole.

[[Page 48253]]

AFR = Average inlet or outlet flow rate of gas stream for the batch 
emission episode, dry basis, scmm.
Th = Hours/episode
n = Number of organic HAP in stream.

    Note: Summation not required if TOC emissions are being 
estimated using a TOC concentration measured using Method 25A, 40 
CFR part 60, appendix A.

    (iii) If grab samples are taken to determine TOC or total organic 
HAP concentration, emissions shall be calculated according to 
paragraphs (c)(1)(iii) (A) and (B) of this section.
    (A) For each measurement point, the emission rates shall be 
calculated using Equations 21 and 22 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.020

      
    [GRAPHIC] [TIFF OMITTED] TR12SE96.021
    
where:

Epoint = Inlet or outlet emission rate for the measurement point, 
kg/hr.
K = Constant, 2.494 x 10-6 (ppmv)-1 (gm-mole/scm) (kg/gm) 
(min/hr), where standard temperature is 20 deg.C.
Cj = Inlet or outlet concentration of TOC or sample organic HAP 
component j of the gas stream, dry basis, ppmv.
Mj = Molecular weight of TOC or sample organic HAP component j of 
the gas stream, gm/gm-mole.
FR = Inlet or outlet flow rate of gas stream for the measurement point, 
dry basis, scmm.
n = Number of organic HAP in stream.

    Note: Summation not required if TOC emissions are being 
estimated using a TOC concentration measured using Method 25A, 40 
CFR part 60, appendix A.

    (B) The emissions per batch emission episode shall be calculated 
using Equations 23 and 24 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.022

      
    [GRAPHIC] [TIFF OMITTED] TR12SE96.023
    
where:

Eepisode = Inlet or outlet emissions, kg/episode.
DUR = Duration of the batch emission episode, hr/episode.
Epoint, i = Inlet or outlet emissions for measurement point i, kg/
hr.
n = Number of measurements.

    (iv) The control efficiency for the control device shall be 
calculated using Equation 25 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.024

where:

R = Control efficiency of control device, percent.
Einlet = Mass rate of TOC or total organic HAP for batch emission 
episode i at the inlet to the control device as calculated under 
paragraph (c)(1)(ii) or (c)(1)(iii) of this section, kg/hr.
Eoutlet = Mass rate of TOC or total organic HAP for batch emission 
episode i at the outlet of the control device, as calculated under 
paragraph (c)(1)(ii) or (c)(1)(iii) of this section, kg/hr.
n = Number of batch emission episodes in the batch cycle selected to be 
controlled.

    (v) If the batch process vent entering a boiler or process heater 
with a design capacity less than 44 megawatts is introduced with the 
combustion air or as a secondary fuel, the weight-percent reduction of 
total organic HAP or TOC across the device shall be determined by 
comparing the TOC or total organic HAP

[[Page 48254]]

in all combusted batch process vents and primary and secondary fuels 
with the TOC or total organic HAP exiting the combustion device, 
respectively.
    (2) The percent reduction for the batch cycle shall be determined 
using Equation 26 of this subpart and the control device efficiencies 
specified in paragraphs (c)(2)(i) through (c)(2)(iii) of this section. 
All information used to calculate the batch cycle percent reduction, 
including a definition of the batch cycle identifying all batch 
emission episodes, must be recorded as specified in Sec. 63.1326(b)(2). 
This information shall include identification of those batch emission 
episodes, or portions thereof, selected for control.
[GRAPHIC] [TIFF OMITTED] TR12SE96.025

where:

PR = Percent reduction
Eunc = Mass rate of TOC or total organic HAP for uncontrolled 
batch emission episode i, kg/hr.
Einlet,con = Mass rate of TOC or total organic HAP for controlled 
batch emission episode i at the inlet to the control device, kg/hr.
R = Control efficiency of control device as specified in paragraphs 
(c)(2) (i) through (c) (2)(iii) of this section.
n = Number of uncontrolled batch emission episodes, controlled batch 
emission episodes, and control devices. The value of n is not 
necessarily the same for these three items.

    (i) If a performance test is required by paragraph (c) of this 
section, the control efficiency of the control device shall be as 
determined in paragraph (c)(1)(iv) of this section.
    (ii) If a performance test is not required by paragraph (c) of this 
section for a combustion control device, as specified in paragraph (b) 
of this section, the control efficiency shall be 98 percent. The 
control efficiency for a flare shall be 98 percent.
    (iii) If a performance test is not required by paragraph (c) of 
this section for a noncombustion control device, the control efficiency 
shall be determined by the owner or operator based on engineering 
assessment.
    (d) Batch process vent and aggregate batch vent stream testing for 
compliance with Sec. 63.1322(c) [halogenated emission streams]. An 
owner or operator controlling halogenated emissions in compliance with 
Sec. 63.1322(c) shall conduct a performance test to determine 
compliance with the control efficiency specified in Sec. 63.1322(c)(1) 
or the emission limit specified in Sec. 63.1322(c)(2) for hydrogen 
halides and halogens.
    (1) Sampling sites shall be located at the inlet and outlet of the 
scrubber or other control device used to reduce halogen emissions in 
complying with Sec. 63.1322(c)(1) or at the outlet of the control 
device used to reduce halogen emissions in complying with 
Sec. 63.1322(c)(2).
    (2) The mass emissions of each hydrogen halide and halogen compound 
for the batch cycle or aggregate batch vent stream shall be calculated 
from the measured concentrations and the gas stream flow rate(s) 
determined by the procedures specified in paragraphs (d)(2)(i) and 
(d)(2)(ii) of this section except as specified in paragraph (d)(5) of 
this section.
    (i) Method 26 or Method 26A, 40 CFR part 60, appendix A, shall be 
used to determine the concentration, in Mg per dry scm, of total 
hydrogen halides and halogens present in the emissions stream.
    (ii) Gas stream volumetric flow rate and/or average flow rate shall 
be determined as specified in Sec. 63.1323(e).
    (3) To determine compliance with the percent reduction specified in 
Sec. 63.1322(c)(1), the mass emissions for any hydrogen halides and 
halogens present at the inlet of the scrubber or other control device 
shall be summed together. The mass emissions of any hydrogen halides or 
halogens present at the outlet of the scrubber or other control device 
shall be summed together. Percent reduction shall be determined by 
subtracting the outlet mass emissions from the inlet mass emissions and 
then dividing the result by the inlet mass emissions.
    (4) To determine compliance with the emission limit specified in 
Sec. 63.1322(c)(2), the annual mass emissions for any hydrogen halides 
and halogens present at the outlet of the control device and prior to 
any combustion device shall be summed together and compared to the 
emission limit specified in Sec. 63.1322(c)(2).
    (5) The owner or operator may use any other method to demonstrate 
compliance if the method or data has been validated according to the 
applicable procedures of Method 301 of appendix A of this part.
    (e) Aggregate batch vent stream testing for compliance with 
Sec. 63.1322 (b)(2) or (b)(3). Owners or operators of aggregate batch 
vent streams complying with Sec. 63.1322 (b)(2) or (b)(3) shall conduct 
a performance test using the performance testing procedures for 
continuous process vents in Sec. 63.116(c). For the purposes of this 
subpart, when the provisions of Sec. 63.116(c) specify that Method 18, 
40 CFR part 60, appendix A, shall be used, Method 18 or Method 25A, 40 
CFR part 60, appendix A, may be used. The use of Method 25A, 40 CFR 
part 60, appendix A, shall comply with paragraphs (e)(1) and (e)(2) of 
this section.
    (1) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A, shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (2) The use of Method 25A, 40 CFR part 60, appendix A, is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (f) Compliance with Sec. 63.1322(a)(3) [new SAN batch affected 
sources]. Except as provided in paragraph (b) of this section, an owner 
or operator using a control or recovery device to comply with the 
percent reduction requirement in Sec. 63.1322(a)(3) shall conduct 
performance tests as specified in either paragraph (f)(1), (f)(2), or 
(f)(3) of this section, as applicable. Compliance with 
Sec. 63.1322(a)(3) shall be determined as specified in paragraph (f)(4) 
of this section.
    (1) For batch process vents, performance tests shall be conducted 
using the procedures specified in paragraph (c) of this section, except 
that the owner or operator is not required to determine the percent 
reduction for the batch cycle as specified in paragraph (c)(2) of this 
section.
    (2) For continuous process vents, performance tests shall be 
conducted as required by the applicable requirements

[[Page 48255]]

of Sec. 63.1315(a) as specified in Sec. 63.1321(b).
    (3) For aggregate batch vent streams, performance tests shall be 
conducted as specified in paragraph (e) of this section.
    (4) Compliance with the percent reduction requirement of 
Sec. 63.1322(a)(3) shall be demonstrated using the procedures specified 
in Sec. 63.1333(c) and the control device efficiencies specified in 
either paragraph (f)(4)(i) or (f)(4)(ii) of this section. Emissions for 
uncontrolled continuous process vents and aggregate batch vent streams 
shall be determined based on the direct measurement procedures 
specified in paragraph (f)(2) and (f)(3) of this section, respectively, 
or based on engineering assessment, as specified in 
Sec. 63.1323(b)(6)(i). At the discretion of the owner or operator, 
emissions for uncontrolled batch process vents shall be determined 
based on any of the procedures in Sec. 63.1323(b).
    (i) For noncombustion devices, the control efficiency shall be as 
determined by the performance test required by paragraph (f)(1), 
(f)(2), or (f)(3) of this section. Alternatively, if a performance test 
is not required by paragraph (c) of this section, the control 
efficiency shall be determined by the owner or operator based on 
engineering assessment.
    (ii) For combustion devices, the control efficiency shall be as 
determined by the performance test required by paragraph (f)(1), 
(f)(2), or (f)(3) of this section. Alternatively, if a performance test 
is not required, the control efficiency shall be 98 percent. The 
control efficiency for a flare shall be 98 percent.
    (g) Batch cycle limitation. The batch cycle limitation required by 
Sec. 63.1322 (f) and (g) shall be established as specified in paragraph 
(g)(1) of this section and shall include the elements specified in 
paragraph (g)(2) of this section.
    (1) The batch cycle limitation shall be determined by the owner or 
operator such that annual emissions for the batch process vent remain 
less than the level specified in Sec. 63.1323(d) when complying with 
Sec. 63.1322(g). Alternatively, when complying with Sec. 63.1322(f), 
the batch cycle limitation shall ensure that annual emissions remain at 
a level such that said batch process vent remains a Group 2 batch 
process vent, given the actual annual flow rate for said batch process 
vent determined according to the procedures specified in 
Sec. 63.1323(e). The batch cycle limitation shall be determined using 
the same basis, as described in Sec. 63.1323(a)(1), used to make the 
group determination (i.e., expected mix of products or worst-case HAP 
emitting product). The establishment of the batch cycle limitation is 
not dependent upon any past production or activity level.
    (i) If the expected mix of products serves as the basis for the 
batch cycle limitation, the batch cycle limitation shall be determined 
such that any foreseeable combination of products which the owner or 
operator desires the flexibility to manufacture shall be allowed. 
Combinations of products not accounted for in the documentation 
required by paragraph (g)(2)(iv) of this section shall not be allowed 
within the restrictions of the batch cycle limitation.
    (ii) If, for a batch process vent with more than one product, a 
single worst-case HAP emitting product serves as the basis for the 
batch cycle limitation, the batch cycle limitation shall be determined 
such that the maximum number of batch cycles the owner or operator 
desires the flexibility to accomplish, using the worst-case HAP 
emitting product and ensuring that the batch process vent remains a 
Group 2 batch process vent or that emissions remain less than the level 
specified in Sec. 63.1323(d), shall be allowed. This value shall be the 
total number of batch cycles allowed within the restrictions of the 
batch cycle limitation regardless of which products are manufactured.
    (2) Documentation supporting the establishment of the batch cycle 
limitation shall include the information specified in paragraphs 
(g)(2)(i) through (g)(2)(v) of this section, as appropriate.
    (i) Identification that the purpose of the batch cycle limitation 
is to comply with Sec. 63.1322 (f)(1) or (g)(1).
    (ii) Identification that the batch cycle limitation is based on a 
single worst-case HAP emitting product or on the expected mix of 
products for said batch process vent as allowed under 
Sec. 63.1323(a)(1).
    (iii) Definition of operating year for purposes of determining 
compliance with the batch cycle limitation.
    (iv) If the batch cycle limitation is based on a single worst-case 
HAP emitting product, documentation specified in Sec. 63.1323 
(a)(1)(ii) through (a)(1)(iv), as appropriate, describing how the 
single product meets the requirements for worst-case HAP emitting 
product and the number of batch cycles allowed under the batch cycle 
limitation.
    (v) If the batch cycle limitation is based on the expected mix of 
products, the owner or operator shall provide documentation that 
describes as many scenarios for differing mixes of products (i.e., how 
many batch cycles for each product) that the owner or operator desires 
the flexibility to accomplish. Alternatively, the owner or operator 
shall provide a description of the relationship among the mix of 
products that will allow a determination of compliance with the batch 
cycle limitation under an infinite number of scenarios. For example, if 
a batch process vent has two products, each product has the same flow 
rate and emits for the same amount of time, and product No. 1 has twice 
the emissions as product No. 2, the relationship describing an infinite 
number of scenarios would be that the owner or operator can accomplish 
two batch cycles of product No. 2 for each batch cycle of product No. 1 
within the restriction of the batch cycle limitation.


Sec. 63.1326  Batch process vents--recordkeeping provisions.

    (a) Group determination records for batch process vents. Except as 
provided in paragraphs (a)(7) through (a)(9) of this section, each 
owner or operator of an affected source shall maintain the records 
specified in paragraphs (a)(1) through (a)(6) of this section for each 
batch process vent subject to the group determination procedures of 
Sec. 63.1323. Except for paragraph (a)(1) of this section, the records 
required by this paragraph (a) are restricted to the information 
developed and used to make the group determination under 
Sec. 63.1323(b) through Sec. 63.1323(g), as appropriate. The 
information required by paragraph (a)(1) of this section is required 
for all batch process vents subject to the group determination 
procedures of Sec. 63.1323. If an owner or operator did not need to 
develop certain information (e.g., annual average flow rate) to 
determine the group status, this paragraph (a) does not require that 
additional information be developed.
    (1) An identification of each unique product that has emissions 
from one or more batch emission episodes venting from the batch process 
vent.
    (2) A description of, and an emission estimate for, each batch 
emission episode, and the total emissions associated with one batch 
cycle for each unique product identified in paragraph (a)(1) of this 
section that was considered in making the group determination under 
Sec. 63.1323.
    (3) Total annual uncontrolled TOC or organic HAP emissions, 
determined at the exit from the batch unit operation before any control 
device, determined in accordance with Sec. 63.1323(b).
    (i) For Group 2 batch process vents, said emissions shall be 
determined at the batch cycle limitation.
    (ii) For Group 1 batch process vents, said emissions shall be those 
used to determine the group status of the batch process vent.

[[Page 48256]]

    (4) The annual average flow rate for the batch process vent, 
determined in accordance with Sec. 63.1323(e).
    (5) The cutoff flow rate, determined in accordance with 
Sec. 63.1323(f).
    (6) The results of the batch process vent group determination, 
conducted in accordance with Sec. 63.1323(g).
    (7) If a batch process vent is in compliance with Sec. 63.1322 (a) 
or (b) and the control device is operating at all times when batch 
emission episodes are venting from the batch process vent, none of the 
records in paragraphs (a)(1) through (a)(6) of this section are 
required.
    (8) If a batch process vent is in compliance with Sec. 63.1322 (a) 
or (b), but the control device is operated only during selected batch 
emission episodes, only the records in paragraphs (a)(1) through (a)(3) 
of this section are required.
    (9) If the total annual emissions from the batch process vent are 
less than the appropriate level specified in Sec. 63.1323(d), only the 
records in paragraphs (a)(1) through (a)(3) of this section are 
required.
    (b) Compliance demonstration records. Each owner or operator of a 
batch process vent or aggregate batch vent stream complying with 
Sec. 63.1322 (a) or (b), shall keep the following records, as 
applicable, up-to-date and readily accessible:
    (1) The annual mass emissions of halogen atoms in the batch process 
vent or aggregate batch vent stream determined according to the 
procedures specified in Sec. 63.1323(h);
    (2) If a batch process vent is in compliance with 
Sec. 63.1322(a)(2), records documenting the batch cycle percent 
reduction as specified in Sec. 63.1325(c)(2); and
    (3) When using a flare to comply with Sec. 63.1322 (a)(1), (a)(3), 
(b)(1), or (b)(3):
    (i) The flare design (i.e., steam-assisted, air-assisted or non-
assisted);
    (ii) All visible emission readings, heat content determinations, 
flow rate measurements, and exit velocity determinations made during 
the compliance determination required by Sec. 63.1325(a); and
    (iii) All periods during the compliance determination required by 
Sec. 63.1325(a) when the pilot flame is absent.
    (4) The following information when using a control device to 
achieve compliance with Sec. 63.1322 (a)(2), (a)(3), (b)(2), or (b)(3):
    (i) For an incinerator or non-combustion control device, the 
percent reduction of organic HAP or TOC achieved, as determined using 
the procedures specified in Sec. 63.1325(c) for batch process vents and 
Sec. 63.1325(e) for aggregate batch vent streams;
    (ii) For a boiler or process heater, a description of the location 
at which the vent stream is introduced into the boiler or process 
heater;
    (iii) For a boiler or process heater with a design heat input 
capacity of less than 44 megawatts and where the vent stream is 
introduced with combustion air or used as a secondary fuel and is not 
mixed with the primary fuel, the percent reduction of organic HAP or 
TOC achieved, as determined using the procedures specified in 
Sec. 63.1325(c) for batch process vents and Sec. 63.1325(e) for 
aggregate batch vent streams; and
    (iv) For a scrubber or other control device following a combustion 
device to control halogenated batch process vents or halogenated 
aggregate batch vent streams, the percent reduction of total hydrogen 
halides and halogens as determined under Sec. 63.1325(d)(3) or the 
emission limit determined under Sec. 63.1325(d)(4).
    (c) Establishment of parameter monitoring level records. For each 
parameter monitored according to Sec. 63.1324(c) and Table 7 of this 
subpart, or for alternate parameters and/or parameters for alternate 
control devices monitored according to Sec. 63.1327(f) as allowed under 
Sec. 63.1324(d), maintain documentation showing the establishment of 
the level that indicates proper operation of the control device as 
required by Sec. 63.1324(f) for parameters specified in Sec. 63.1324(c) 
and as required by Sec. 63.1335(e) for alternate parameters. Said 
documentation shall include the parameter monitoring data used to 
establish the level.
    (d) Group 2 batch process vent continuous compliance records. The 
owner or operator of a Group 2 batch process vent shall comply with 
either paragraph (d)(1) or (d)(2) of this section, as appropriate.
    (1) The owner or operator of a Group 2 batch process vent complying 
with Sec. 63.1322(g) shall keep the following records up-to-date and 
readily accessible:
    (i) Records designating the established batch cycle limitation 
required by Sec. 63.1322(g)(1) and specified in Sec. 63.1325(g).
    (ii) Records specifying the number and type of batch cycles 
accomplished for each three month period.
    (2) The owner or operator of a Group 2 batch process vent complying 
with Sec. 63.1322(f) shall keep the following records up-to-date and 
readily accessible:
    (i) Records designating the established batch cycle limitation 
required by Sec. 63.1322(f)(1) and specified in Sec. 63.1325(g).
    (ii) Records specifying the number and type of batch cycles 
accomplished for each three month period.
    (e) Controlled batch process vent continuous compliance records. 
Each owner or operator of a batch process vent that uses a control 
device to comply with Sec. 63.1322(a) shall keep the following records, 
as applicable, up-to-date and readily accessible:
    (1) Continuous records of the equipment operating parameters 
specified to be monitored under Sec. 63.1324(c) as applicable, and 
listed in Table 7 of this subpart, or specified by the Administrator in 
accordance with Sec. 63.1327(f) as allowed under Sec. 63.1324(d). Said 
records shall be kept as specified under Sec. 63.1335(d), except as 
specified in paragraphs (e)(1)(i) and (e)(1)(ii) of this section.
    (i) For flares, the records specified in Table 7 of this subpart 
shall be kept rather than averages.
    (ii) For carbon adsorbers, the records specified in Table 7 of this 
subpart shall be kept rather than averages.
    (2) Records of the batch cycle daily average value of each 
continuously monitored parameter, except as provided in paragraph 
(e)(2)(iii) of this section, as calculated using the procedures 
specified in paragraphs (e)(2)(i) through (e)(2)(ii) of this section.
    (i) The batch cycle daily average shall be calculated as the 
average of all parameter values measured for an operating day during 
those batch emission episodes, or portions thereof, in the batch cycle 
that the owner or operator has selected to control.
    (ii) Monitoring data recorded during periods of monitoring system 
breakdowns, repairs, calibration checks, and zero (low-level) and high-
level adjustments shall not be included in computing the batch cycle 
daily averages.
    (iii) If all recorded values for a monitored parameter during an 
operating day are above the minimum or below the maximum level 
established in accordance with Sec. 63.1324(f), the owner or operator 
may record that all values were above the minimum or below the maximum 
level established rather than calculating and recording a batch cycle 
daily average for that operating day.
    (3) Hourly records of whether the flow indicator for bypass lines 
specified in Sec. 63.1324(e)(1) was operating and whether a diversion 
was detected at any time during the hour. Also, records of the times of 
all periods when the vent is diverted from the control device or the 
flow indicator specified in Sec. 63.1324(e)(1) is not operating.

[[Page 48257]]

    (4) Where a seal or closure mechanism is used to comply with 
Sec. 63.1324(e)(2) or where computer monitoring of the position of the 
bypass valve is used to comply with Sec. 63.1324(e)(3), hourly records 
of flow are not required.
    (i) For compliance with Sec. 63.1324(e)(2), the owner or operator 
shall record whether the monthly visual inspection of the seals or 
closure mechanisms has been done, and shall record the occurrence of 
all periods when the seal mechanism is broken, the bypass line valve 
position has changed, or the key for a lock-and-key type configuration 
has been checked out, and records of any car-seal that has broken.
    (ii) For compliance with Sec. 63.1324(e)(3), the owner or operator 
shall record the times of all periods when the bypass line valve 
position has changed.
    (5) Records specifying the times and duration of periods of 
monitoring system breakdowns, repairs, calibration checks, and zero 
(low-level) and high-level adjustments. In addition, records specifying 
any other periods of process or control device operation when monitors 
are not operating.
    (f) Aggregate batch vent stream continuous compliance records. In 
addition to the records specified in paragraphs (b) and (c) of this 
section, each owner or operator of an aggregate batch vent stream using 
a control device to comply with Sec. 63.1322(b) shall keep records in 
accordance with the requirements for continuous process vents in 
Sec. 63.118 (a) and (b), as applicable and as appropriate, except that 
when complying with Sec. 63.118(b), owners or operators shall disregard 
statements concerning TRE index values for the purposes of this 
subpart.


Sec. 63.1327  Batch process vents--reporting requirements.

    (a) The owner or operator of a batch process vent or aggregate 
batch vent stream at an affected source shall submit the information 
specified in paragraphs (a)(1) through (a)(4) of this section, as 
appropriate, as part of the Notification of Compliance Status specified 
in Sec. 63.1335(e)(5).
    (1) For each batch process vent complying Sec. 63.1322(a) and each 
aggregate batch vent stream complying Sec. 63.1322(b), the information 
specified in Sec. 63.1326 (b) and (c), as applicable.
    (2) For each Group 2 batch process vent with annual emissions less 
than the level specified in Sec. 63.1323(d), the information specified 
in Sec. 63.1326(d)(1)(i).
    (3) For each Group 2 batch process vent with annual emissions 
greater than or equal to the level specified in Sec. 63.1323(d), the 
information specified in Sec. 63.1326(d)(2)(i).
    (4) For each batch process vent subject to the group determination 
procedures, the information specified in Sec. 63.1326(a), as 
appropriate.
    (b) Whenever a process change, as defined in Sec. 63.1323(i)(1), is 
made that causes a Group 2 batch process vent to become a Group 1 batch 
process vent, the owner or operator shall submit a report within 180 
operating days after the process change is made or the information 
regarding the process change is known to the owner or operator. This 
report may be included in the next Periodic Report, as specified in 
Sec. 63.1335(e)(6)(iii)(D)(2). The following information shall be 
submitted:
    (1) A description of the process change; and
    (2) A schedule for compliance with the provisions of Sec. 63.1322 
(a) or (b), as appropriate, as required under 
Sec. 63.1335(e)(6)(iii)(D)(2).
    (c) Whenever a process change, as defined in Sec. 63.1323(i)(1), is 
made that causes a Group 2 batch process vent with annual emissions 
less than the level specified in Sec. 63.1323(d) that is in compliance 
with Sec. 63.1322(g) to have annual emissions greater than or equal to 
the level specified in Sec. 63.1323(d) but remains a Group 2 batch 
process vent, the owner or operator shall submit a report within 180 
operating days after the process change is made or the information 
regarding the process change is known to the owner or operator. This 
report may be included in the next Periodic Report, as specified in 
Sec. 63.1335(e)(6)(iii)(D)(2). The following information shall be 
submitted:
    (1) A description of the process change;
    (2) The results of the redetermination of the annual emissions, 
average flow rate, and cutoff flow rate required under Sec. 63.1323(i) 
and recorded under Sec. 63.1326 (a)(3) through (a)(5); and
    (3) The batch cycle limitation determined in accordance with 
Sec. 63.1322(f)(1).
    (d) Whenever a process change, as defined in Sec. 63.1323(j)(1), is 
made that causes the percent reduction for all process vents at a new 
SAN affected source using a batch process to be less than 84 percent, 
the owner or operator shall submit a report within 180 operating days 
after the process change is made or the information regarding the 
process change is known to the owner or operator. This report may be 
included in the next Periodic Report, as specified in 
Sec. 63.1335(e)(6)(iii)(D)(2). The following information shall be 
submitted:
    (1) A description of the process change; and
    (2) A schedule for compliance with the provisions of 
Sec. 63.1322(a)(3), as required under Sec. 63.1335(e)(6)(iii)(D)(2).
    (e) The owner or operator is not required to submit a report of a 
process change if one of the conditions specified in paragraphs (e)(1) 
and (e)(2) of this section is met.
    (1) The process change does not meet the description of a process 
change in Sec. 63.1323 (i) or (j).
    (2) The redetermined group status remains Group 2 for an individual 
batch process vent with annual emissions greater than or equal to the 
level specified in Sec. 63.1323(d), a Group 2 batch process vent with 
annual emissions less than the level specified in Sec. 63.1323(d) 
complying with Sec. 63.1322(g) continues to have emissions less than 
the level specified in Sec. 63.1323(d), or the achieved emission 
reduction remains at 84 percent or greater for new SAN affected sources 
using a batch process.
    (f) If an owner or operator uses a control device other than those 
specified in Sec. 63.1324(c) and listed in Table 7 of this subpart or 
requests approval to monitor a parameter other than those specified 
Sec. 63.1324(c) and listed in Table 7 of this subpart, the owner or 
operator shall submit a description of planned reporting and 
recordkeeping procedures, as specified in Sec. 63.1335(f), as part of 
the Precompliance Report required under Sec. 63.1335(e)(3). The 
Administrator will specify appropriate reporting and recordkeeping 
requirements as part of the review of the Precompliance Report.
    (g) Owners or operators complying with Sec. 63.1324(e), shall 
comply with paragraph (g)(1) or (g)(2) of this section, as appropriate.
    (1) Reports of the times of all periods recorded under 
Sec. 63.1326(e)(3) when the batch process vent is diverted from the 
control device through a bypass line.
    (2) Reports of all occurrences recorded under Sec. 63.1326(e)(4) in 
which the seal mechanism is broken, the bypass line valve position has 
changed, or the key to unlock the bypass line valve was checked out.


Sec. 63.1328  Heat exchange systems provisions.

    (a) This section applies to each affected source with the exception 
of each process contact cooling tower that is associated with an 
affected source manufacturing PET. The owner or operator of said 
affected source shall comply with Sec. 63.104, with the differences 
noted in paragraphs (b)

[[Page 48258]]

through (d) of this section, for the purposes of this subpart.
    (b) When the Periodic Report requirements contained in 
Sec. 63.152(c) are referred to in Sec. 63.104(b), the Periodic Report 
requirements contained in Sec. 63.1335(e)(6) shall apply for the 
purposes of this subpart.
    (c) When an owner or operator invokes the delay of repair 
provisions as specified in Sec. 63.104(b)(3), the information required 
by Sec. 63.104 (b)(4)(i) through (b)(4)(v) shall be included in the 
next semi-annual Periodic Report required under Sec. 63.1335(e)(6), for 
the purposes of this subpart. If the leak remains unrepaired, the 
information shall also be submitted in each subsequent Periodic Report, 
until the repair of the leak is reported.
    (d) The compliance date for heat exchange systems subject to the 
provisions of this section is specified in Sec. 63.1311.


Sec. 63.1329  Process contact cooling towers provisions.

    (a) This section applies to each new affected source that 
manufactures PET and each existing affected source that manufactures 
PET using a continuous terephthalic acid high viscosity multiple end 
finisher process. The owner or operator a new affected source shall 
comply with paragraph (b) of this section. The owner or operator of an 
existing affected source that manufactures PET using a continuous 
terephthalic acid high viscosity multiple end finisher process shall 
comply with paragraph (c) of this section. The compliance data for 
process contact cooling towers subject to the provisions of this 
section is specified in Sec. 63.1311.
    (b) New affected source requirements. The owner or operator of a 
new affected source subject to this section shall comply with 
paragraphs (b)(1) through (b)(2) of this section.
    (1) The owner or operator of a new affected source subject to this 
section shall not send contact condenser effluent associated with a 
vacuum system to a process contact cooling tower.
    (2) The owner or operator of a new affected source subject to this 
section shall indicate in the Notification of Compliance Status, as 
required in Sec. 63.1335(e)(5), that contact condenser effluent 
associated with vacuum systems is not sent to process contact cooling 
towers.
    (c) Existing affected source requirements. The owner or operator of 
an existing affected source subject to this section who manufactures 
PET using a continuous terephthalic acid high viscosity multiple end 
finisher process, and who is subject or becomes subject to 40 CFR part 
60, subpart DDD, shall maintain an ethylene glycol concentration in the 
cooling tower at or below 4.0 percent by weight averaged on a daily 
basis over a rolling 14-day period of operating days. Compliance with 
this paragraph (c) shall be determined as specified in paragraphs 
(c)(1) through (c)(4) of this section.
    (1) To determine the ethylene glycol concentration, owners or 
operators shall follow the procedures specified in 40 CFR 60.564(j)(1), 
except as provided in paragraph (c)(2) of this section.
    (i) At least one sample per operating day shall be collected using 
the procedures specified in 40 CFR 60.564(j)(1)(i). An average ethylene 
glycol concentration by weight shall be calculated on a daily basis 
over a rolling 14-day period of operating days. Each daily average 
ethylene glycol concentration so calculated constitutes a performance 
test. Exceedance of the standard during the reduced testing program 
specified in paragraph (b)(1)(ii) of this section is a violation of 
these standards.
    (ii) The owner or operator may elect to reduce the sampling program 
to any 14 consecutive day period once every two calendar months, if at 
least seventeen consecutive 14-day rolling average concentrations 
immediately preceding the reduced sampling program are each less than 
1.2 weight percent ethylene glycol. If the average concentration 
obtained over the 14 day sampling during the reduced test period 
exceeds the upper 95 percent confidence interval calculated from the 
most recent test results in which no one 14-day average exceeded 1.2 
weight percent ethylene glycol, then the owner or operator shall 
reinstitute a daily sampling program. The 95 percent confidence 
interval shall be calculated as specified in paragraph (b)(1)(iii) of 
this section. A reduced program may be reinstituted if the requirements 
specified in this paragraph (c)(1)(ii) are met.
    (iii) The upper 95 percent confidence interval shall be calculated 
using the Equation 27 of this subpart:
[GRAPHIC] [TIFF OMITTED] TR12SE96.026

where:

Xi = daily ethylene glycol concentration for each day used to 
calculate each 14-day rolling average used in test results to justify 
implementing the reduced testing program.
n = number of ethylene glycol concentrations.

    (2) Measuring an alternative parameter, such as carbon oxygen 
demand or biological oxygen demand, that is demonstrated to be directly 
proportional to the ethylene glycol concentration shall be allowed. 
Such parameter shall be measured during the initial 14-day performance 
test during which the facility is shown to be in compliance with the 
ethylene glycol concentration standard whereby the ethylene glycol 
concentration is determined using the procedures described in paragraph 
(b)(1) of this section. The alternative parameter shall be measured on 
a daily basis and the average value of the alternative parameter shall 
be calculated on a daily basis over a rolling 14-day period of 
operating days. Each daily average value of the alternative parameter 
constitutes a performance test.
    (3) During each performance test, daily measurement and daily 
average 14-day rolling averages of the ethylene glycol concentration in 
the cooling tower water shall be recorded. For the initial performance 
test, these records shall be submitted in the Notification of 
Compliance Status report.
    (4) All periods when the 14-day rolling average exceeds the 
standard shall be reported in the Periodic Report.


Sec. 63.1330  Wastewater provisions.

    (a) The owner or operator of each affected source shall comply with 
the requirements of Secs. 63.131 through 63.148, with the differences 
noted in paragraphs (a)(1) through (a)(12) of this section for the 
purposes of this subpart.
    (1) When the determination of equivalence criteria in 
Sec. 63.102(b) is referred to in Secs. 63.132, 63.133, and 63.137, the 
provisions in Sec. 63.6(g) shall apply.

[[Page 48259]]

    (2) When the storage tank requirements contained in Secs. 63.119 
through 63.123 are referred to in Secs. 63.132 through 63.148, 
Secs. 63.119 through 63.123 are applicable, with the exception of the 
differences referred to in Sec. 63.1314, for the purposes of this 
subpart.
    (3) When the owner or operator requests to use alternatives to the 
continuous operating parameter monitoring and recordkeeping provisions 
referred to in Sec. 63.151(g), or the owner or operator submits an 
operating permit application instead of an Implementation Plan as 
specified in Sec. 63.152(e), as referred to in Sec. 63.146(a)(3), 
Sec. 63.1335(g) and Sec. 63.1335(e)(8), respectively, shall apply for 
the purposes of this subpart.
    (4) When the Notification of Compliance Status requirements 
contained in Sec. 63.152(b) are referred to in Secs. 63.146 and 63.147, 
the Notification of Compliance Status requirements contained in 
Sec. 63.1335(e)(5) shall apply for the purposes of this subpart.
    (5) When the Periodic Report requirements contained in 
Sec. 63.152(c) are referred to in Secs. 63.146 and 63.147, the Periodic 
Report requirements contained in Sec. 63.1335(e)(6) shall apply for the 
purposes of this subpart.
    (6) When the Initial Notification Plan requirements in 
Sec. 63.151(b) are referred to in Sec. 63.146, the owner or operator of 
an affected source subject to this subpart need not comply for the 
purposes of this subpart.
    (7) When the Implementation Plan requirements contained in 
Sec. 63.151 are referred to in Sec. 63.146, the owner or operator of an 
affected source subject to this subpart need not comply for the 
purposes of this subpart.
    (8) When the term ``range'' is used in Sec. 63.143(f), the term 
``level'' shall be used instead for the purposes of this subpart. This 
level shall be determined using the procedures specified in 
Sec. 63.1334.
    (9) For the purposes of this subpart, owners or operators are not 
required to comply with the provisions of Sec. 63.138(e)(2) which 
specify that owners or operators shall demonstrate that 95 percent of 
the mass of HAP, as listed in Table 9 of subpart G of this part, is 
removed from the wastewater stream or combination of wastewater streams 
by the procedure specified in Sec. 63.145(i) for a biological treatment 
unit.
    (10) For the purposes of this subpart, owners or operators are not 
required to comply with the provisions of Sec. 63.138(j)(3) which 
specify that owners or operators shall use the procedures specified in 
appendix C of this part to demonstrate compliance when using a 
biological treatment unit.
    (11) When the provisions of Sec. 63.139(c)(1)(ii) or the provisions 
of Sec. 63.145(e)(2)(ii)(B) specify that Method 18, 40 CFR part 60, 
appendix A, shall be used, Method 18 or Method 25A, 40 CFR part 60, 
appendix A, may be used for the purposes of this subpart. The use of 
Method 25A, 40 CFR part 60, appendix A, shall comply with paragraphs 
(a)(11)(i) and (a)(11)(ii) of this section.
    (i) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A, shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (ii) The use of Method 25A, 40 CFR part 60, appendix A, is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (12) The compliance date for the affected source subject to the 
provisions of this section is specified in Sec. 63.1311.
    (b) For each affected source, the owner or operator shall comply 
with the requirements for maintenance wastewater in Sec. 63.105, except 
that when Sec. 63.105(a) refers to ``organic HAPs,'' the definition of 
organic HAP in Sec. 63.1312 shall apply for the purposes of this 
subpart.


Sec. 63.1331  Equipment leak provisions.

    (a) Except as provided for in paragraphs (b) and (c) of this 
section, the owner or operator of each affected source shall comply 
with the requirements of subpart H of this part, with the differences 
noted in paragraphs (a)(1) through (a)(9) of this section.
    (1) For an affected source producing polystyrene resin, the 
indications of liquids dripping, as defined in subpart H of this part, 
from bleed ports in pumps and agitator seals in light liquid service 
shall not be considered to be a leak. For purposes of this subpart, a 
``bleed port'' is a technologically-required feature of the pump or 
seal whereby polymer fluid used to provide lubrication and/or cooling 
of the pump or agitator shaft exits the pump, thereby resulting in a 
visible dripping of fluid.
    (2) The compliance date for the equipment leak provisions contained 
in this section is provided in Sec. 63.1311.
    (3) Owners and operators of an affected source subject to this 
subpart are not required to submit the Initial Notification required by 
Sec. 63.182(a)(1) and Sec. 63.182(b).
    (4) The Notification of Compliance Status required by paragraphs 
Sec. 63.182(a)(2) and Sec. 63.182(c) shall be submitted within 150 days 
(rather than 90 days) of the applicable compliance date specified in 
Sec. 63.1311 for the equipment leak provisions. Said notification can 
be submitted as part of the Notification of Compliance Status required 
by Sec. 63.1335(e)(5).
    (5) The Periodic Reports required by Sec. 63.182(a)(3) and 
Sec. 63.182(d) may be submitted as part of the Periodic Reports 
required by Sec. 63.1335(e)(6).
    (6) For an affected source producing PET, an owner or operator 
shall comply with the requirements of paragraphs (a)(6)(i) and 
(a)(6)(ii) of this section instead of with the requirements of 
Sec. 63.169 for pumps, valves, connectors, and agitators in heavy 
liquid service; pressure relief devices in light liquid or heavy liquid 
service; and instrumentation systems.
    (i) A leak is determined to be detected if there is evidence of a 
potential leak found by visual, audible, olfactory, or any other 
detection method except that Method 21, 40 CFR part 60, appendix A 
shall not be used to determine if a leak is detected.
    (ii)(A) When a leak is detected, it shall be repaired as soon as 
practicable, but not later than 15 calendar days after it is detected, 
except as provided in Sec. 63.171.
    (B) The first attempt at repair shall be made no later than 5 
calendar days after each leak is detected.
    (C) Repaired shall mean that the visual, audible, olfactory, or 
other indications of a leak have been eliminated; that no bubbles are 
observed at potential leak sites during a leak check using soap 
solution; or that the system will hold a test pressure.
    (7) For each affected source producing PET, an owner or operator is 
not required to develop an initial list of identification numbers for 
the equipment identified in paragraph (a)(6) of this section (i.e., 
pumps, valves, connectors, and agitators in heavy liquid service; 
pressure relief devices in light liquid or heavy liquid service; and 
instrumentation systems) as would otherwise be required under 
Sec. 63.181(b)(1)(i).
    (8) When the provisions of subpart H of this part specify that 
Method 18, 40 CFR part 60, appendix A, shall be used, Method 18 or 
Method 25A, 40 CFR part 60, appendix A, may be used for the purposes of 
this subpart. The use of Method 25A, 40 CFR part 60, appendix A, shall 
comply with paragraphs (a)(8)(i) and (a)(8)(ii) of this section.
    (i) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A, shall be the single organic HAP representing 
the largest percent by volume of the emissions.

[[Page 48260]]

    (ii) The use of Method 25A, 40 CFR part 60, appendix A, is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (9) For purposes of this subpart, bottoms receivers and surge 
control vessels are not considered equipment for purposes of this 
section and are not subject to the requirements of subpart H of this 
part.
    (b) The provisions of this section do not apply to each TPPU 
producing PET using a process other than a continuous terephthalic acid 
(TPA) high viscosity multiple end finisher process that is part of an 
affected source if all of the components in the TPPU are either in 
vacuum service or in heavy liquid service.
    (1) Owners and operators of a TPPU exempted under paragraph (b) of 
this section shall retain at the facility information, data, and 
analyses used to demonstrate that all of the components in the exempted 
TPPU are either in vacuum service or in heavy liquid service. Such 
documentation shall include an analysis or demonstration that the 
process fluids do not meet the criteria of ``in light liquid service'' 
or ``in gas or vapor service.'' Examples of information that could 
document this include, but are not limited to, records of chemicals 
purchased for the process, analyses of process stream composition, 
engineering calculations, or process knowledge.
    (2) If changes occur at a TPPU exempted under paragraph (b) of this 
section such that all of the components in the TPPU are no longer 
either in vacuum service or in heavy liquid service (e.g., by either 
process changes or the addition of new components), the owner or 
operator shall comply with the provisions of this section for all of 
the components at the TPPU. The owner or operator shall submit a report 
within 180 days after the process change is made or the information 
regarding the process change is known to the owner or operator. This 
report may be included in the next Periodic Report, as specified in 
paragraph (a)(5) of this section. The following information shall be 
submitted:
    (i) A description of the process change; and
    (ii) A schedule for compliance with the provisions of 
Sec. 63.1331(a), as specified in paragraphs (b)(2)(ii)(A) and 
(b)(2)(ii)(B) of this section.
    (A) The owner or operator shall submit to the Administrator for 
approval a compliance schedule and a justification for the schedule.
    (B) The Administrator shall approve the compliance schedule or 
request changes within 120 operating days of receipt of the compliance 
schedule and justification.
    (c) The provisions of this section do not apply to each affected 
source producing PET using a continuous TPA high viscosity multiple end 
finisher process.


Sec. 63.1332  Emissions averaging provisions.

    (a) This section applies to owners or operators of existing 
affected sources who seek to comply with Sec. 63.1313(b) by using 
emissions averaging rather than following the provisions of 
Secs. 63.1314, 63.1315, 63.1316 through 63.1320, 63.1321, and 63.1330.
    (1) The following emission point limitations apply to the use of 
these provisions:
    (i) All emission points included in an emissions average shall be 
from the same affected source. There may be an emissions average for 
each affected source located at a plant site.
    (ii)(A) If a plant site has only one affected source for which 
emissions averaging is being used to demonstrate compliance, the number 
of emission points allowed in the emissions average for said affected 
source is limited to twenty. This number may be increased by up to five 
additional emission points if pollution prevention measures are used to 
control five or more of the emission points included in the emissions 
average.
    (B) If a plant site has two or more affected sources for which 
emissions averaging is being used to demonstrate compliance, the number 
of emission points allowed in the emissions averages for said affected 
sources is limited to twenty. This number may be increased by up to 
five additional emission points if pollution prevention measures are 
used to control five or more of the emission points included in the 
emissions averages.
    (2) Compliance with the provisions of this section can be based on 
either organic HAP or TOC.
    (3) For the purposes of these provisions, whenever Method 18, 40 
CFR part 60, appendix A is specified within the paragraphs of this 
section or is specified by reference through provisions outside this 
section, Method 18 or Method 25A, 40 CFR part 60, appendix A may be 
used. The use of Method 25A, 40 CFR part 60, appendix A shall comply 
with paragraphs (a)(3)(i) and (a)(3)(ii) of this section.
    (i) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A shall be the single organic HAP representing 
the largest percent by volume of the emissions.
    (ii) The use of Method 25A, 40 CFR part 60, appendix A is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (b) Unless an operating permit application has been submitted, the 
owner or operator shall develop and submit for approval an Emissions 
Averaging Plan containing all of the information required in 
Sec. 63.1335(e)(4) for all emission points to be included in an 
emissions average.
    (c) Paragraphs (c)(1) through (c)(5) of this section describe the 
emission points that can be used to generate emissions averaging 
credits if control was applied after November 15, 1990, and if 
sufficient information is available to determine the appropriate value 
of credits for the emission point. Paragraph (c)(6) of this section 
discusses the use of pollution prevention in generating emissions 
averaging credits.
    (1) Storage vessels, batch process vents, aggregate batch vent 
streams, continuous process vents subject to Sec. 63.1315, and process 
wastewater streams that are determined to be Group 2 emission points. 
The term ``continuous process vents subject to Sec. 63.1315'' includes 
continuous process vents subject to Sec. 63.1316 (b)(1)(iii), 
(b)(2)(iii), and (c)(2), which reference Sec. 63.1315.
    (2) Continuous process vents located in the collection of material 
recovery sections within the affected source at an existing affected 
source producing PET using a continuous dimethyl terephthalate process 
subject to Sec. 63.1316(b)(1)(i) where the uncontrolled organic HAP 
emissions from said continuous process vents are equal to or less than 
0.12 kg organic HAP per Mg of product. These continuous process vents 
shall be considered Group 2 emission points for the purposes of this 
section.
    (3) Storage vessels, continuous process vents subject to 
Sec. 63.1315, and process wastewater streams that are determined to be 
Group 1 emission points and that are controlled by a technology that 
the Administrator or permitting authority agrees has a higher nominal 
efficiency than the reference control technology. Information on the 
nominal efficiencies for such technologies must be submitted and 
approved as provided in paragraph (i) of this section.
    (4) Batch process vents and aggregate batch vent streams that are 
determined to be Group 1 emission points and that

[[Page 48261]]

are controlled to a level more stringent than the applicable standard.
    (5) Continuous process vents subject to Sec. 63.1316 (b)(1)(i), 
(b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) located in the collection 
of process sections within the affected source, as specified in 
paragraphs (c)(5)(i) through (c)(5)(ii) of this section. The continuous 
process vents identified in paragraphs (c)(5)(i) through (c)(5)(ii) of 
this section shall be considered to be Group 1 emission points for the 
purposes of this section.
    (i) Continuous process vents subject to Sec. 63.1316(b)(1)(i) 
located in the collection of material recovery sections within the 
affected source where the uncontrolled organic HAP emissions for said 
continuous process vents are greater than 0.12 kg organic HAP per Mg of 
product and said continuous process vents are controlled to a level 
more stringent than the applicable standard.
    (ii) Continuous process vents subject to Sec. 63.1316(b)(1)(ii), 
(b)(2)(i), (b)(2)(ii), or (c)(1) located in the collection of process 
sections within the affected source where the uncontrolled organic HAP 
emissions from said continuous process vents are controlled to a level 
more stringent than the applicable standard.
    (6) The percent reduction for any storage vessel, batch process 
vent, aggregate batch vent stream, continuous process vent, and process 
wastewater stream from which emissions are reduced by pollution 
prevention measures shall be determined using the procedures specified 
in paragraph (j) of this section.
    (i) For a Group 1 storage vessel, batch process vent, aggregate 
batch vent stream, continuous process vent, or process wastewater 
stream, the pollution prevention measure must reduce emissions more 
than if the applicable reference control technology or standard had 
been applied to the emission point instead of the pollution prevention 
measure, except as provided in paragraph (c)(6)(ii) of this section.
    (ii) If a pollution prevention measure is used in conjunction with 
other controls for a Group 1 storage vessel, batch process vent, 
aggregate batch vent stream, continuous process vent, or process 
wastewater stream, the pollution prevention measure alone does not have 
to reduce emissions more than the applicable reference control 
technology or standard, but the combination of the pollution prevention 
measure and other controls must reduce emissions more than if the 
applicable reference control technology or standard had been applied 
instead of the pollution prevention measure.
    (d) The following emission points cannot be used to generate 
emissions averaging credits:
    (1) Emission points already controlled on or before November 15, 
1990, cannot be used to generate credits unless the level of control is 
increased after November 15, 1990. In this case, credit will be allowed 
only for the increase in control after November 15, 1990.
    (2) Group 1 emission points, identified in paragraph (c)(3) of this 
section, that are controlled by a reference control technology cannot 
be used to generate credits unless the reference control technology has 
been approved for use in a different manner and a higher nominal 
efficiency has been assigned according to the procedures in paragraph 
(i) of this section.
    (3) Emission points for nonoperating TPPU cannot be used to 
generate credits. TPPU that are shutdown cannot be used to generate 
credits or debits.
    (4) Maintenance wastewater cannot be used to generate credits. 
Wastewater streams treated in biological treatment units cannot be used 
to generate credits. These two types of wastewater cannot be used to 
generate credits or debits. For the purposes of this section, the terms 
wastewater and wastewater stream are used to mean process wastewater.
    (5) Emission points controlled to comply with a State or Federal 
rule other than this subpart cannot be used to generate credits, unless 
the level of control has been increased after November 15, 1990, to a 
level above what is required by the other State or Federal rule. Only 
the control above what is required by the other State or Federal rule 
will be credited. However, if an emission point has been used to 
generate emissions averaging credit in an approved emissions average, 
and the emission point is subsequently made subject to a State or 
Federal rule other than this subpart, the emission point can continue 
to generate emissions averaging credit for the purpose of complying 
with the previously approved emissions average.
    (e) For all emission points included in an emissions average, the 
owner or operator shall perform the following tasks:
    (1) Calculate and record monthly debits for all Group 1 emission 
points that are controlled to a level less stringent than the reference 
control technology or standard for those emission points. Said Group 1 
emission points are identified in paragraphs (c)(3) through (c)(5) of 
this section. Equations in paragraph (g) of this section shall be used 
to calculate debits.
    (2) Calculate and record monthly credits for all Group 1 and Group 
2 emission points that are over-controlled to compensate for the 
debits. Equations in paragraph (h) of this section shall be used to 
calculate credits. Emission points and controls that meet the criteria 
of paragraph (c) of this section may be included in the credit 
calculation, whereas those described in paragraph (d) of this section 
shall not be included.
    (3) Demonstrate that annual credits calculated according to 
paragraph (h) of this section are greater than or equal to debits 
calculated for the same annual compliance period according to paragraph 
(g) of this section.
    (i) The owner or operator may choose to include more than the 
required number of credit-generating emission points in an emissions 
average in order to increase the likelihood of being in compliance.
    (ii) The initial demonstration in the Emissions Averaging Plan or 
operating permit application that credit-generating emission points 
will be capable of generating sufficient credits to offset the debits 
from the debit-generating emission points must be made under 
representative operating conditions. After the compliance date, actual 
operating data will be used for all debit and credit calculations.
    (4) Demonstrate that debits calculated for a quarterly (3-month) 
period according to paragraph (g) of this section are not more than 
1.30 times the credits for the same period calculated according to 
paragraph (h) of this section. Compliance for the quarter shall be 
determined based on the ratio of credits and debits from that quarter, 
with 30 percent more debits than credits allowed on a quarterly basis.
    (5) Record and report quarterly and annual credits and debits in 
the Periodic Reports as specified in Sec. 63.1335(e)(6). Every fourth 
Periodic Report shall include a certification of compliance with the 
emissions averaging provisions as required by 
Sec. 63.1335(e)(6)(vi)(D)(2).
    (f) Debits and credits shall be calculated in accordance with the 
methods and procedures specified in paragraphs (g) and (h) of this 
section, respectively, and shall not include emissions during the 
following periods:
    (1) Emissions during periods of start-up, shutdown, and 
malfunction, as described in the Start-up, Shutdown, and Malfunction 
Plan.
    (2) Emissions during periods of monitoring excursions, as defined 
in Sec. 63.1334(d). For these periods, the calculation of monthly 
credits and debits shall be adjusted as specified in

[[Page 48262]]

paragraphs (f)(2)(i) through (f)(2)(iii) of this section.
    (i) No credits would be assigned to the credit-generating emission 
point.
    (ii) Maximum debits would be assigned to the debit-generating 
emission point.
    (iii) The owner or operator may demonstrate to the Administrator 
that full or partial credits or debits should be assigned using the 
procedures in paragraph (l) of this section.
    (g) Debits are generated by the difference between the actual 
emissions from a Group 1 emission point that is uncontrolled or is 
controlled to a level less stringent than the applicable reference 
control technology or standard and the emissions allowed for the Group 
1 emission point. Said Group 1 emission points are identified in 
paragraphs (c)(3) through (c)(5) of this section. Debits shall be 
calculated as follows:
    (1) Source-wide debits shall be calculated using Equation 28 of 
this subpart. Debits and all terms of Equation 28 of this subpart are 
in units of megagrams per month.
[GRAPHIC] [TIFF OMITTED] TR12SE96.027

where:

ECPViACTUAL=Emissions from each Group 1 continuous process vent i 
subject to Sec. 63.1315 that is uncontrolled or is controlled to a 
level less stringent than the applicable reference control technology. 
ECPViACTUAL is calculated according to paragraph (g)(2) of this 
section.
(0.02)ECPViu=Emissions from each Group 1 continuous process vent i 
subject to Sec. 63.1315 if the applicable reference control technology 
had been applied to the uncontrolled emissions. ECPViu is 
calculated according to paragraph (g)(2) of this section.
ECPVSjACTUAL=Emissions from Group 1 continuous process vents 
subject to Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), 
or (c)(1) located in the collection of process sections j within the 
affected source that are uncontrolled or controlled to a level less 
stringent than the applicable standard. ECPVSjACTUAL is calculated 
according to paragraph (g)(3) of this section.
ECPVSjSTD=Emissions from Group 1 continuous process vents subject 
to Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) 
located in the collection of process sections j within the affected 
source if the applicable standard had been applied to the uncontrolled 
emissions. ECPVSjSTD is calculated according to paragraph (g)(3) 
of this section.
ESiACTUAL=Emissions from each Group 1 storage vessel i that is 
uncontrolled or is controlled to a level less stringent than the 
applicable reference control technology or standard. ESiACTUAL is 
calculated according to paragraph (g)(4) of this section.
(BL)ESiu=Emissions from each Group 1 storage vessel i if the 
applicable reference control technology or standard had been applied to 
the uncontrolled emissions. ESiu is calculated according to 
paragraph (g)(4) of this section. For calculating emissions, BL=0.05 
for each Group 1 storage vessel i subject to Sec. 63.1314(a); and 
BL=0.02 for each storage vessel i subject to Sec. 63.1314(c).
EWWiACTUAL=Emissions from each Group 1 wastewater stream i that is 
uncontrolled or is controlled to a level less stringent than the 
applicable reference control technology. EWWiACTUAL is calculated 
according to paragraph (g)(5) of this section.
EWWic=Emissions from each Group 1 wastewater stream i if the 
reference control technology had been applied to the uncontrolled 
emissions. EWWic is calculated according to paragraph (g)(5) of 
this section.
EBPViACTUAL=Emissions from each Group 1 batch process vent i that 
is uncontrolled or is controlled to a level less stringent than the 
applicable reference control technology. EBPViiACTUAL is 
calculated according to paragraph (g)(6) of this section.
(0.10)EBPViu=Emissions from each Group 1 batch process vent i if 
the applicable reference control technology had been applied to the 
uncontrolled emissions. EBPViu is calculated according to 
paragraph (g)(6) of this section.
EABViACTUAL=Emissions from each Group 1 aggregate batch vent 
stream i that is uncontrolled or is controlled to a level less 
stringent than the applicable reference control technology. 
EBPViiACTUAL is calculated according to paragraph (g)(7) of this 
section.
(0.10)EABViu=Emissions from each Group 1 aggregate batch vent 
stream i if the applicable reference control technology had been 
applied to the uncontrolled emissions. EBPViu is calculated 
according to paragraph (g)(7) of this section.
n=The number of emission points being included in the emissions 
average.

    (2) Emissions from continuous process vents subject to Sec. 63.1315 
shall be calculated as follows:
    (i) For purposes of determining continuous process vent stream flow 
rate, organic HAP concentrations, and temperature, the sampling site 
shall be after the final product recovery device, if any recovery 
devices are present; before any control device (for continuous process 
vents, recovery devices shall not be considered control devices); and 
before discharge to the atmosphere. Method 1 or 1A, 40 CFR

[[Page 48263]]

part 60, appendix A, shall be used for selection of the sampling site.
    (ii) ECPViu for each continuous process vent i shall be 
calculated using Equation 29 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.028

where:

ECPViu=Uncontrolled continuous process vent emission rate from 
continuous process vent i, megagrams per month.
Q=Vent stream flow rate, dry standard cubic meters per minute, measured 
using Method 2, 2A, 2C, or 2D, 40 CFR part 60, appendix A, as 
appropriate.
h=Monthly hours of operation during which positive flow is present in 
the continuous process vent, hours per month.
Cj=Concentration, parts per million by volume, dry basis, of organic 
HAP j as measured by Method 18, 40 CFR part 60, appendix A.
Mj=Molecular weight of organic HAP j, gram per gram-mole.
n=Number of organic HAP in stream.

    (A) The values of Q and Cj shall be determined during a performance 
test conducted under representative operating conditions. The values of 
Q and Cj shall be established in the Notification of Compliance Status 
and must be updated as provided in paragraph (g)(2)(ii)(B) of this 
section.
    (B) If there is a change in capacity utilization other than a 
change in monthly operating hours, or if any other change is made to 
the process or product recovery equipment or operation such that the 
previously measured values of Q and Cj are no longer representative, a 
new performance test shall be conducted to determine new representative 
values of Q and Cj. These new values shall be used to calculate debits 
and credits from the time of the change forward, and the new values 
shall be reported in the next Periodic Report.
    (iii) The following procedures and equations shall be used to 
calculate ECPViACTUAL:
    (A) If the continuous process vent is not controlled by a control 
device or pollution prevention measure, ECPViACTUAL=ECPViu, 
where ECPViu is calculated according to the procedures in 
paragraphs (g)(2)(i) and (g)(2)(ii) of this section.
    (B) If the continuous process vent is controlled using a control 
device or a pollution prevention measure achieving less than 98 percent 
reduction, calculate ECPViACTUAL using Equation 30 of this 
subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.029

    (1) The percent reduction shall be measured according to the 
procedures in Sec. 63.116 if a combustion control device is used. For a 
flare meeting the criteria in Sec. 63.116(a), or a boiler or process 
heater meeting the criteria in Sec. 63.116(b), the percent reduction 
shall be 98 percent. If a noncombustion control device is used, percent 
reduction shall be demonstrated by a performance test at the inlet and 
outlet of the device, or, if testing is not feasible, by a control 
design evaluation and documented engineering calculations.
    (2) For determining debits from Group 1 continuous process vents, 
product recovery devices shall not be considered control devices and 
cannot be assigned a percent reduction in calculating ECPViACTUAL. 
The sampling site for measurement of uncontrolled emissions is after 
the final product recovery device. However, as provided in 
Sec. 63.113(a)(3), a Group 1 continuous process vent may add sufficient 
product recovery to raise the TRE index value above 1.0 or, for Group 1 
continuous process vents at an existing affected source producing MBS, 
above 3.7, thereby becoming a Group 2 continuous process vent. Such a 
continuous process vent would not be a Group 1 continuous process vent 
and would, therefore, not be included in determining debits under this 
paragraph (g)(2)(iii)(B)(2).
    (3) Procedures for calculating the percent reduction of pollution 
prevention measures are specified in paragraph (j) of this section.
    (3) Emissions from continuous process vents located in the 
collection of process sections within the affected source subject to 
Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) 
shall be calculated as follows:
    (i) The total organic HAP emissions from continuous process vents 
located in the collection of process sections j within the affected 
source, ECPVSjACTUAL, shall be calculated as follows. The 
procedures in paragraph (g)(2)(iii) of this section shall be used to 
determine the organic HAP emissions for each individual continuous 
process vent, except that paragraph (g)(2)(iii)(B)(2) of this section 
shall not apply and the sampling site shall be after those recovery 
devices installed as part of normal operation; before any add-on 
control devices (i.e., those required by regulation); and prior to 
discharge to the atmosphere. Then, individual continuous process vent 
emissions shall be summed to determine ECPVSjACTUAL.
    (ii)(A) ECPVSjstd shall be calculated using Equation 31 of this 
subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.030

where:

ECPVSjstd=Emissions if the applicable standard had been applied to 
the uncontrolled emissions, megagrams per month.
EFstd=0.000018 Mg organic HAP/Mg of product, if the collection of 
process sections within the affected source is subject to 
Sec. 63.1316(b)(1)(i).
    =0.00002 Mg organic HAP/Mg of product, if the collection of process 
sections within the affected source is subject to Sec. 63.1316 
(b)(1)(ii) or (b)(2)(ii).
    =0.00004 Mg organic HAP/Mg of product, if the collection of process 
sections within the affected source is subject to 
Sec. 63.1316(b)(2)(i).
    =0.0000036 Mg organic HAP/Mg of product, if the collection of 
process sections within the affected source is subject to 
Sec. 63.1316(c)(1).

[[Page 48264]]

PPj=Polymer produced, Mg/month, for the collection of process sections 
j within the affected source, as calculated according to paragraph 
(g)(3)(ii)(B) of this section.

    (B) The amount of polymer produced, Mg per month, for the 
collection of process sections j within the affected source shall be 
determined by determining the weight of polymer pulled from the process 
line(s) during a 30-day period. The polymer produced shall be 
determined by direct measurement or by an alternate methodology, such 
as materials balance. If an alternate methodology is used, a 
description of the methodology, including all procedures, data, and 
assumptions shall be submitted as part of the Emissions Averaging Plan 
required by Sec. 63.1335(e)(4).
    (C) Alternatively, ECPVSjstd for continuous process vents 
located in the collection of process sections within the affected 
source subject to Sec. 63.1316(c)(1) may be calculated using the 
procedures in paragraph (g)(2)(i) and (g)(2)(ii) of this section to 
determine the organic HAP emissions for each individual continuous 
process vent, except that the sampling site shall be after recovery 
devices installed as part of normal operation; before any add-on 
control devices (i.e., those required by regulation); and prior to 
discharge to the atmosphere. Then, individual continuous process vent 
emissions shall be summed and multiplied by 0.02 to determine 
ECPVSjstd.
    (4) Emissions from storage vessels shall be calculated using the 
procedures specified in Sec. 63.150(g)(3).
    (5) Emissions from wastewater streams shall be calculated using the 
procedures in Sec. 63.150(g)(5).
    (6) Emissions from batch process vents shall be calculated as 
follows:
    (i) EBPViu for each batch process vent i shall be calculated 
using the procedures specified in Sec. 63.1323(b).
    (ii) The following procedures and equations shall be used to 
determine EBPViACTUAL:
    (A) If the batch process vent is not controlled by a control device 
or pollution prevention measure, EBPViACTUAL=EBPViu, where 
EBPViu is calculated using the procedures in Sec. 63.1323(b).
    (B) If the batch process vent is controlled using a control device 
or a pollution prevention measure achieving less than 90 percent 
reduction for the batch cycle, calculate EBPViACTUAL using 
Equation 32 of this subpart, where percent reduction is for the batch 
cycle.
[GRAPHIC] [TIFF OMITTED] TR12SE96.031

    (1) The percent reduction for the batch cycle shall be calculated 
according to the procedures in Sec. 63.1325(c)(2).
    (2) The percent reduction for control devices shall be calculated 
according to the procedures in Sec. 63.1325 (c)(2)(i) through 
(c)(2)(iii).
    (3) The percent reduction of pollution prevention measures shall be 
calculated using the procedures specified in paragraph (j) of this 
section.
    (7) Emissions from aggregate batch vent streams shall be calculated 
as follows:
    (i) For purposes of determining aggregate batch vent stream flow 
rate, organic HAP concentrations, and temperature, the sampling site 
shall be before any control device and before discharge to the 
atmosphere. Method 1 or 1A, 40 CFR part 60, appendix A, shall be used 
for selection of the sampling site.
    (ii) EABViu for each aggregate batch vent stream i shall be 
calculated using Equation 33 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.032

where:

EABViu=Uncontrolled aggregate batch vent stream emission rate from 
aggregate batch vent stream i, megagrams per month.
Q=Vent stream flow rate, dry standard cubic meters per minute, measured 
using Method 2, 2A, 2C, or 2D, 40 CFR part 60, appendix A, as 
appropriate.
h=Monthly hours of operation during which positive flow is present from 
the aggregate batch vent stream, hours per month.
Cj=Concentration, parts per million by volume, dry basis, of 
organic HAP j as measured by Method 18, 40 CFR part 60, appendix A.
Mj=Molecular weight of organic HAP j, gram per gram-mole.
n=Number of organic HAP in the stream.

    (A) The values of Q and Cj shall be determined during a 
performance test conducted under representative operating conditions. 
The values of Q and Cj shall be established in the Notification of 
Compliance Status and must be updated as provided in paragraph 
(g)(7)(ii)(B) of this section.
    (B) If there is a change in capacity utilization other than a 
change in monthly operating hours, or if any other change is made to 
the process or product recovery equipment or operation such that the 
previously measured values of Q and Cj are no longer 
representative, a new performance test shall be conducted to determine 
new representative values of Q and Cj. These new values shall be 
used to calculate debits and credits from the time of the change 
forward, and the new values shall be reported in the next Periodic 
Report.
    (iii) The following procedures and equations shall be used to 
calculate EABViACTUAL:
    (A) If the aggregate batch vent stream is not controlled by a 
control device or pollution prevention measure, EABViACTUAL = 
EABViu, where EABViu is calculated according to the 
procedures in paragraphs (g)(7)(i) and (g)(7)(ii) of this section.
    (B) If the aggregate batch vent stream is controlled using a 
control device or a pollution prevention measure achieving less than 90 
percent reduction, calculate EABViACTUAL using Equation 34 of this 
subpart.

[[Page 48265]]

[GRAPHIC] [TIFF OMITTED] TR12SE96.033


    (1) The percent reduction for control devices shall be determined 
according to the procedures in Sec. 63.1325(e).
    (2) The percent reduction for pollution prevention measures shall 
be calculated according to the procedures specified in paragraph (j) of 
this section.
    (h) Credits are generated by the difference between emissions that 
are allowed for each Group 1 and Group 2 emission point and the actual 
emissions from that Group 1 or Group 2 emission point that has been 
controlled after November 15, 1990 to a level more stringent than what 
is required by this subpart or any other State or Federal rule or 
statute. Said Group 1 and Group 2 emission points are identified in 
paragraphs (c)(1) through (c)(5) of this section. Credits shall be 
calculated using Equation 35 of this subpart.
    (1) Sourcewide credits shall be calculated using Equation 35 of 
this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.034

Credits and all terms of Equation 35 of this subpart are in units of 
megagrams per month, the baseline date is November 15, 1990.
where:

D=Discount factor=0.9 for all credit generating emission points except 
those controlled by a pollution prevention measure; discount factor=1.0 
for each credit generating emission point controlled by a pollution 
prevention measure (i.e., no discount provided).
ECPV1iACTUAL=Emissions for each Group 1 continuous process vent i 
subject to Sec. 63.1315 that is controlled to a level more stringent 
than the reference control technology. ECPV1iACTUAL is calculated 
according to paragraph (h)(2) of this section.
(0.02)ECPV1iu=Emissions from each Group 1 continuous process vent 
i subject to Sec. 63.1315 if the applicable reference control 
technology had been applied to the uncontrolled emissions. ECPV1iu 
is calculated according to paragraph (h)(2) of this section.

[[Page 48266]]

ECPVS1jSTD=Emissions from Group 1 continuous process vents subject 
to Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) 
located in the collection of process sections j within the affected 
source if the applicable standard had been applied to the uncontrolled 
emissions. ECPVS1jSTD is calculated according to paragraph (h)(3) 
of this section.
ECPVS1jACTUAL=Emissions from Group 1 continuous process vents 
subject to Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), 
or (c)(1) located in the collection of process sections j within the 
affected source that are controlled to a level more stringent than the 
applicable standard. ECPVS1jACTUAL is calculated according to 
paragraph (h)(3) of this section.
ECPV2iACTUAL=Emissions from each Group 2 continuous process vent i 
subject to Sec. 63.1315 that is controlled. ECPV2iACTUAL is 
calculated according to paragraph (h)(2) of this section.
ECPV2iBASE=Emissions from each Group 2 continuous process vent i 
subject to Sec. 63.1315 at the baseline date. ECPV2iBASE is 
calculated according to paragraph (h)(2) of this section.
ECPVS2jBASE=Emissions from Group 2 continuous process vents 
subject to Sec. 63.1316(b)(1)(i) located in the collection of material 
recovery sections j within the affected source at the baseline date. 
ECPVS2jBASE is calculated according to paragraph (h)(3) of this 
section.
ECPVS2jACTUAL=Emissions from Group 2 continuous process vents 
subject to Sec. 63.1316(b)(1)(i) located in the collection of material 
recovery sections j within the affected source that are controlled. 
ECPVS2jACTUAL is calculated according to paragraph (h)(3) of this 
section.
ES1iACTUAL=Emissions from each Group 1 storage vessel i that is 
controlled to a level more stringent than the applicable reference 
control technology or standard. ES1iACTUAL is calculated according 
to paragraph (h)(4) of this section.
(BL)ES1iu=Emissions from each Group 1 storage vessel i if the 
applicable reference control technology or standard had been applied to 
the uncontrolled emissions. ES1iu is calculated according to 
paragraph (h)(4) of this section. For calculating these emissions, 
BL=0.05 for each Group 1 storage vessel i subject to Sec. 63.1314(a); 
and BL=0.02 for each storage vessel i subject to Sec. 63.1314(c).
ES2iACTUAL=Emissions from each Group 2 storage vessel i that is 
controlled. ES2iACTUAL is calculated according to paragraph (h)(4) 
of this section.
ES2iBASE=Emissions from each Group 2 storage vessel i at the 
baseline date. ES2iBASE is calculated according to paragraph 
(h)(4) of this section.
EWW1iACTUAL=Emissions from each Group 1 wastewater stream i that 
is controlled to a level more stringent than the reference control 
technology. EWW1iACTUAL is calculated according to paragraph 
(h)(5) of this section.
EWW1ic=Emissions from each Group 1 wastewater stream i if the 
reference control technology had been applied to the uncontrolled 
emissions. EWW1ic is calculated according to paragraph (h)(5) of 
this section.
EWW2iACTUAL=Emissions from each Group 2 wastewater stream i that 
is controlled. EWW2iACTUAL is calculated according to paragraph 
(h)(5) of this section.
EWW2iBASE=Emissions from each Group 2 wastewater stream i at the 
baseline date. EWW2iBASE is calculated according to paragraph 
(h)(5) of this section.
(0.10)EBPV1iu=Emissions from each Group 1 batch process vent i if 
the applicable reference control technology had been applied to the 
uncontrolled emissions. EBPV1iu is calculated according to 
paragraph (h)(6) of this section.
EBPV1iACTUAL=Emissions from each Group 1 batch process vent i that 
is controlled to a level more stringent than the reference control 
technology. EBPV1iACTUAL is calculated according to paragraph 
(h)(6) of this section.
(0.10)EABV1iu=Emissions from each Group 1 aggregate batch vent 
stream i if the applicable reference control technology had been 
applied to the uncontrolled emissions. EABV1iu is calculated 
according to paragraph (h)(7) of this section.
EABV1iACTUAL=Emissions from each Group 1 aggregate batch vent 
stream i that is controlled to a level more stringent than the 
reference control technology. EABV1iACTUAL is calculated according 
to paragraph (h)(7) of this section.
EBPV2iBASE=Emissions from each Group 2 batch process vent i at the 
baseline date. EBPV2iBASE is calculated according to paragraph 
(h)(6) of this section.
EBPV2iACTUAL=Emissions from each Group 2 batch process vent i that 
is controlled. EBPV2iACTUAL is calculated according to paragraph 
(h)(6) of this section.
EABV2iBASE=Emissions from each Group 2 aggregate batch vent stream 
i at the baseline date. EABV2iBASE is calculated according to 
paragraph (h)(7) of this section.
EABV2iACTUAL=Emissions from each Group 2 aggregate batch vent 
stream i that is controlled. EABV2iACTUAL is calculated according 
to paragraph (h)(7) of this section.
n=Number of Group 1 emission points included in the emissions average. 
The value of n is not necessarily the same for continuous process 
vents, batch process vents, aggregate batch vent streams, storage 
vessels, wastewater streams, or the collection of process sections 
within the affected source.
m=Number of Group 2 emission points included in the emissions average. 
The value of m is not necessarily the same for continuous process 
vents, batch process vents, aggregate batch vent streams, storage 
vessels, wastewater streams, or the collection of process sections 
within the affected source.

    (i) Except as specified in paragraph (h)(1)(iv) of this section, 
for an emission point controlled using a reference control technology, 
the percent reduction for calculating credits shall be no greater than 
the nominal efficiency associated with the reference control 
technology, unless a higher nominal efficiency is assigned as specified 
in paragraph (h)(1)(ii) of this section.
    (ii) For an emission point controlled to a level more stringent 
than the reference control technology, the nominal efficiency for 
calculating credits shall be assigned as described in paragraph (i) of 
this section. A reference control technology may be approved for use in 
a different manner and assigned a higher nominal efficiency according 
to the procedures in paragraph (i) of this section.
    (iii) For an emission point controlled using a pollution prevention 
measure, the nominal efficiency for calculating credits shall be as 
determined as described in paragraph (j) of this section.
    (iv) For Group 1 and Group 2 batch process vents and Group 1 and 
Group 2 aggregate batch vent streams, the percent reduction for 
calculating credits shall be the percent reduction determined according 
to the procedures in paragraphs (h)(6)(ii) and (h)(6)(iii) of this 
section for batch process vents and paragraphs (h)(7)(ii) and 
(h)(7)(iii) of this section for aggregate batch vent streams.

[[Page 48267]]

    (2) Emissions from continuous process vents subject to Sec. 63.1315 
shall be determined as follows:
    (i) Uncontrolled emissions from Group 1 continuous process vents 
(ECPV1iu) shall be calculated according to the procedures and 
equation for ECPViu in paragraphs (g)(2)(i) and (g)(2)(ii) of this 
section.
    (ii) Actual emissions from Group 1 continuous process vents 
controlled using a technology with an approved nominal efficiency 
greater than 98 percent or a pollution prevention measure achieving 
greater than 98 percent emission reduction (ECPV1iACTUAL) shall be 
calculated using Equation 36 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.035

    (iii) The following procedures shall be used to calculate actual 
emissions from Group 2 continuous process vents (ECPV2iACTUAL):
    (A) For a Group 2 continuous process vent controlled by a control 
device, a recovery device applied as a pollution prevention project, or 
a pollution prevention measure, where the control achieves a percent 
reduction less than or equal to 98 percent reduction, use Equation 37 
of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.036

    (1) ECPV2iu shall be calculated according to the equations and 
procedures for ECPViu in paragraphs (g)(2)(i) and (g)(2)(ii) of 
this section, except as provided in paragraph (h)(2)(iii)(A)(3) of this 
section.
    (2) The percent reduction shall be calculated according to the 
procedures in paragraphs (g)(2)(iii)(B)(1) through (g)(2)(iii)(B)(3) of 
this section, except as provided in paragraph (h)(2)(iii)(A)(4) of this 
section.
    (3) If a recovery device was added as part of a pollution 
prevention project, ECPV2iu shall be calculated prior to that 
recovery device. The equation for ECPViu in paragraph (g)(2)(ii) 
of this section shall be used to calculate ECPV2iu; however, the 
sampling site for measurement of vent stream flow rate and organic HAP 
concentration shall be at the inlet of the recovery device.
    (4) If a recovery device was added as part of a pollution 
prevention project, the percent reduction shall be demonstrated by 
conducting a performance test at the inlet and outlet of that recovery 
device.
    (B) For a Group 2 continuous process vent controlled using a 
technology with an approved nominal efficiency greater than 98 percent 
or a pollution prevention measure achieving greater than 98 percent 
reduction, use Equation 38 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.037

    (iv) Emissions from Group 2 continuous process vents at baseline 
shall be calculated as follows:
    (A) If the continuous process vent was uncontrolled on November 15, 
1990, ECPV2iBASE=ECPV2iu and shall be calculated according to 
the procedures and equation for ECPViu in paragraphs (g)(2)(i) and 
(g)(2)(ii) of this section.
    (B) If the continuous process vent was controlled on November 15, 
1990, use Equation 39 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.038

    (1) ECPV2iu is calculated according to the procedures and 
equation for ECPViu in paragraphs (g)(2)(i) and (g)(2)(ii) of this 
section.
    (2) The percent reduction shall be calculated according to the 
procedures specified in paragraphs (g)(2)(iii)(B)(1) through 
(g)(2)(iii)(B)(3) of this section.
    (C) If a recovery device was added as part of a pollution 
prevention project initiated after November 15, 1990, 
ECPV2iBASE=ECPV2iu, where ECPV2iu is calculated 
according to paragraph (h)(2)(iii)(A)(3) of this section.
    (3) Emissions from continuous process vents subject to 
Sec. 63.1316(b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) 
shall be determined as follows:
    (i) Emissions from Group 1 continuous process vents located in the 
collection of process sections j within the affected source if the 
applicable standard had been applied to the uncontrolled emissions 
(ECPVS1jstd) shall be calculated according to paragraph (g)(3)(ii) 
of this section.
    (ii) Actual emissions from Group 1 continuous process vents located 
in the collection of process sections j within the affected source 
controlled to a level more stringent than the applicable standard 
(ECPVS1jACTUAL) shall be calculated using the procedures in 
paragraphs (g)(3)(ii)(A) and (g)(3)(ii)(B) of this section, except that 
the actual emission level, Mg organic HAP/Mg of product, shall be used 
as EFstd in Equation 31 of this subpart. Further, 
ECPVS1jACTUAL for continuous process vents subject to 
Sec. 63.1316(c)(1) controlled in accordance with 
Sec. 63.1316(c)(1)(iii) shall be calculated using the procedures in 
paragraph

[[Page 48268]]

(h)(2)(ii) of this section for individual continuous process vents and 
then summing said emissions to get ECPVS1jACTUAL, except that the 
sampling site shall be after recovery devices installed as part of 
normal operation; before any add-on control devices (i.e., those 
required by regulation); and prior to discharge to the atmosphere.
    (iii) Actual emissions from Group 2 continuous process vents 
subject to Sec. 63.1316(b)(1)(i) located in the collection of material 
recovery sections j within the affected source (ECPVS2jACTUAL) 
shall be calculated using the procedures in paragraphs (g)(3)(ii)(A) 
and (g)(3)(ii)(B) of this section, except that the actual emission 
level, Mg organic HAP/Mg of product, shall be used as EFstd in 
Equation 31 of this subpart.
    (iv) Emissions from Group 2 continuous process vents subject to 
Sec. 63.1316(b)(1)(i) located in the collection of material recovery 
sections j within the affected source at baseline (ECPVS2jBASE) 
shall be calculated using the procedures in paragraphs (g)(3)(ii)(A) 
and (g)(3)(ii)(B) of this section, except that the actual emission 
level, Mg organic HAP/Mg of product, at baseline shall be used as 
EFstd in Equation 31 of this subpart.
    (4)(i) Emissions from storage vessels shall be calculated using the 
procedures specified in Sec. 63.150(h)(3).
    (ii) Actual emissions from Group 1 storage vessels at an existing 
affected source producing ASA/AMSAN subject to Sec. 63.1314(c) using a 
technology with an approved nominal efficiency greater than 98 percent 
or a pollution prevention measure achieving greater than 98 percent 
emission reduction shall be calculated using the procedures specified 
in Sec. 63.150(h)(3)(ii).
    (5) Emissions from wastewater streams shall be calculated using the 
procedures specified in Sec. 63.150(h)(5).
    (6) Emissions from batch process vents shall be determined as 
follows:
    (i) Uncontrolled emissions from Group 1 batch process vents 
(EBPV1iu) shall be calculated using the procedures 
Sec. 63.1323(b).
    (ii) Actual emissions from Group 1 batch process vents controlled 
to a level more stringent than the reference control technology 
(EBPV1iACTUAL) shall be calculated using Equation 40 of this 
subpart, where percent reduction is for the batch cycle.
[GRAPHIC] [TIFF OMITTED] TR12SE96.039

    (A) The percent reduction for the batch cycle shall be calculated 
according to the procedures in Sec. 63.1325(c)(2).
    (B) The percent reduction for control devices shall be determined 
according to the procedures in Sec. 63.1325(c)(2)(i) through 
(c)(2)(iii).
    (C) The percent reduction of pollution prevention measures shall be 
calculated using the procedures specified in paragraph (j) of this 
section.
    (iii) Actual emissions from Group 2 batch process vents 
(EBPV2iACTUAL) shall be calculated using Equation 41 of this 
subpart and the procedures in paragraphs (h)(6)(ii)(A) through 
(h)(6)(ii)(C) of this section. EBPV2iu shall be calculated using 
the procedures specified in Sec. 63.1323(b).
[GRAPHIC] [TIFF OMITTED] TR12SE96.040

    (iv) Emissions from Group 2 batch process vents at baseline 
(EBPV2iBASE) shall be calculated as follows:
    (A) If the batch process vent was uncontrolled on November 15, 
1990, EBPV2iBASE=EBPV2iu and shall be calculated using the 
procedures specified in Sec. 63.1323(b).
    (B) If the batch process vent was controlled on November 15, 1990, 
use Equation 42 of this subpart and the procedures in paragraphs 
(h)(6)(ii)(A) through (h)(6)(ii)(C) of this section. EBPV2iu shall 
be calculated using the procedures specified in Sec. 63.1323(b).
[GRAPHIC] [TIFF OMITTED] TR12SE96.041

    (7) Emissions from aggregate batch vent streams shall be determined 
as follows:
    (i) Uncontrolled emissions from Group 1 aggregate batch vent 
streams (EABV1iu) shall be calculated according to the procedures 
and equation for EABViu in paragraphs (g)(7)(i) and (g)(7)(ii) of 
this section.
    (ii) Actual emissions from Group 1 aggregate batch vent streams 
controlled to a level more stringent than the reference control 
technology (EABV1iACTUAL) shall be calculated using Equation 43 of 
this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.042


[[Page 48269]]


    (A) The percent reduction for control devices shall be determined 
according to the procedures in Sec. 63.1325(e).
    (B) The percent reduction of pollution prevention measures shall be 
calculated using the procedures specified in paragraph (j) of this 
section.
    (iii) Actual emissions from Group 2 aggregate batch vent streams 
(EABV2iACTUAL) shall be calculated using Equation 44 of this 
subpart and the procedures in paragraphs (h)(7)(ii)(A) through 
(h)(7)(ii)(B) of this section. EABV2iu shall be calculated 
according to the equations and procedures for EABViu in paragraphs 
(g)(7)(i) and (g)(7)(ii) of this section.
[GRAPHIC] [TIFF OMITTED] TR12SE96.043

    (iv) Emissions from Group 2 aggregate batch vent streams at 
baseline shall be calculated as follows:
    (A) If the aggregate batch vent stream was uncontrolled on November 
15, 1990, EABV2iBASE=EABV2iu and shall be calculated 
according to the procedures and equation for EABViu in paragraphs 
(g)(7)(i) and (g)(7)(ii) of this section.
    (B) If the aggregate batch vent stream was controlled on November 
15, 1990, use Equation 45 of this subpart and the procedures in 
paragraphs (h)(7)(ii)(A) through (h)(7)(ii)(B) of this section. 
EABV2iu shall be calculated according to the equations and 
procedures for EABViu in paragraphs (g)(7)(i) and (g)(7)(ii) of 
this section.
[GRAPHIC] [TIFF OMITTED] TR12SE96.044

    (i) The following procedures shall be followed to establish nominal 
efficiencies for emission controls for storage vessels, continuous 
process vents, and process wastewater streams. The procedures in 
paragraphs (i)(1) through (i)(6) of this section shall be followed for 
control technologies that are different in use or design from the 
reference control technologies and achieve greater percent reductions 
than the percent efficiencies assigned to the reference control 
technologies in Sec. 63.111.
    (1) In those cases where the owner or operator is seeking 
permission to take credit for use of a control technology that is 
different in use or design from the reference control technology, and 
the different control technology will be used in more than three 
applications at a single plant-site, the owner or operator shall submit 
the information specified in paragraphs (i)(1)(i) through (i)(1)(iv) of 
this section to the Director of the EPA Office of Air Quality Planning 
and Standards in writing:
    (i) Emission stream characteristics of each emission point to which 
the control technology is or will be applied including the kind of 
emission point, flow, organic HAP concentration, and all other stream 
characteristics necessary to design the control technology or determine 
its performance.
    (ii) Description of the control technology including design 
specifications.
    (iii) Documentation demonstrating to the Administrator's 
satisfaction the control efficiency of the control technology. This may 
include performance test data collected using an appropriate EPA Method 
or any other method validated according to Method 301 of appendix A of 
this part. If it is infeasible to obtain test data, documentation may 
include a design evaluation and calculations. The engineering basis of 
the calculation procedures and all inputs and assumptions made in the 
calculations shall be documented.
    (iv) A description of the parameter or parameters to be monitored 
to ensure that the control technology will be operated in conformance 
with its design and an explanation of the criteria used for selection 
of that parameter (or parameters).
    (2) The Administrator shall determine within 120 operating days 
whether an application presents sufficient information to determine 
nominal efficiency. The Administrator reserves the right to request 
specific data in addition to the items listed in paragraph (i)(1) of 
this section.
    (3) The Administrator shall determine within 120 operating days of 
the submittal of sufficient data whether a control technology shall 
have a nominal efficiency and the level of that nominal efficiency. If, 
in the Administrator's judgment, the control technology achieves a 
level of emission reduction greater than the reference control 
technology for a particular kind of emission point, the Administrator 
will publish a Federal Register notice establishing a nominal 
efficiency for the control technology.
    (4) The Administrator may grant permission to take emission credits 
for use of the control technology. The Administrator may also impose 
requirements that may be necessary to ensure operation and maintenance 
to achieve the specified nominal efficiency.
    (5) In those cases where the owner or operator is seeking 
permission to take credit for use of a control technology that is 
different in use or design from the reference control technology and 
the different control technology will be used in no more than three 
applications at a single plant site, the information listed in 
paragraphs (i)(1)(i) through (i)(1)(iv) of this section can be 
submitted to the permitting authority for the affected source for 
approval instead of the Administrator.
    (i) In these instances, use and conditions for use of the control 
technology can be approved by the permitting authority as part of an 
operating permit application or modification. The permitting authority 
shall follow the procedures specified in paragraphs (i)(2) through 
(i)(4) of this section except that, in these instances, a Federal 
Register notice is not required to establish the nominal efficiency for 
the different technology.
    (ii) If, in reviewing the application, the permitting authority 
believes the control technology has broad applicability for use by 
other affected sources, the permitting authority shall submit the 
information provided in the application to the Director of the EPA 
Office of Air Quality Planning and Standards. The Administrator shall

[[Page 48270]]

review the technology for broad applicability and may publish a Federal 
Register notice; however, this review shall not affect the permitting 
authority's approval of the nominal efficiency of the control 
technology for the specific application.
    (6) If, in reviewing an application for a control technology for an 
emission point, the Administrator or permitting authority determines 
the control technology is not different in use or design from the 
reference control technology, the Administrator or permitting authority 
shall deny the application.
    (j) The following procedures shall be used for calculating the 
efficiency (percent reduction) of pollution prevention measures for 
storage vessels, continuous process vents, batch process vents, 
aggregate batch vent streams, and wastewater streams:
    (1) A pollution prevention measure is any practice that meets the 
criteria of paragraphs (j)(1)(i) and (j)(1)(ii) of this section.
    (i) A pollution prevention measure is any practice that results in 
a lesser quantity of organic HAP emissions per unit of product released 
to the atmosphere prior to out-of-process recycling, treatment, or 
control of emissions, while the same product is produced.
    (ii) Pollution prevention measures may include: substitution of 
feedstocks that reduce organic HAP emissions; alterations to the 
production process to reduce the volume of materials released to the 
environment; equipment modifications; housekeeping measures; and in-
process recycling that returns waste materials directly to production 
as raw materials. Production cutbacks do not qualify as pollution 
prevention.
    (2) The emission reduction efficiency of pollution prevention 
measures implemented after November 15, 1990, can be used in 
calculating the actual emissions from an emission point in the debit 
and credit equations in paragraphs (g) and (h) of this section.
    (i) For pollution prevention measures, the percent reduction used 
in the equations in paragraphs (g)(2) through (g)(7) of this section 
and paragraphs (h)(2) through (h)(7) of this section is the percent 
difference between the monthly organic HAP emissions for each emission 
point after the pollution prevention measure for the most recent month 
versus monthly emissions from the same emission point before the 
pollution prevention measure, adjusted by the volume of product 
produced during the two monthly periods.
    (ii) Equation 46 of this subpart shall be used to calculate the 
percent reduction of a pollution prevention measure for each emission 
point.
[GRAPHIC] [TIFF OMITTED] TR12SE96.045

where:

Percent reduction=Efficiency of pollution prevention measure (percent 
organic HAP reduction).
EB=Monthly emissions before the pollution prevention measure, 
megagrams per month, determined as specified in paragraphs 
(j)(2)(ii)(A), (j)(2)(ii)(B), and (j)(2)(ii)(C) of this section.
Epp=Monthly emissions after the pollution prevention measure, 
megagrams per month, as determined for the most recent month, 
determined as specified in either paragraphs (j)(2)(ii)(D) or 
(j)(2)(ii)(E) of this section.
PB=Monthly production before the pollution prevention measure, 
megagrams per month, during the same period over which EB is 
calculated.
Ppp=Monthly production after the pollution prevention measure, 
megagrams per month, as determined for the most recent month.

    (A) The monthly emissions before the pollution prevention measure, 
EB, shall be determined in a manner consistent with the equations 
and procedures in paragraphs (g)(2) and (g)(3) of this section for 
continuous process vents, paragraph (g)(4) of this section for storage 
vessels, paragraph (g)(6) of this section for batch process vents, and 
paragraph (g)(7) of this section for aggregate batch vent streams.
    (B) For wastewater, EB shall be calculated using Equation 47 
of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.046

where:

n=Number of wastewater streams.
 QBi=Average flow rate for wastewater stream i before the 
pollution prevention measure, defined and determined according to 
Sec. 63.144(c)(3), liters per minute, before implementation of the 
pollution prevention measure.
HBi=Number of hours per month that wastewater stream i was 
discharged before the pollution prevention measure, hours per month.
s=Total number of organic HAP in wastewater stream i.
Fem=Fraction emitted of organic HAP m in wastewater from Table 9 
of subpart G of this part, dimensionless.
HAPBim=Average concentration of organic HAP m in wastewater stream 
i, defined and determined according to paragraph (g)(5)(i) of this 
section, before the pollution prevention measure, parts per million by 
weight, as measured before the implementation of the pollution measure.

    (C) If the pollution prevention measure was implemented prior to 
September 12, 1996 records may be used to determine EB.
    (D) The monthly emissions after the pollution prevention measure, 
Epp, may be determined during a performance test or by a design 
evaluation and documented engineering calculations. Once an emissions-
to-production ratio has been established, the ratio can be

[[Page 48271]]

used to estimate monthly emissions from monthly production records.
    (E) For wastewater, Epp shall be calculated using Equation 48 
of this subpart and n, Qppi, Hppi, s, Fem, and 
HAPppim are defined and determined as described in paragraph 
(j)(2)(ii)(B) of this section, except that Qppi, Hppi, and 
HAPppim shall be determined after the pollution prevention measure 
has been implemented.
[GRAPHIC] [TIFF OMITTED] TR12SE96.047

    (iii) All equations, calculations, test procedures, test results, 
and other information used to determine the percent reduction achieved 
by a pollution prevention measure for each emission point shall be 
fully documented.
    (iv) The same pollution prevention measure may reduce emissions 
from multiple emission points. In such cases, the percent reduction in 
emissions for each emission point must be calculated.
    (v) For the purposes of the equations in paragraphs (h)(2) through 
(h)(7) of this section used to calculate credits for emission points 
controlled more stringently than the reference control technology, the 
nominal efficiency of a pollution prevention measure is equivalent to 
the percent reduction of the pollution prevention measure. When a 
pollution prevention measure is used, the owner or operator of an 
affected source is not required to apply to the Administrator for a 
nominal efficiency and is not subject to paragraph (i) of this section.
    (k) The owner or operator must demonstrate that the emissions from 
the emission points proposed to be included in the emissions average 
will not result in greater hazard or, at the option of the 
Administrator, greater risk to human health or the environment than if 
the emission points were controlled according to the provisions in 
Secs. 63.1314, 63.1315, 63.1316 through 63.1320, 63.1321, and 63.1330.
    (1) This demonstration of hazard or risk equivalency shall be made 
to the satisfaction of the Administrator.
    (i) The Administrator may require owners and operators to use 
specific methodologies and procedures for making a hazard or risk 
determination.
    (ii) The demonstration and approval of hazard or risk equivalency 
shall be made according to any guidance that the Administrator makes 
available for use.
    (2) Owners and operators shall provide documentation demonstrating 
the hazard or risk equivalency of their proposed emissions average in 
their operating permit application or in their Emissions Averaging Plan 
if an operating permit application has not yet been submitted.
    (3) An Emissions Averaging Plan that does not demonstrate hazard or 
risk equivalency to the satisfaction of the Administrator shall not be 
approved. The Administrator may require such adjustments to the 
Emissions Averaging Plan as are necessary in order to ensure that the 
emissions average will not result in greater hazard or risk to human 
health or the environment than would result if the emission points were 
controlled according to Secs. 63.1314, 63.1315, 63.1316 through 
63.1320, 63.1321, and 63.1330.
    (4) A hazard or risk equivalency demonstration must:
    (i) Be a quantitative, bona fide chemical hazard or risk 
assessment;
    (ii) Account for differences in chemical hazard or risk to human 
health or the environment; and
    (iii) Meet any requirements set by the Administrator for such 
demonstrations.
    (l) For periods of parameter monitoring excursions, an owner or 
operator may request that the provisions of paragraphs (l)(1) through 
(l)(4) of this section be followed instead of the procedures in 
paragraphs (f)(3)(i) and (f)(3)(ii) of this section.
    (1) The owner or operator shall notify the Administrator of 
monitoring excursions in the Periodic Reports as required in 
Sec. 63.1335(e)(6).
    (2) The owner or operator shall demonstrate that other types of 
monitoring data or engineering calculations are appropriate to 
establish that the control device for the emission point was operating 
in such a fashion to warrant assigning full or partial credits and 
debits. This demonstration shall be made to the Administrator's 
satisfaction, and the Administrator may establish procedures of 
demonstrating compliance that are acceptable.
    (3) The owner or operator shall provide documentation of the 
excursion and the other type of monitoring data or engineering 
calculations to be used to demonstrate that the control device for the 
emission point was operating in such a fashion to warrant assigning 
full or partial credits and debits.
    (4) The Administrator may assign full or partial credit and debits 
upon review of the information provided.
    (m) For each emission point included in an emissions average, the 
owner or operator shall perform testing, monitoring, recordkeeping, and 
reporting equivalent to that required for Group 1 emission points 
complying with Secs. 63.1314, 63.1315, 63.1316 through 63.1320, 
63.1321, and 63.1330, as applicable. The specific requirements for 
continuous process vents, batch process vents, aggregate batch vent 
streams, storage vessels, and wastewater operations that are included 
in an emissions average for an affected source are identified in 
paragraphs (m)(1) through (m)(7) of this section.
    (1) For each continuous process vent subject to Sec. 63.1315 
equipped with a flare, incinerator, boiler, or process heater, as 
appropriate to the control technique:
    (i) Determine whether the continuous process vent is Group 1 or 
Group 2 according to the procedures specified in Sec. 63.1315;
    (ii) Conduct initial performance tests to determine percent 
reduction according to the procedures specified in Sec. 63.1315; and
    (iii) Monitor the operating parameters, keep records, and submit 
reports according to the procedures specified in Sec. 63.1315.
    (2) For each continuous process vent subject to Sec. 63.1315 
equipped with a carbon adsorber, absorber, or condenser but not 
equipped with a control device, as appropriate to the control 
technique:
    (i) Determine the flow rate, organic HAP concentration, and TRE 
index value according to the procedures specified in Sec. 63.1315; and
    (ii) Monitor the operating parameters, keep records, and submit 
reports according to the procedures specified in Sec. 63.1315.
    (3) For continuous process vents subject to Sec. 63.1316(b)(1)(i), 
(b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1):
    (i) Determine whether the emissions from the continuous process 
vents subject to Sec. 63.1316(b)(1)(i) located in the collection of 
material recovery sections within the affected source are greater than, 
equal to, or less than 0.12 kg organic HAP per Mg of product according 
to the procedures specified in Sec. 63.1318(b);

[[Page 48272]]

    (ii) Determine the emission rate, ERHAP, for each collection 
of process sections within the affected source according to the 
procedures specified in Sec. 63.1318(b); and
    (iv) Monitor the operating parameters, keep records, and submit 
reports according to the procedures specified in Sec. 63.1317, 
Sec. 63.1319, Sec. 63.1320.
    (4) For each storage vessel controlled with an internal floating 
roof, external roof, or a closed vent system with a control device, as 
appropriate to the control technique:
    (i) Perform the monitoring or inspection procedures according to 
the procedures specified in Sec. 63.1314;
    (ii) Perform the reporting and recordkeeping procedures according 
to the procedures specified in Sec. 63.1314; and
    (iii) For closed vent systems with control devices, conduct an 
initial design evaluation and submit an operating plan according to the 
procedures specified in Sec. 63.1314.
    (5) For wastewater emission points, as appropriate to the control 
technique:
    (i) For wastewater treatment processes, conduct tests according to 
the procedures specified in Sec. 63.1330;
    (ii) Conduct inspections and monitoring according to the procedures 
specified in Sec. 63.1330;
    (iii) Implement a recordkeeping program according to the procedures 
specified in Sec. 63.1330; and
    (iv) Implement a reporting program according to the procedures 
specified in Sec. 63.1330.
    (6) For each batch process vent and aggregate batch vent stream 
equipped with a control device, as appropriate to the control 
technique:
    (i) Determine whether the batch process vent or aggregate batch 
vent stream is Group 1 or Group 2 according to the procedures in 
Sec. 63.1323;
    (ii) Conduct performance tests according to the procedures 
specified in Sec. 63.1325;
    (iii) Conduct monitoring according to the procedures specified in 
Sec. 63.1324; and
    (iv) Perform the recordkeeping and reporting procedures according 
to the procedures specified in Secs. 63.1326 and 63.1327.
    (7) If an emission point in an emissions average is controlled 
using a pollution prevention measure or a device or technique for which 
no monitoring parameters or inspection procedures are required by 
Secs. 63.1314, 63.1315, 63.1316 through 63.1320, 63.1321, or 63.1330, 
the owner or operator shall submit the information specified in 
Sec. 63.1335(f) for alternate monitoring parameters or inspection 
procedures in the Emissions Averaging Plan or operating permit 
application.
    (n) Records of all information required to calculate emission 
debits and credits shall be retained for 5 years.
    (o) Precompliance Reports, Emission Averaging Plans, Notifications 
of Compliance Status, Periodic Reports, and other reports shall be 
submitted as required by Sec. 63.1335.


Sec. 63.1333   Additional test methods and procedures.

    (a) Performance testing shall be conducted in accordance with 
Sec. 63.7(a)(3), (d), (e), (g), and (h), with the exceptions specified 
in paragraphs (a)(1) through (a)(4) of this section and the additions 
specified in paragraphs (b) through (d) of this section. Sections 
63.1314 through 63.1330 also contain specific testing requirements.
    (1) Performance tests shall be conducted according to the 
provisions of Sec. 63.7(e), except that performance tests shall be 
conducted at maximum representative operating conditions for the 
process.
    (2) References in Sec. 63.7(g) to the Notification of Compliance 
Status requirements in Sec. 63.7(h) shall refer to the requirements in 
Sec. 63.1335(e)(5).
    (3) Because the site-specific test plans in Sec. 63.7(c)(3) are not 
required, Sec. 63.7(h)(4)(ii) is not applicable.
    (4) The owner or operator shall notify the Administrator of the 
intention to conduct a performance test at least 30 calendar days 
before the performance test is scheduled to allow the Administrator the 
opportunity to have an observer present during the test.
    (b) Each owner or operator of an existing affected source producing 
MBS complying with Sec. 63.1315(b)(2) shall determine compliance with 
the mass emission per mass product standard by using Equation 49 of 
this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.048

where:
ERMBS=Emission rate of organic HAP or TOC from continuous process 
vents, kg/Mg product.
Ei=Emission rate of organic HAP or TOC from continuous process 
vent i as calculated using the procedures specified in 
Sec. 63.116(c)(4), kg/month.
PPM=Amount of polymer produced in one month as determined by the 
procedures specified in Sec. 63.1318(b)(1)(ii), Mg/month.
n=Number of continuous process vents.

When determining Ei, when the provisions of Sec. 63.116(c)(4) 
specify that Method 18, 40 CFR part 60, appendix A, shall be used, 
Method 18 or Method 25A, 40 CFR part 60, appendix A, may be used for 
the purposes of this subpart. The use of Method 25A, 40 CFR part 60, 
appendix A, shall comply with paragraphs (b)(1) and (b)(2) of this 
section.
    (1) The organic HAP used as the calibration gas for Method 25A, 40 
CFR part 60, appendix A, shall be the single organic HAP representing 
the largest percent by volume.
    (2) The use of Method 25A, 40 CFR part 60, appendix A, is 
acceptable if the response from the high-level calibration gas is at 
least 20 times the standard deviation of the response from the zero 
calibration gas when the instrument is zeroed on the most sensitive 
scale.
    (c) The owner or operator of an affected source, complying with 
Sec. 63.1322(a)(3) shall determine compliance with the percent 
reduction requirement using Equation 50 of this subpart.
[GRAPHIC] [TIFF OMITTED] TR12SE96.049

where:

PR=Percent reduction
Hj=Number of operating hours in a year for control device j.
Ei=Mass rate of TOC or total organic HAP at the inlet of control 
device

[[Page 48273]]

j, calculated as specified in Sec. 63.1325(f), kg/hr. This value 
includes all continuous process vents, batch process vents, and 
aggregate batch vent streams routed to control device j.
Eo=Mass rate of TOC or total organic HAP at the outlet of control 
device j, calculated as specified in Sec. 63.1325(f), kg/hr.
Hk=Number of hours of operation during which positive flow is 
present in uncontrolled continuous process vent or aggregate batch vent 
stream k, hr/yr.
Eku=Mass rate of TOC or total organic HAP of uncontrolled 
continuous process vent or aggregate batch vent stream k, calculated as 
specified in Sec. 63.1325(f)(4), kg/hr.
AEunc=Mass rate of TOC or total organic HAP of uncontrolled batch 
process vent l, calculated as specified in Sec. 63.1325(f)(4), kg/yr.
n=Number of control devices, uncontrolled continuous process vents and 
aggregate batch vent streams, and uncontrolled batch process vents. The 
value of n is not necessarily the same for these three items.

    (d) Data shall be reduced in accordance with the EPA approved 
methods specified in the applicable subpart or, if other test methods 
are used, the data and methods shall be validated according to the 
protocol in Method 301 of appendix A of this part.


Sec. 63.1334  Parameter monitoring levels and excursions.

    (a) Establishment of parameter monitoring levels. The owner or 
operator of a control or recovery device that has one or more parameter 
monitoring level requirements specified under this subpart shall 
establish a maximum or minimum level for each measured parameter using 
the procedures specified in paragraph (b), (c), or (d) of this section. 
The procedures specified in paragraph (b) of this section have been 
approved by the Administrator. The procedures in paragraphs (c) and (d) 
of this section have not been approved by the Administrator and 
determination of the parameter monitoring level using the procedures in 
paragraph (c) or (d) of this section is subject to review and approval 
by the Administrator. Said determination and supporting documentation 
shall be included in the Precompliance Report, specified in 
Sec. 63.1335(e)(3).
    (1) The owner or operator shall operate control and recovery 
devices such that monitored parameters remain above the minimum 
established level or below the maximum established level.
    (2) As specified in Sec. 63.1335(e)(5) and Sec. 63.1335(e)(8), all 
established levels, along with their supporting documentation and the 
definition of an operating day, shall be approved as part of and 
incorporated into the Notification of Compliance Status or operating 
permit, respectively.
    (3) Nothing in this section shall be construed to allow a 
monitoring parameter excursion caused by an activity that violates 
other applicable provisions of subpart A, F, or G of this part.
    (b) Establishment of parameter monitoring levels based on 
performance tests. The procedures specified in paragraphs (b)(1) 
through (b)(3) of this section shall be used, as applicable, in 
establishing parameter monitoring levels. Level(s) established under 
this paragraph (b) shall be based on the parameter values measured 
during the performance test.
    (1) Storage tanks and wastewater. The maximum and/or minimum 
monitoring levels shall be based on the parameter values measured 
during the performance test, supplemented, if desired, by engineering 
assessments and/or manufacturer's recommendations.
    (2) Continuous process vents. During initial compliance testing, 
the appropriate parameter shall be continuously monitored during the 
required 1-hour runs. The monitoring level(s) shall then be established 
as the average of the maximum (or minimum) point values from the three 
test runs. The average of the maximum values shall be used when 
establishing a maximum level, and the average of the minimum values 
shall be used when establishing a minimum level.
    (3) Batch process vents. The monitoring level(s) shall be 
established using the procedures specified in paragraphs (b)(3)(i) 
through (b)(3)(ii) of this section, as appropriate. The procedures 
specified in this paragraph (b)(3) may only be used if the batch 
emission episodes, or portions thereof, selected to be controlled were 
tested, and monitoring data were collected, during the entire period in 
which emissions were vented to the control device, as specified in 
Sec. 63.1325(c)(1)(i). If the owner or operator chose to test only a 
portion of the batch emission episode, or portion thereof, selected to 
be controlled, as specified in Sec. 63.1325(c)(1)(i)(A), the procedures 
in paragraph (c) of this section must be used.
    (i) If more than one batch emission episode or more than one 
portion of a batch emission episode has been selected to be controlled, 
a single level for the batch cycle shall be calculated as follows:
    (A) During initial compliance testing, the appropriate parameter 
shall be monitored continuously at all times when batch emission 
episodes, or portions thereof, selected to be controlled are vented to 
the control device.
    (B) The average monitored parameter value shall be calculated for 
each batch emission episode, or portion thereof, in the batch cycle 
selected to be controlled. The average shall be based on all values 
measured during the required performance test.
    (C) If the level to be established is a maximum operating 
parameter, the level shall be defined as the minimum of the average 
parameter values of the batch emission episodes, or portions thereof, 
in the batch cycle selected to be controlled.
    (D) If the level to be established is a minimum operating 
parameter, the level shall be defined as the maximum of the average 
parameter values of the batch emission episodes, or portions thereof, 
in the batch cycle selected to be controlled.
    (E) Alternatively, an average monitored parameter value shall be 
calculated for the entire batch cycle based on all values measured 
during each batch emission episode, or portion thereof, selected to be 
controlled.
    (ii) Instead of establishing a single level for the batch cycle, as 
described in paragraph (b)(3)(i) of this section, an owner or operator 
may establish separate levels for each batch emission episode, or 
portion thereof, selected to be controlled. Each level shall be 
determined as specified in paragraphs (b)(3)(i)(A) and (b)(3)(i)(B) of 
this section.
    (iii) The batch cycle shall be defined in the Notification of 
Compliance Status, as specified in Sec. 63.1335(e)(5). Said definition 
shall include an identification of each batch emission episode and the 
information required to determine parameter monitoring compliance for 
partial batch cycles (i.e., when part of a batch cycle is accomplished 
during two different operating days).
    (4) Aggregate batch vent streams. For aggregate batch vent streams, 
the monitoring level shall be established in accordance with paragraph 
(b)(2) of this section.
    (c) Establishment of parameter monitoring levels based on 
performance tests, engineering assessments, and/or manufacturer's 
recommendations. As required in paragraph (a) of this section,

[[Page 48274]]

the information specified in paragraphs (c)(2) and (c)(3) of this 
section shall be provided in the Precompliance Report.
    (1) Parameter monitoring levels established under this paragraph 
(c) shall be based on the parameter values measured during the 
performance test supplemented by engineering assessments and 
manufacturer's recommendations. Performance testing is not required to 
be conducted over the entire range of expected parameter values.
    (2) The specific level of the monitored parameter(s) for each 
emission point.
    (3) The rationale for the specific level for each parameter for 
each emission point, including any data and calculations used to 
develop the level and a description of why the level indicates proper 
operation of the control or recovery device.
    (d) Establishment of parameter monitoring based on engineering 
assessments and/or manufacturer's recommendations. If a performance 
test is not required by this subpart for a control or recovery device, 
the maximum or minimum level may be based solely on engineering 
assessments and/or manufacturer's recommendations. As required in 
paragraph (a) of this section, the determined level and all supporting 
documentation shall be provided in the Precompliance Report.
    (e) Compliance determinations. The provisions of this paragraph (e) 
apply only to emission points and control or recovery devices for which 
continuous monitoring is required under this subpart.
    (1) The parameter monitoring data for storage vessels, process 
vents, process wastewater streams, and emission points included in 
emissions averages that are required to perform continuous monitoring 
shall be used to determine compliance for the monitored control or 
recovery devices.
    (2) Except as provided in paragraphs (e)(3) and (g) of this 
section, for each excursion, as defined in paragraph (f) of this 
section, the owner or operator shall be deemed out of compliance with 
the provisions of this subpart.
    (3) If the daily average value of a monitored parameter is above 
the maximum level or below the minimum level established, or if 
monitoring data cannot be collected during monitoring device 
calibration check or monitoring device malfunction, but the affected 
source is operated during the periods of start-up, shutdown, or 
malfunction in accordance with the affected source's Start-up, 
Shutdown, and Malfunction Plan, then the event shall not be considered 
a monitoring parameter excursion.
    (f) Parameter monitoring excursion definitions.
    (1) For storage vessels, continuous process vents, aggregate batch 
vent streams, and wastewater streams, an excursion means any of the 
three cases listed in paragraphs (f)(1)(i) through (f)(1)(iii) of this 
section. For a control or recovery device where multiple parameters are 
monitored, if one or more of the parameters meets the excursion 
criteria in paragraphs (f)(1)(i) through (f)(1)(iii) of this section, 
this is considered a single excursion for the control or recovery 
device.
    (i) When the daily average value of one or more monitored 
parameters is above the maximum level or below the minimum level 
established for the given parameters.
    (ii) When the period of control or recovery device operation is 4 
hours or greater in an operating day and monitoring data are 
insufficient, as defined in paragraph (f)(1)(iv) of this section, to 
constitute a valid hour of data for at least 75 percent of the 
operating hours.
    (iii) When the period of control or recovery device operation is 
less than 4 hours in an operating day and more than two of the hours 
during the period of operation do not constitute a valid hour of data 
due to insufficient monitoring data, as defined in paragraph (f)(1)(iv) 
of this section.
    (iv) Monitoring data are insufficient to constitute a valid hour of 
data, as used in paragraphs (f)(1)(ii) and (f)(1)(iii) of this section, 
if measured values are unavailable for any of the 15-minute periods 
within the hour. For data compression systems approved under 
Sec. 63.1335(g)(3), monitoring data are insufficient to calculate a 
valid hour of data if there are less than four data measurements made 
during the hour.
    (2) For batch process vents, an excursion means one of the two 
cases listed in paragraphs (f)(2)(i) and (f)(2)(ii) of this section. 
For a control device where multiple parameters are monitored, if one or 
more of the parameters meets the excursion criteria in either paragraph 
(f)(2)(i) or (f)(2)(ii) of this section, this is considered a single 
excursion for the control device.
    (i) When the batch cycle daily average value of one or more 
monitored parameters is above the maximum or below the minimum 
established level for the given parameters.
    (ii) When monitoring data are insufficient. Monitoring data shall 
be considered insufficient when measured values are not available for 
at least 75 percent of the 15-minute periods when batch emission 
episodes, or portions thereof, selected to be controlled are being 
vented to the control device during the operating day.
    (g) Excused excursions. A number of excused excursions shall be 
allowed for each control or recovery device for each semiannual period. 
The number of excused excursions for each semiannual period is 
specified in paragraphs (g)(1) through (g)(6) of this section. This 
paragraph (g) applies to affected sources required to submit Periodic 
Reports semiannually or quarterly. The first semiannual period is the 
6-month period starting the date the Notification of Compliance Status 
is due.
    (1) For the first semiannual period--six excused excursions.
    (2) For the second semiannual period--five excused excursions.
    (3) For the third semiannual period--four excused excursions.
    (4) For the fourth semiannual period--three excused excursions.
    (5) For the fifth semiannual period--two excused excursions.
    (6) For the sixth and all subsequent semiannual periods--one 
excused excursion.


Sec. 63.1335  General recordkeeping and reporting provisions.

    (a) Data retention. Each owner or operator of an affected source 
shall keep copies of all applicable records and reports required by 
this subpart for at least 5 years, unless otherwise specified in this 
subpart.
    (b) Requirements of subpart A of this part. The owner or operator 
of an affected source shall comply with the applicable recordkeeping 
and reporting requirements in subpart A of this part as specified in 
Table 1 of this subpart. These requirements include, but are not 
limited to, the requirements specified in paragraphs (b)(1) and (b)(2) 
of this section.
    (1) Start-up, shutdown, and malfunction plan. The owner or operator 
of an affected source shall develop and implement a written start-up, 
shutdown, and malfunction plan as specified in Sec. 63.6(e)(3). This 
plan shall describe, in detail, procedures for operating and 
maintaining the affected source during periods of start-up, shutdown, 
and malfunction and a program for corrective action for malfunctioning 
process and air pollution control equipment used to comply with this 
subpart. The affected source shall keep this plan onsite and shall 
incorporate it by reference into their operating permit. Records 
associated with the plan shall be kept as specified in paragraphs 
(b)(1)(i)(A) through (b)(1)(i)(D) of this section.

[[Page 48275]]

Reports related to the plan shall be submitted as specified in 
paragraph (b)(1)(ii) of this section.
    (i) Records of start-up, shutdown, and malfunction. The owner or 
operator shall keep the records specified in paragraphs (b)(1)(i)(A) 
through (b)(1)(i)(D) of this section.
    (A) Records of the occurrence and duration of each malfunction of 
air pollution control equipment or continuous monitoring systems used 
to comply with this subpart.
    (B) For each start-up, shutdown, or malfunction, a statement that 
the procedures specified in the affected source's start-up, shutdown, 
and malfunction plan were followed; alternatively, documentation of any 
actions taken that are not consistent with the plan.
    (C) For continuous monitoring systems used to comply with this 
subpart, records documenting the completion of calibration checks and 
maintenance of continuous monitoring systems that are specified in the 
manufacturer's instructions.
    (D) Records specified in paragraphs (b)(1)(i)(B) and (b)(1)(i)(C) 
of this section are not required if they pertain solely to Group 2 
emission points that are not included in an emissions average or to 
Group 2 continuous process vents subject to Sec. 63.1315(a) with a 
total resource effectiveness value greater than 4.0 or, for Group 2 
continuous process vents subject to Sec. 63.1315(b), with a total 
resource effectiveness value greater than 6.7.
    (ii) Reports of start-up, shutdown, and malfunction. For the 
purposes of this subpart, the semiannual start-up, shutdown, and 
malfunction reports shall be submitted on the same schedule as the 
Periodic Reports required under paragraph (e)(6) of this section 
instead of the schedule specified in Sec. 63.10(d)(5)(i). Said reports 
shall include the information specified in paragraphs (b)(1)(i)(A) 
through (b)(1)(i)(C) of this section and shall contain the name, title, 
and signature of the owner or operator or other responsible official 
who is certifying its accuracy.
    (2) Application for approval of construction or reconstruction. For 
new affected sources, each owner or operator shall comply with the 
provisions in Sec. 63.5 regarding construction and reconstruction, 
excluding the provisions specified in Sec. 63.5 (d)(1)(ii)(H), (d)(2), 
and (d)(3)(ii).
    (c) Requirements of subpart H of this part. Owners or operators of 
affected sources shall comply with the reporting and recordkeeping 
requirements in subpart H of this part, except as specified in 
Sec. 63.1331.
    (d) Recordkeeping and documentation. Owners or operators required 
to keep continuous records shall keep records as specified in 
paragraphs (d)(1) through (d)(8) of this section, unless an alternative 
recordkeeping system has been requested and approved as specified in 
paragraph (g) or (h) of this section. Documentation requirements are 
specified in paragraphs (d)(9) and (d)(10) of this section.
    (1) The monitoring system shall measure data values at least once 
every 15 minutes.
    (2) The owner or operator shall record either each measured data 
value or block average values for 1 hour or shorter periods calculated 
from all measured data values during each period. If values are 
measured more frequently than once per minute, a single value for each 
minute may be used to calculate the hourly (or shorter period) block 
average instead of all measured values. Owners or operators of batch 
process vents must record each measured data value.
    (3) Daily average (or batch cycle daily average) values of each 
continuously monitored parameter shall be calculated for each operating 
day as specified in paragraphs (d)(3)(i) through (d)(3)(ii) of this 
section, except as specified in paragraph (d)(6) of this section.
    (i) The daily average value or batch cycle daily average shall be 
calculated as the average of all parameter values recorded during the 
operating day. As specified in Sec. 63.1326(e)(2)(i), only parameter 
values measured during those batch emission episodes, or portions 
thereof, in the batch cycle that the owner or operator has chosen to 
control shall be used to calculate the average. The calculated average 
shall cover a 24-hour period if operation is continuous, or the number 
of hours of operation per operating day if operation is not continuous.
    (ii) The operating day shall be the period the owner or operator 
specifies in the operating permit or the Notification of Compliance 
Status. It may be from midnight to midnight or another 24-hour period.
    (4) Records required when out of compliance. If the daily average 
(or batch cycle daily average) value of a monitored parameter for a 
given operating day is below the minimum level or above the maximum 
level established in the Notification of Compliance Status or operating 
permit, the owner or operator shall retain the data recorded that 
operating day under paragraph (d)(2) of this section.
    (5) Records required when in compliance for daily average value or 
batch cycle daily average value. If the daily average (or batch cycle 
daily average) value of a monitored parameter for a given operating day 
is above the minimum level or below the maximum level established in 
the Notification of Compliance Status or operating permit, the owner or 
operator shall either:
    (i) Retain block average values for 1 hour or shorter periods for 
that operating day; or
    (ii) Retain the data recorded in paragraph (d)(2) of this section.
    (6) Records required when all recorded values are in compliance. If 
all recorded values for a monitored parameter during an operating day 
are above the minimum level or below the maximum level established in 
the Notification of Compliance Status or operating permit, the owner or 
operator may record that all values were above the minimum level or 
below the maximum level rather than calculating and recording a daily 
average (or batch cycle daily average) for that operating day. For 
these operating days, the records required in paragraph (d)(5) of this 
section shall also be retained for 5 years.
    (7) Monitoring data recorded during periods of monitoring system 
breakdowns, repairs, calibration checks, and zero (low-level) and high-
level adjustments shall not be included in any average computed under 
this subpart. Records shall be kept of the times and durations of all 
such periods.
    (8) In addition to the periods specified in paragraph (d)(7) of 
this section, records shall be kept of the times and durations of any 
other periods during process operation or control device operation when 
monitors are not operating. For batch process vents, this paragraph 
(d)(8) only applies during batch emission episodes, or portions 
thereof, that the owner or operator has selected to control.
    (9) For each TPPU that is not part of the affected source because 
it does not use as a reactant or process solvent, or produce as a by-
product or co-product any organic HAP, the owner or operator shall 
maintain the documentation specified in Sec. 63.1310(b)(1).
    (10) For each flexible operation unit in which the primary product 
is determined to be something other than a thermoplastic product, the 
owner or operator shall maintain the documentation specified in 
Sec. 63.1310(f)(6).
    (e) Reporting and notification.
    (1) In addition to the reports and notifications required by 
subparts A and H of this part, as specified in this

[[Page 48276]]

subpart, the owner or operator of an affected source shall prepare and 
submit the reports listed in paragraphs (e)(3) through (e)(8) of this 
section, as applicable.
    (2) All reports required under this subpart shall be sent to the 
Administrator at the addresses listed in Sec. 63.13. If acceptable to 
both the Administrator and the owner or operator of an affected source, 
reports may be submitted on electronic media.
    (3) Precompliance Report. Affected sources requesting an extension 
for compliance, or requesting approval to use alternative monitoring 
parameters, alternative continuous monitoring and recordkeeping, or 
alternative controls, shall submit a Precompliance Report according to 
the schedule described in paragraph (e)(3)(i) of this section. The 
Precompliance Report shall contain the information specified in 
paragraphs (e)(3)(ii) through (e)(3)(vi) of this section, as 
appropriate.
    (i) Submittal dates. The Precompliance Report shall be submitted to 
the Administrator no later than 12 months prior to the compliance date. 
For new affected sources, the Precompliance Report shall be submitted 
to the Administrator with the application for approval of construction 
or reconstruction required in paragraph (b)(2) of this section.
    (ii) A request for an extension for compliance must be submitted in 
the Precompliance Report, if it has not been submitted to the operating 
permit authority as part of the operating permit application. The 
request for a compliance extension will include the data outlined in 
Sec. 63.6(i)(6)(i) (A), (B), and (D), as required in 
Sec. 63.1311(e)(1).
    (iii) The alternative monitoring parameter information required in 
paragraph (f) of this section shall be submitted if, for any emission 
point, the owner or operator of an affected source seeks to comply 
through the use of a control technique other than those for which 
monitoring parameters are specified in this subpart or in subpart G of 
this part or seeks to comply by monitoring a different parameter than 
those specified in this subpart or in subpart G of this part.
    (iv) If the affected source seeks to comply using alternative 
continuous monitoring and recordkeeping as specified in paragraph (g) 
of this section, the information requested in paragraph (e)(3)(iv)(A) 
or (e)(3)(iv)(B) of this section must be submitted in the Precompliance 
Report.
    (A) The owner or operator must submit notification of the intent to 
use the provisions specified in paragraph (g) of this section; or
    (B) The owner or operator must submit a request for approval to use 
alternative continuous monitoring and recordkeeping provisions as 
specified in paragraph (g) of this section.
    (v) The owner or operator shall report the intent to use 
alternative controls to comply with the provisions of this subpart. 
Alternative controls must be deemed by the Administrator to be 
equivalent to the controls required by the standard, under the 
procedures outlined in Sec. 63.6(g).
    (vi) If an owner or operator demonstrates that the emissions 
estimation equations contained in Sec. 63.1323(b) are inappropriate as 
specified in Sec. 63.1323(b)(6)(ii)(B), the information required by 
Sec. 63.1323(b)(6)(ii)(D) shall be submitted.
    (vii) If an owner or operator establishes parameter monitoring 
levels according to the procedures contained in Sec. 63.1334 (c) or 
(d), the information specified by Sec. 63.1334 (c) or (d), as 
appropriate.
    (4) Emissions Averaging Plan. For all existing affected sources 
using emissions averaging, an Emissions Averaging Plan shall be 
submitted for approval according to the schedule and procedures 
described in paragraph (e)(4)(i) of this section. The Emissions 
Averaging Plan shall contain the information specified in paragraph 
(e)(4)(ii) of this section, unless the information required in 
paragraph (e)(4)(ii) of this section is submitted with an operating 
permit application. An owner or operator of an affected source who 
submits an operating permit application instead of an Emissions 
Averaging Plan shall submit the information specified in paragraph 
(e)(8) of this section. In addition, a supplement to the Emissions 
Averaging Plan, as required under paragraph (e)(4)(iii) of this 
section, is to be submitted whenever alternative controls or operating 
scenarios may be used to comply with this subpart. Updates to the 
Emissions Averaging Plan shall be submitted in accordance with 
paragraph (e)(4)(iv) of this section.
    (i) Submittal and approval. The Emissions Averaging Plan shall be 
submitted no later than 18 months prior to the compliance date, and it 
is subject to Administrator approval. The Administrator shall determine 
within 120 operating days whether the Emissions Averaging Plan 
submitted presents sufficient information. The Administrator shall 
either approve the Emissions Averaging Plan, request changes, or 
request that the owner or operator submit additional information. Once 
the Administrator receives sufficient information, the Administrator 
shall approve, disapprove, or request changes to the plan within 120 
operating days.
    (ii) Information required. The Emissions Averaging Plan shall 
contain the information listed in paragraphs (e)(4)(ii)(A) through 
(e)(4)(ii)(K) of this section for all emission points included in an 
emissions average.
    (A) The required information shall include the identification of 
all emission points in the planned emissions average and, where 
applicable, notation of whether each storage vessel, continuous process 
vent, batch process vent, aggregate batch vent stream, and process 
wastewater stream is a Group 1 or Group 2 emission point, as defined in 
Sec. 63.1312 or as designated under Sec. 63.1332 (c)(3) through (c)(5).
    (B) The required information shall include the projected emission 
debits and credits for each emission point and the sum for the emission 
points involved in the average calculated according to Sec. 63.1332. 
The projected credits must be greater than or equal to the projected 
debits, as required under Sec. 63.1332(e)(3).
    (C) The required information shall include the specific control 
technology or pollution prevention measure that will be used for each 
emission point included in the average and date of application or 
expected date of application.
    (D) The required information shall include the specific 
identification of each emission point affected by a pollution 
prevention measure. To be considered a pollution prevention measure, 
the criteria in Sec. 63.1332(j)(1) must be met. If the same pollution 
prevention measure reduces or eliminates emissions from multiple 
emission points in the average, the owner or operator must identify 
each of these emission points.
    (E) The required information shall include a statement that the 
compliance demonstration, monitoring, inspection, recordkeeping, and 
reporting provisions in Sec. 63.1332 (m), (n), and (o) that are 
applicable to each emission point in the emissions average will be 
implemented beginning on or before the date of compliance.
    (F) The required information shall include documentation of the 
data listed in paragraphs (e)(4)(ii)(F)(1) through (e)(4)(ii)(F)(5) of 
this section for each storage vessel and continuous process vent 
subject to Sec. 63.1315 included in the average.
    (1) The required documentation shall include the values of the 
parameters used to determine whether the emission point is Group 1 or 
Group 2. Where TRE index value is used for continuous

[[Page 48277]]

process vent group determination, the estimated or measured values of 
the parameters used in the TRE equation in Sec. 63.115(d) and the 
resulting TRE index value shall be submitted.
    (2) The required documentation shall include the estimated values 
of all parameters needed for input to the emission debit and credit 
calculations in Sec. 63.1332 (g) and (h). These parameter values shall 
be specified in the affected source's Emissions Averaging Plan (or 
operating permit) as enforceable operating conditions. Changes to these 
parameters must be reported as required by paragraph (e)(4)(iv) of this 
section.
    (3) The required documentation shall include the estimated percent 
reduction if a control technology achieving a lower percent reduction 
than the efficiency of the applicable reference control technology or 
standard is or will be applied to the emission point.
    (4) The required documentation shall include the anticipated 
nominal efficiency if a control technology achieving a greater percent 
emission reduction than the efficiency of the reference control 
technology is or will be applied to the emission point. The procedures 
in Sec. 63.1332(i) shall be followed to apply for a nominal efficiency.
    (5) The required documentation shall include the operating plan 
required by Sec. 63.1314, as specified in Sec. 63.122 (a)(2) and (b) 
for each storage vessel controlled with a closed-vent system with a 
control device other than a flare.
    (G) The information specified in paragraph (f) of this section 
shall be included in the Emissions Averaging Plan for:
    (1) Each continuous process vent subject to Sec. 63.1315 controlled 
by a pollution prevention measure or control technique for which 
monitoring parameters or inspection procedures are not specified in 
Sec. 63.114; and
    (2) Each storage vessel controlled by pollution prevention or a 
control technique other than an internal or external floating roof or a 
closed vent system with a control device.
    (H) The required information shall include documentation of the 
data listed in paragraphs (e)(4)(ii)(H)(1) through (e)(4)(ii)(H)(5) of 
this section for each collection of continuous process vents located in 
a process section within the affected source subject to Sec. 63.1316 
(b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), or (c)(1) included in the 
average.
    (1) For continuous process vents subject to Sec. 63.1316(b)(1)(i), 
the required documentation shall include the values of the parameters 
used to determine whether the emission point is Group 1 or Group 2. 
Continuous process vents subject to Sec. 63.1316 (b)(1)(ii), (b)(2)(i), 
(b)(2)(ii), or (c)(1) are considered Group 1 emission points for 
purposes of emissions averaging, as specified in Sec. 63.1332(c)(5).
    (2) The required documentation shall include the estimated values 
of all parameters needed for input to the emission debit and credit 
calculations in Sec. 63.1332 (g) and (h). These parameter values shall 
be specified in the affected source's Emissions Averaging Plan (or 
operating permit) as enforceable operating conditions. Changes to these 
parameters must be reported as required by paragraph (e)(4)(iv) of this 
section.
    (3) For process sections generating debits or credits by comparing 
actual emissions expressed as kg HAP emissions per Mg of product to the 
applicable standard, the required documentation shall include the 
actual emission level expressed as kg HAP emissions per Mg of product.
    (4) For process sections using combustion control devices, the 
required documentation shall include the estimated percent reduction if 
a control technology achieving a lower percent reduction than the 
efficiency of the applicable reference control technology or standard 
is or will be applied to the emission point.
    (5) For process sections using combustion control devices, the 
required documentation shall include the anticipated nominal efficiency 
if a control technology achieving a greater percent emission reduction 
than the efficiency of the reference control technology is or will be 
applied to the emission point. The procedures in Sec. 63.1332(i) shall 
be followed to apply for a nominal efficiency.
    (I) For each pollution prevention measure or control device used to 
reduce air emissions of organic HAP from each collection of continuous 
process vents located in a process section within the affected source 
subject to Sec. 63.1316 (b)(1)(i), (b)(1)(ii), (b)(2)(i), (b)(2)(ii), 
or (c)(1) and for which no monitoring parameters or inspection 
procedures are specified in Sec. 63.114, the information specified in 
paragraph (f) of this section, Alternative Monitoring Parameters, shall 
be included in the Emissions Averaging Plan.
    (J) The required information shall include documentation of the 
data listed in paragraphs (e)(4)(ii)(J)(1) through (e)(4)(ii)(J)(3) of 
this section for each batch process vent and aggregate batch vent 
stream included in the average.
    (1) The required documentation shall include the values of the 
parameters used to determine whether the emission point is Group 1 or 
Group 2.
    (2) The required documentation shall include the estimated values 
of all parameters needed for input to the emission debit and credit 
calculations in Sec. 63.1332 (g) and (h). These parameter values shall 
be specified in the affected source's Emissions Averaging Plan (or 
operating permit) as enforceable operating conditions. Changes to these 
parameters must be reported as required by paragraph (e)(4)(iv) of this 
section.
    (3) For batch process vents, the required documentation shall 
include the estimated percent reduction for the batch cycle. For 
aggregate batch vent streams, the required documentation shall include 
the estimated percent reduction achieved on a continuous basis.
    (K) For each pollution prevention measure or control device used to 
reduce air emissions of organic HAP from batch process vents or 
aggregate batch vent streams and for which no monitoring parameters or 
inspection procedures are specified in Sec. 63.1324, the information 
specified in paragraph (f) of this section, Alternative Monitoring 
Parameters, shall be included in the Emissions Averaging Plan.
    (L) The required information shall include documentation of the 
data listed in paragraphs (e)(4)(ii)(L)(1) through (e)(4)(ii)(L)(4) of 
this section for each process wastewater stream included in the 
average.
    (1) The required documentation shall include the data used to 
determine whether the wastewater stream is a Group 1 or Group 2 
wastewater stream and the information specified in Table 14b of subpart 
G of this part for wastewater streams at new and existing affected 
sources.
    (2) The required documentation shall include the estimated values 
of all parameters needed for input to the wastewater emission credit 
and debit calculations in Sec. 63.1332 (g) and (h). These parameter 
values shall be specified in the affected source's Emissions Averaging 
Plan (or operating permit) as enforceable operating conditions. Changes 
to these parameters must be reported as required by paragraph 
(e)(4)(iv) of this section.
    (3) The required documentation shall include the estimated percent 
reduction if:
    (i) A control technology that achieves an emission reduction less 
than or equal to the emission reduction that would otherwise have been 
achieved by a steam stripper designed to the specifications found in 
Sec. 63.138(g) is or

[[Page 48278]]

will be applied to the wastewater stream;
    (ii) A control technology achieving less than or equal to 95 
percent emission reduction is or will be applied to the vapor stream(s) 
vented and collected from the treatment processes; or
    (iii) A pollution prevention measure is or will be applied.
    (4) The required documentation shall include the anticipated 
nominal efficiency if the owner or operator plans to apply for a 
nominal efficiency under Sec. 63.1332(i). A nominal efficiency shall be 
applied for if:
    (i) A control technology that achieves an emission reduction 
greater than the emission reduction that would have been achieved by a 
steam stripper designed to the specifications found in Sec. 63.138(g), 
is or will be applied to the wastewater stream; or
    (ii) A control technology achieving greater than 95 percent 
emission reduction is or will be applied to the vapor stream(s) vented 
and collected from the treatment processes.
    (M) For each pollution prevention measure, treatment process, or 
control device used to reduce air emissions of organic HAP from 
wastewater and for which no monitoring parameters or inspection 
procedures are specified in Sec. 63.143, the information specified in 
paragraph (f) of this section, Alternative Monitoring Parameters, shall 
be included in the Emissions Averaging Plan.
    (N) The required information shall include documentation of the 
data required by Sec. 63.1332(k). The documentation must demonstrate 
that the emissions from the emission points proposed to be included in 
the average will not result in greater hazard or, at the option of the 
Administrator, greater risk to human health or the environment than if 
the emission points were not included in an emissions average.
    (iii) Supplement to Emissions Averaging Plan. The owner or operator 
required to prepare an Emissions Averaging Plan under paragraph (e)(4) 
of this section shall also prepare a supplement to the Emissions 
Averaging Plan for any alternative controls or operating scenarios that 
may be used to achieve compliance.
    (iv) Updates to Emissions Averaging Plan. The owner or operator of 
an affected source required to submit an Emissions Averaging Plan under 
paragraph (e)(4) of this section shall also submit written updates of 
the Emissions Averaging Plan to the Administrator for approval under 
the circumstances described in paragraphs (e)(4)(iv)(A) and 
(e)(4)(iv)(B) of this section unless the relevant information has been 
included and submitted in an operating permit application or amendment.
    (A) The owner or operator who plans to make a change listed in 
either paragraph (e)(4)(iv)(A)(1) or (e)(4)(iv)(A)(2) of this section 
shall submit an Emissions Averaging Plan update at least 120 operating 
days prior to making the change.
    (1) An Emissions Averaging Plan update shall be submitted whenever 
an owner or operator elects to achieve compliance with the emissions 
averaging provisions in Sec. 63.1332 by using a control technique other 
than that specified in the Emissions Averaging Plan or plans to monitor 
a different parameter or operate a control device in a manner other 
than that specified in the Emissions Averaging Plan.
    (2) An Emissions Averaging Plan update shall be submitted whenever 
an emission point or a TPPU is added to an existing affected source and 
is planned to be included in an emissions average, or whenever an 
emission point not included in the emissions average described in the 
Emissions Averaging Plan is to be added to an emissions average. The 
information in paragraph (e)(4) of this section shall be updated to 
include the additional emission point.
    (B) The owner or operator who has made a change as defined in 
paragraph (e)(4)(iv)(B)(1) or (e)(4)(iv)(B)(2) of this section shall 
submit an Emissions Averaging Plan update within 90 operating days 
after the information regarding the change is known to the affected 
source. The update may be submitted in the next quarterly periodic 
report if the change is made after the date the Notification of 
Compliance Status is due.
    (1) An Emissions Averaging Plan update shall be submitted whenever 
a process change is made such that the group status of any emission 
point in an emissions average changes.
    (2) An Emissions Averaging Plan update shall be submitted whenever 
a value of a parameter in the emission credit or debit equations in 
Sec. 63.1332 (g) or (h) changes such that it is below the minimum or 
above the maximum established level specified in the Emissions 
Averaging Plan and causes a decrease in the projected credits or an 
increase in the projected debits.
    (C) The Administrator shall approve or request changes to the 
Emissions Averaging Plan update within 120 operating days of receipt of 
sufficient information regarding the change for emission points 
included in emissions averages.
    (5) Notification of Compliance Status. For existing and new 
affected sources, a Notification of Compliance Status shall be 
submitted within 150 operating days after the compliance dates 
specified in Sec. 63.1311. The notification shall contain the 
information listed in paragraphs (e)(5)(i) through (e)(5)(viii) of this 
section.
    (i) The results of any emission point group determinations, process 
section applicability determinations, performance tests, inspections, 
continuous monitoring system performance evaluations, any other 
information used to demonstrate compliance, and any other information 
required to be included in the Notification of Compliance Status under 
Sec. 63.122 for storage vessels, Sec. 63.117 for continuous process 
vents, Sec. 63.146 for process wastewater, Sec. 63.1316 through 
Sec. 63.1320 for continuous process vents subject to Sec. 63.1316, 
Sec. 63.1327 for batch process vents, Sec. 63.1329 for process contact 
cooling towers, and Sec. 63.1332 for emission points included in an 
emissions average. In addition, each owner or operator shall comply 
with paragraph (e)(5)(i)(A) and (e)(5)(i)(B) of this section.
    (A) For performance tests, group determinations, and process 
section applicability determinations that are based on measurements, 
the Notification of Compliance Status shall include one complete test 
report, as described in paragraph (e)(5)(i)(B) of this section, for 
each test method used for a particular kind of emission point. For 
additional tests performed for the same kind of emission point using 
the same method, the results and any other required information shall 
be submitted, but a complete test report is not required.
    (B) A complete test report shall include a brief process 
description, sampling site description, description of sampling and 
analysis procedures and any modifications to standard procedures, 
quality assurance procedures, record of operating conditions during the 
test, record of preparation of standards, record of calibrations, raw 
data sheets for field sampling, raw data sheets for field and 
laboratory analyses, documentation of calculations, and any other 
information required by the test method.
    (ii) For each monitored parameter for which a maximum or minimum 
level is required to be established under Sec. 63.120(d)(3) for storage 
vessels, Sec. 63.114(e) for continuous process vents, Sec. 63.1324 for 
batch process vents and aggregate batch vent streams, Sec. 63.143(f) 
for process wastewater, Sec. 63.1332(m) for emission points in 
emissions averages,

[[Page 48279]]

paragraph (e)(8) or (f) of this section, the Notification of Compliance 
Status shall contain the information specified in paragraphs 
(e)(5)(ii)(A) through (e)(5)(ii)(D) of this section, unless this 
information has been established and provided in the operating permit.
    (A) The required information shall include the specific maximum or 
minimum level of the monitored parameter(s) for each emission point.
    (B) The required information shall include the rationale for the 
specific maximum or minimum level for each parameter for each emission 
point, including any data and calculations used to develop the level 
and a description of why the level indicates proper operation of the 
control device.
    (C) The required information shall include a definition of the 
affected source's operating day, as specified in paragraph (d)(3)(ii) 
of this section, for purposes of determining daily average values or 
batch cycle daily average values of monitored parameters.
    (D) For batch process vents, the required information shall include 
a definition of each batch cycle that requires the control of one or 
more batch emission episodes during the cycle, as specified in 
Sec. 63.1325(c)(2) and Sec. 63.1334(b)(3)(iii).
    (iii) For emission points included in an emissions average, the 
Notification of Compliance Status shall contain the values of all 
parameters needed for input to the emission credit and debit equations 
in Sec. 63.1332 (g) and (h), calculated or measured according to the 
procedures in Sec. 63.1332 (g) and (h), and the resulting calculation 
of credits and debits for the first quarter of the year. The first 
quarter begins on the compliance date specified.
    (iv) The determination of applicability for flexible operation 
units as specified in Sec. 63.1310(f)(6).
    (v) The parameter monitoring levels for flexible operation units, 
and the basis on which these levels were selected, or a demonstration 
that these levels are appropriate at all times, as specified in 
Sec. 63.1310(f)(7).
    (vi) The results for each predominant use determination for storage 
vessels belonging to an affected source subject to this subpart that is 
made under Sec. 63.1310(g)(6).
    (vii) The results for each predominant use determination for 
recovery operation equipment belonging to an affected source subject to 
this subpart that is made under Sec. 63.1310(h)(6).
    (viii) For owners or operators of Group 2 batch process vents 
establishing a batch cycle limitation as specified in Sec. 63.1325(g), 
the affected source's operating year for purposes of determining 
compliance with the batch cycle limitation.
    (6) Periodic Reports. For existing and new affected sources, each 
owner or operator shall submit Periodic Reports as specified in 
paragraphs (e)(6)(i) through (e)(6)(xi) of this section.
    (i) Except as specified in paragraphs (e)(6)(x) and (e)(6)(xi) of 
this section, a report containing the information in paragraph 
(e)(6)(ii) of this section or containing the information in paragraphs 
(e)(6)(iii) through (e)(6)(ix) of this section, as appropriate, shall 
be submitted semiannually no later than 60 operating days after the end 
of each 180 day period. The first report shall be submitted no later 
than 240 days after the date the Notification of Compliance Status is 
due and shall cover the 6-month period beginning on the date the 
Notification of Compliance Status is due. Subsequent reports shall 
cover each preceding 6-month period.
    (ii) If none of the compliance exceptions specified in paragraphs 
(e)(6)(iii) through (e)(6)(ix) of this section occurred during the 6-
month period, the Periodic Report required by paragraph (e)(6)(i) of 
this section shall be a statement that the affected source was in 
compliance for the preceding 6-month period and no activities specified 
in paragraphs (e)(6)(iii) through (e)(6)(ix) of this section occurred 
during the preceding 6-month period.
    (iii) For an owner or operator of an affected source complying with 
the provisions of Secs. 63.1314 through 63.1330 for any emission point 
or process section, Periodic Reports shall include:
    (A) All information specified in Sec. 63.122 for storage vessels; 
Secs. 63.117 and 63.118 and Sec. 63.1320 for continuous process vents, 
as applicable; Sec. 63.1327 for batch process vents and aggregate batch 
vent streams; Sec. 63.104 for heat exchange systems; and Sec. 63.146 
for process wastewater;
    (B) The daily average values or batch cycle daily average values of 
monitored parameters for both excused excursions, as defined in 
Sec. 63.1334(g), and unexcused excursions, as defined in 
Sec. 63.1334(f). For excursions caused by lack of monitoring data, the 
duration of periods when monitoring data were not collected shall be 
specified;
    (C) The periods when monitoring data were not collected shall be 
specified;
    (D) The information in paragraphs (e)(6)(iii)(D)(1) through 
(e)(6)(iii)(D)(3) of this section, as applicable:
    (1) Any supplements to the Emissions Averaging Plan, as required in 
paragraph (e)(4)(iii) of this section;
    (2) Notification if a process change is made such that the group 
status of any emission point changes. The information submitted shall 
include a compliance schedule, as specified in paragraphs 
(e)(6)(iii)(D)(2)(i) and (e)(6)(iii)(D)(2)(ii) of this section, for 
emission points that are added or that change from Group 2 to Group 1 
as specified in Sec. 63.1310(i)(2)(ii); for continuous process vents 
under the conditions listed in Sec. 63.1315(a)(12) or 
Sec. 63.1320(b)(3), as applicable; or for batch process vents under the 
conditions listed in Sec. 63.1327(b) or Sec. 63.1327(d). This 
information may be submitted in a separate report, as specified in 
Sec. 63.1315(a)(12), Sec. 63.1320(b)(3), Sec. 63.1327(b), or 
Sec. 63.1327(d); and
    (i) The owner or operator shall submit to the Administrator for 
approval a compliance schedule and a justification for the schedule.
    (ii) The Administrator shall approve the compliance schedule or 
request changes within 120 operating days of receipt of the compliance 
schedule and justification.
    (3) Notification if one or more emission point(s) or one or more 
TPPU is added to an affected source. The owner or operator shall submit 
the information contained in paragraphs (e)(6)(iii)(D)(3)(i) through 
(e)(6)(iii)(D)(3)(iii) of this section:
    (i) A description of the addition to the affected source;
    (ii) Notification of the group status of the additional emission 
point or all emission points in the TPPU; and
    (iii) A compliance schedule, as required under paragraph 
(e)(6)(iii)(D)(2) of this section.
    (E) The information in paragraph (b)(1)(ii) of this section for 
reports of start-up, shutdown, and malfunction.
    (iv) For each batch process vent with a batch cycle limitation, 
every second Periodic Report shall include the type and number of batch 
cycles accomplished during the preceding 12-month period and a 
statement that the batch process vent is either in or out of compliance 
with the batch cycle limitation.
    (v) If any performance tests are reported in a Periodic Report, the 
following information shall be included:
    (A) One complete test report shall be submitted for each test 
method used for a particular kind of emission point tested. A complete 
test report shall contain the information specified in paragraph 
(e)(5)(i)(B) of this section.
    (B) For additional tests performed for the same kind of emission 
point using the same method, results and any other information required 
shall be submitted, but a complete test report is not required.

[[Page 48280]]

    (vi) The Periodic Report shall include the results for each change 
made to a primary product determination for a thermoplastic product 
made under Sec. 63.1310(f)(6).
    (vii) The Periodic Report shall include the results for each change 
made to a predominant use determination for a storage vessel belonging 
to an affected source subject to this subpart that is made under 
Sec. 63.1310(g)(6).
    (viii) The Periodic Report shall include the results for each 
change made to a predominant use determination for recovery operation 
equipment belonging to an affected source subject to this subpart that 
is made under Sec. 63.1310(h)(6).
    (ix) The Periodic Report required by Sec. 63.1331(a)(5) may be 
submitted as part of the Periodic Report required by paragraph (e)(6) 
of this section.
    (x) The owner or operator of an affected source shall submit 
quarterly reports for all emission points included in an emissions 
average.
    (A) The quarterly reports shall be submitted no later than 60 
operating days after the end of each quarter. The first report shall be 
submitted with the Notification of Compliance Status no later than 150 
days after the compliance date.
    (B) The quarterly reports shall include the information specified 
in paragraphs (e)(6)(x)(B)(1) through (e)(6)(x)(B)(7) of this section 
for all emission points included in an emissions average.
    (1) The credits and debits calculated each month during the 
quarter;
    (2) A demonstration that debits calculated for the quarter are not 
more than 1.30 times the credits calculated for the quarter, as 
required under Sec. 63.1332(e)(4);
    (3) The values of any inputs to the debit and credit equations in 
Sec. 63.1332(g) and (h) that change from month to month during the 
quarter or that have changed since the previous quarter;
    (4) Results of any performance tests conducted during the reporting 
period including one complete report for each test method used for a 
particular kind of emission point as described in paragraph (e)(6)(v) 
of this section;
    (5) Reports of daily average (or batch cycle daily average) values 
of monitored parameters for excursions as defined in Sec. 63.1334(f);
    (6) For excursions caused by lack of monitoring data, the duration 
of periods when monitoring data were not collected shall be specified; 
and
    (7) Any other information the affected source is required to report 
under the operating permit or Emissions Averaging Plan for the affected 
source.
    (C) Sec. 63.1334 shall govern the use of monitoring data to 
determine compliance for Group 1 and Group 2 emission points included 
in emissions averages.
    (D) Every fourth quarterly report shall include the following:
    (1) A demonstration that annual credits are greater than or equal 
to annual debits as required by Sec. 63.1332(e)(3); and
    (2) A certification of compliance with all the emissions averaging 
provisions in Sec. 63.1332.
    (xi) The owner or operator of an affected source shall submit 
quarterly reports for particular emission points and process sections 
not included in an emissions average as specified in paragraphs 
(e)(6)(xi)(A) through (e)(6)(xi)(E) of this section.
    (A) If requested by the Administrator, the owner or operator of an 
affected source shall submit quarterly reports for a period of 1 year 
for an emission point or process section that is not included in an 
emissions average if either condition in paragraph (e)(6)(xi)(A)(1) or 
(e)(6)(xi)(A)(2) of this section is met.
    (1) An emission point has any excursions, as defined in 
Sec. 63.1334(f), for a semiannual reporting period.
    (2) A process section subject to Sec. 63.1316 is out of compliance 
with its applicable standard.
    (B) The quarterly reports shall include all information specified 
in paragraphs (e)(6)(iii) through (e)(6)(ix) of this section applicable 
to the emission point or process section for which quarterly reporting 
is required under paragraph (e)(6)(xi)(A) of this section. Information 
applicable to other emission points within the affected source shall be 
submitted in the semiannual reports required under paragraph (e)(6)(i) 
of this section.
    (C) Quarterly reports shall be submitted no later than 60 operating 
days after the end of each quarter.
    (D) After quarterly reports have been submitted for an emission 
point for 1 year, the owner or operator may return to semiannual 
reporting for the emission point or process section unless the 
Administrator requests the owner or operator to continue to submit 
quarterly reports.
    (E) Sec. 63.1334 shall govern the use of monitoring data to 
determine compliance for Group 1 emission points.
    (7) Other reports. Other reports shall be submitted as specified in 
paragraphs (e)(7)(i) through (e)(7)(ii) of this section.
    (i) For storage vessels, the notifications of inspections required 
by Sec. 63.1314 shall be submitted as specified in Sec. 63.122 (h)(1) 
and (h)(2).
    (ii) For owners or operators of affected sources required to 
request approval for a nominal control efficiency for use in 
calculating credits for an emissions average, the information specified 
in Sec. 63.1332(i) shall be submitted.
    (8) Operating permit. An owner or operator who submits an operating 
permit application instead of an Emissions Averaging Plan or a 
Precompliance Report shall submit the following information with the 
operating permit application:
    (i) The information specified in paragraph (e)(4) of this section 
for points included in an emissions average;
    (ii) The information specified in paragraph (e)(5) of this section, 
Notification of Compliance Status, as applicable; and
    (iii) The information specified in paragraph (e)(3) of this 
section, Precompliance Report, as applicable.
    (f) Alternative monitoring parameters. The owner or operator who 
has been directed by any section of this subpart to set unique 
monitoring parameters, or who requests approval to monitor a different 
parameter than those specified in Sec. 63.1314 for storage vessels, 
Sec. 63.1315 or 63.1317, as appropriate, for continuous process vents, 
Sec. 63.1321 for batch process vents and aggregate batch vent streams, 
or Sec. 63.1330 for wastewater shall submit the information specified 
in paragraphs (f)(1) through (f)(3) of this section in the 
Precompliance Report, as required by paragraph (e)(3) of this section. 
The owner or operator shall retain for a period of 5 years each record 
required by paragraphs (f)(1) through (f)(3) of this section.
    (1) The required information shall include a description of the 
parameter(s) to be monitored to ensure the recovery device, control 
device, or pollution prevention measure is operated in conformance with 
its design and achieves the specified emission limit, percent 
reduction, or nominal efficiency, and an explanation of the criteria 
used to select the parameter(s).
    (2) The required information shall include a description of the 
methods and procedures that will be used to demonstrate that the 
parameter indicates proper operation, the schedule for this 
demonstration, and a statement that the owner or operator will 
establish a level for the monitored parameter as part of the 
Notification of Compliance Status report required in paragraph (e)(5) 
of this section, unless this information has already been included in 
the operating permit application.
    (3) The required information shall include a description of the 
proposed

[[Page 48281]]

monitoring, recordkeeping, and reporting system, to include the 
frequency and content of monitoring, recordkeeping, and reporting. 
Further, the rationale for the proposed monitoring, recordkeeping, and 
reporting system shall be included if either condition in paragraph 
(f)(3)(i) or (f)(3)(ii) of this section is met:
    (i) If monitoring and recordkeeping is not continuous; or
    (ii) If reports of daily average values will not be included in 
Periodic Reports when the monitored parameter value is above the 
maximum level or below the minimum level as established in the 
operating permit or the Notification of Compliance Status.
    (g) Alternative continuous monitoring and recordkeeping. An owner 
or operator choosing not to implement the provisions listed in 
Sec. 63.1315 or 63.1317, as appropriate, for continuous process vents, 
Sec. 63.1321 for batch process vents and aggregate batch vent streams, 
Sec. 63.1314 for storage vessels, or Sec. 63.1330 for wastewater, may 
instead request approval to use alternative continuous monitoring and 
recordkeeping provisions according to the procedures specified in 
paragraphs (g)(1) through (g)(4) of this section. Requests shall be 
submitted in the Precompliance Report as specified in paragraph (e)(3) 
of this section, if not already included in the operating permit 
application, and shall contain the information specified in paragraphs 
(g)(2)(ii) and (g)(3)(ii) of this section, as applicable.
    (1) The provisions in Sec. 63.8(f)(5)(i) shall govern the review 
and approval of requests.
    (2) An owner or operator of an affected source that does not have 
an automated monitoring and recording system capable of measuring 
parameter values at least once every 15 minutes and that does not 
generate continuous records may request approval to use a nonautomated 
system with less frequent monitoring, in accordance with paragraphs 
(g)(2)(i) and (g)(2)(ii) of this section.
    (i) The requested system shall include manual reading and recording 
of the value of the relevant operating parameter no less frequently 
than once per hour. Daily average (or batch cycle daily average) values 
shall be calculated from these hourly values and recorded.
    (ii) The request shall contain:
    (A) A description of the planned monitoring and recordkeeping 
system;
    (B) Documentation that the affected source does not have an 
automated monitoring and recording system;
    (C) Justification for requesting an alternative monitoring and 
recordkeeping system; and
    (D) Demonstration to the Administrator's satisfaction that the 
proposed monitoring frequency is sufficient to represent control or 
recovery device operating conditions, considering typical variability 
of the specific process and control or recovery device operating 
parameter being monitored.
    (3) An owner or operator may request approval to use an automated 
data compression recording system that does not record monitored 
operating parameter values at a set frequency (for example, once every 
15 minutes) but records all values that meet set criteria for variation 
from previously recorded values, in accordance with paragraphs 
(g)(3)(i) and (g)(3)(ii) of this section.
    (i) The requested system shall be designed to:
    (A) Measure the operating parameter value at least once every 15 
minutes;
    (B) Except for the monitoring of batch process vents, calculate 
hourly average values each hour during periods of operation;
    (C) Record the date and time when monitors are turned off or on;
    (D) Recognize unchanging data that may indicate the monitor is not 
functioning properly, alert the operator, and record the incident;
    (E) Calculate daily average (or batch cycle daily average) values 
of the monitored operating parameter based on all measured data; and
    (F) If the daily average is not an excursion, as defined in 
Sec. 63.1334(f), the data for that operating day may be converted to 
hourly average values and the four or more individual records for each 
hour in the operating day may be discarded.
    (ii) The request shall contain:
    (A) A description of the monitoring system and data compression 
recording system, including the criteria used to determine which 
monitored values are recorded and retained;
    (B) The method for calculating daily averages and batch cycle daily 
averages; and
    (C) A demonstration that the system meets all criteria in paragraph 
(g)(3)(i) of this section.
    (4) An owner or operator may request approval to use other 
alternative monitoring systems according to the procedures specified in 
Sec. 63.8(f).
    (h) Reduced recordkeeping program. For any parameter with respect 
to any item of equipment, the owner or operator may implement the 
recordkeeping requirements specified in paragraph (h)(1) or (h)(2) of 
this section as alternatives to the provisions specified in 
Sec. 63.1314 for storage vessels, Sec. 63.1315 or 63.1317, as 
appropriate, for continuous process vents, Sec. 63.1321 for batch 
process vents and aggregate batch vent streams, or Sec. 63.1330 for 
wastewater. The owner or operator shall retain for a period of 5 years 
each record required by paragraph (h)(1) or (h)(2) of this section.
    (1) The owner or operator may retain only the daily average (or 
batch cycle daily average) value, and is not required to retain more 
frequent monitored operating parameter values, for a monitored 
parameter with respect to an item of equipment, if the requirements of 
paragraphs (h)(1)(i) through (h)(1)(vi) of this section are met. An 
owner or operator electing to comply with the requirements of paragraph 
(h)(1) of this section shall notify the Administrator in the 
Notification of Compliance Status or, if the Notification of Compliance 
Status has already been submitted, in the Periodic Report immediately 
preceding implementation of the requirements of paragraph (h)(1) of 
this section.
    (i) The monitoring system is capable of detecting unrealistic or 
impossible data during periods of operation other than start-ups, 
shutdowns, or malfunctions (e.g., a temperature reading of -200  deg.C 
on a boiler), and will alert the operator by alarm or other means. The 
owner or operator shall record the occurrence. All instances of the 
alarm or other alert in an operating day constitute a single 
occurrence.
    (ii) The monitoring system generates, updated at least hourly 
throughout each operating day, a running average of the monitoring 
values that have been obtained during that operating day, and the 
capability to observe this running average is readily available to the 
Administrator on-site during the operating day. The owner or operator 
shall record the occurrence of any period meeting the criteria in 
paragraphs (h)(1)(ii)(A) through (h)(1)(ii)(C) of this section. All 
instances in an operating day constitute a single occurrence.
    (A) The running average is above the maximum or below the minimum 
established limits;
    (B) The running average is based on at least six 1-hour periods; 
and
    (C) The running average reflects a period of operation other than a 
start-up, shutdown, or malfunction.
    (iii) The monitoring system is capable of detecting unchanging data 
during periods of operation other than start-ups, shutdowns, or 
malfunctions, except in circumstances where the presence of unchanging 
data is the expected

[[Page 48282]]

operating condition based on past experience (e.g., pH in some 
scrubbers), and will alert the operator by alarm or other means. The 
owner or operator shall record the occurrence. All instances of the 
alarm or other alert in an operating day constitute a single 
occurrence.
    (iv) The monitoring system will alert the owner or operator by an 
alarm, if the running average parameter value calculated under 
paragraph (h)(1)(ii) of this section reaches a set point that is 
appropriately related to the established limit for the parameter that 
is being monitored.
    (v) The owner or operator shall verify the proper functioning of 
the monitoring system, including its ability to comply with the 
requirements of paragraph (h)(1) of this section, at the times 
specified in paragraphs (h)(1)(v)(A) through (h)(1)(v)(C). The owner or 
operator shall document that the required verifications occurred.
    (A) Upon initial installation.
    (B) Annually after initial installation.
    (C) After any change to the programming or equipment constituting 
the monitoring system, which might reasonably be expected to alter the 
monitoring system's ability to comply with the requirements of this 
section.
    (vi) The owner or operator shall retain the records identified in 
paragraphs (h)(1)(vi)(A) through (h)(1)(vi)(C) of this section.
    (A) Identification of each parameter, for each item of equipment, 
for which the owner or operator has elected to comply with the 
requirements of paragraph (h) of this section.
    (B) A description of the applicable monitoring system(s), and of 
how compliance will be achieved with each requirement of paragraphs 
(h)(1)(i) through (h)(1)(v) of this section. The description shall 
identify the location and format (e.g., on-line storage, log entries) 
for each required record. If the description changes, the owner or 
operator shall retain both the current and the most recent superseded 
description.
    (C) A description, and the date, of any change to the monitoring 
system that would reasonably be expected to affect its ability to 
comply with the requirements of paragraph (h)(1) of this section.
    (2) If an owner or operator has elected to implement the 
requirements of paragraph (h)(1) of this section for a monitored 
parameter with respect to an item of equipment and a period of 6 
consecutive months has passed without an excursion as defined in 
paragraph (h)(2)(iv) of this section, the owner or operator is no 
longer required to record the daily average (or batch cycle daily 
average) value for any operating day when the daily average (or batch 
cycle daily average) value is less than the maximum or greater than the 
minimum established limit. With approval by the Administrator, 
monitoring data generated prior to the compliance date of this subpart 
shall be credited toward the period of 6 consecutive months, if the 
parameter limit and the monitoring accomplished during the period prior 
to the compliance date was required and/or approved by the 
Administrator.
    (i) If the owner or operator elects not to retain the daily average 
(or batch cycle daily average) values, the owner or operator shall 
notify the Administrator in the next Periodic Report. The notification 
shall identify the parameter and unit of equipment.
    (ii) If, on any operating day after the owner or operator has 
ceased recording daily average (or batch cycle daily average) values as 
provided in paragraph (h)(2) of this section, there is an excursion as 
defined in paragraph (h)(2)(iv) of this section, the owner or operator 
shall immediately resume retaining the daily average (or batch cycle 
daily average) value for each operating day and shall notify the 
Administrator in the next Periodic Report. The owner or operator shall 
continue to retain each daily average (or batch cycle daily average) 
value until another period of 6 consecutive months has passed without 
an excursion as defined in paragraph (h)(2)(iv) of this section.
    (iii) The owner or operator shall retain the records specified in 
paragraphs (h)(1)(i), (h)(1)(ii), and (h)(1)(vi) of this section, for 
the duration specified in paragraph (h) of this section. For any 
calendar week, if compliance with paragraphs (h)(1)(i) through 
(h)(1)(iv) of this section does not result in retention of a record of 
at least one occurrence or measured parameter value, the owner or 
operator shall record and retain at least one parameter value during a 
period of operation other than a start-up, shutdown, or malfunction.
    (iv) For purposes of paragraph (h) of this section, an excursion 
means that the daily average (or batch cycle daily average) value of 
monitoring data for a parameter is greater than the maximum, or less 
than the minimum established value, except as provided in paragraphs 
(h)(2)(iv)(A) and (h)(2)(iv)(B) of this section.
    (A) The daily average (or batch cycle daily average) value during 
any start-up, shutdown, or malfunction shall not be considered an 
excursion for purposes of paragraph (h)(2) of this section, if the 
owner or operator follows the applicable provisions of the start-up, 
shutdown, and malfunction plan required by Sec. 63.6(e)(3).
    (B) An excused excursion, as described in Sec. 63.1334(g), shall 
not be considered an excursion for purposes of paragraph (h)(2) of this 
section.
Tables to Subpart JJJ of Part 63

                  Table 1.--Applicability of General Provisions to Subpart JJJ Affected Sources                 
----------------------------------------------------------------------------------------------------------------
                     Reference                         Applies to  subpart JJJ                Comment           
----------------------------------------------------------------------------------------------------------------
63.1(a)(1)........................................  Yes..........................  Sec.  63.1312 specifies      
                                                                                    definitions in addition to  
                                                                                    or that supersede           
                                                                                    definitions in Sec.  63.2.  
63.1(a)(2)-63.1(a)(3).............................  Yes.                                                        
63.1(a)(4)........................................  Yes..........................  Subpart JJJ (this table)     
                                                                                    specifies the applicability 
                                                                                    of each paragraph in subpart
                                                                                    A to subpart JJJ.           
63.1(a)(5)........................................  No...........................  Reserved.                    
63.1(a)(6)-63.1(a)(8).............................  Yes.                                                        
63.1(a)(9)........................................  No...........................  Reserved.                    
63.1(a)(10).......................................  No...........................  Subpart JJJ and other cross- 
                                                                                    referenced subparts specify 
                                                                                    calendar or operating day.  
63.1(a)(11).......................................  Yes.                                                        
63.1(a)(12)-63.1(a)(14)...........................  Yes.                                                        
63.1(b)(1)........................................  Yes..........................  Subpart JJJ (this table)     
                                                                                    specifies the applicability 
                                                                                    of each paragraph in subpart
                                                                                    A to subpart JJJ.           
63.1(b)(2)........................................  Yes.                                                        

[[Page 48283]]

                                                                                                                
63.1(b)(3)........................................  No...........................  Sec.  63.1310(b) provides    
                                                                                    documentation requirements  
                                                                                    for TPPUs not considered    
                                                                                    affected sources.           
63.1(c)(1)........................................  Yes..........................  Subpart JJJ (this table)     
                                                                                    specifies the applicability 
                                                                                    of each paragraph in subpart
                                                                                    A to subpart JJJ.           
63.1(c)(2)........................................  No...........................  Area sources are not subject 
                                                                                    to subpart JJJ.             
63.1(c)(3)........................................  No...........................  Reserved.                    
63.1(c)(4)........................................  Yes.                                                        
63.1(c)(5)........................................  Yes..........................  Except that affected sources 
                                                                                    are not required to submit  
                                                                                    notifications overridden by 
                                                                                    this table.                 
63.1(d)...........................................  No...........................  Reserved.                    
63.1(e)...........................................  Yes.                                                        
63.2..............................................  Yes..........................  Sec.  63.1312 specifies those
                                                                                    subpart A definitions that  
                                                                                    apply to subpart JJJ.       
63.3..............................................  Yes..........................  Subpart JJJ specifies those  
                                                                                    units of measure that apply 
                                                                                    to subpart JJJ.             
63.4(a)(1)-63.4(a)(3).............................  Yes.                                                        
63.4(a)(4)........................................  No...........................  Reserved.                    
63.4(a)(5)........................................  Yes.                                                        
63.4(b)...........................................  Yes.                                                        
63.4(c)...........................................  Yes.                                                        
63.5(a)...........................................  Yes.                                                        
63.5(b)(1)........................................  Yes.                                                        
63.5(b)(2)........................................  No...........................  Reserved.                    
63.5(b)(3)........................................  Yes.                                                        
63.5(b)(4)........................................  No...........................  Area sources are not subject 
                                                                                    to subpart JJJ.             
63.5(b)(5)........................................  Yes.                                                        
63.5(b)(6)........................................  No...........................  Sec.  63.1310(i) specifies   
                                                                                    requirements.               
63.5(c)...........................................  No...........................  Reserved.                    
63.5(d)(1)(i).....................................  No.                                                         
63.5(d)(1)(ii)....................................  Yes..........................  Except that for affected     
                                                                                    sources subject to subpart  
                                                                                    JJJ, emission estimates     
                                                                                    specified in Sec.           
                                                                                    63.5(d)(1)(ii)(H) are not   
                                                                                    required.                   
63.5(d)(1)(iii)...................................  Yes..........................  Except that Sec.             
                                                                                    63.1335(e)(5) specifies     
                                                                                    Notification of Compliance  
                                                                                    Status requirements.        
63.5(d)(2)........................................  No.                                                         
63.5(d)(3)........................................  Yes..........................  Except Sec.  63.5(d)(3)(ii)  
                                                                                    does not apply.             
63.5(d)(4)........................................  Yes.                                                        
63.5(e)...........................................  Yes.                                                        
63.5(f)(1)........................................  Yes.                                                        
63.5(f)(2)........................................  Yes..........................  Except that where Sec.       
                                                                                    63.5(d)(1) is referred to,  
                                                                                    Sec.  63.5(d)(1)(i) does not
                                                                                    apply.                      
63.6(a)...........................................  Yes.                                                        
63.6(b)(1)........................................  Yes.                                                        
63.6(b)(2)........................................  Yes.                                                        
63.6(b)(3)........................................  Yes.                                                        
63.6(b)(4)........................................  Yes.                                                        
63.6(b)(5)........................................  Yes.                                                        
63.6(b)(6)........................................  No...........................  Reserved.                    
63.6(b)(7)........................................  Yes.                                                        
63.6(c)(1)........................................  Yes..........................  Sec.  63.1311 specifies the  
                                                                                    compliance date.            
63.6(c)(2)........................................  Yes.                                                        
63.6(c)(3)........................................  No...........................  Reserved.                    
63.6(c)(4)........................................  No...........................  Reserved.                    
63.6(c)(5)........................................  Yes.                                                        
63.6(d)...........................................  No...........................  Reserved.                    
63.6(e)...........................................  Yes..........................  Except the plan, and any     
                                                                                    records or reports of start-
                                                                                    up, shutdown and malfunction
                                                                                    do not apply to Group 2     
                                                                                    emission points, unless they
                                                                                    are included in an emissions
                                                                                    average.                    
63.6(f)(1)........................................  Yes.                                                        
63.6(f)(2)........................................  Yes..........................  Except Sec.  63.7(c), as     
                                                                                    referred to in Sec.         
                                                                                    63.6(f)(2)(iii)(D), does not
                                                                                    apply.                      
63.6(f)(3)........................................  Yes.                                                        
63.6(g)...........................................  Yes.                                                        
63.6(h)...........................................  No...........................  Subpart JJJ does not require 
                                                                                    opacity and visible emission
                                                                                    standards.                  
63.6(i)...........................................  Yes..........................  Except for Sec.  63.6(i)(15),
                                                                                    which is reserved.          
63.6(j)...........................................  Yes.                                                        
63.7(a)(1)........................................  Yes.                                                        
63.7(a)(2)........................................  No...........................  Sec.  63.1335(e)(5) specifies
                                                                                    submittal dates.            
63.7(a)(3)........................................  Yes.                                                        
63.7(b)...........................................  No...........................  Sec.  63.1333(a)(4) specifies
                                                                                    notification requirements.  
63.7(c)...........................................  No.                                                         
63.7(d)...........................................  Yes.                                                        
63.7(e)...........................................  Yes..........................  Except that performance tests
                                                                                    must be conducted at maximum
                                                                                    representative operating    
                                                                                    conditions. In addition,    
                                                                                    some of the testing         
                                                                                    requirements specified in   
                                                                                    subpart JJJ are not         
                                                                                    consistent with Sec.        
                                                                                    63.7(e)(3).                 
63.7(f)...........................................  Yes.                                                        
63.7(g)...........................................  Yes..........................  Except that references to the
                                                                                    Notification of Compliance  
                                                                                    Status report in Sec.       
                                                                                    63.9(h) are replaced with   
                                                                                    the requirements in Sec.    
                                                                                    63.1335(e)(5).              

[[Page 48284]]

                                                                                                                
63.7(h)...........................................  Yes..........................  Except Sec.  63.7(h)(4)(ii)  
                                                                                    is not applicable, since the
                                                                                    site-specific test plans in 
                                                                                    Sec.  63.7(c)(3) are not    
                                                                                    required.                   
63.8(a)(1)........................................  Yes.                                                        
63.8(a)(2)........................................  No.                                                         
63.8(a)(3)........................................  No...........................  Reserved.                    
63.8(a)(4)........................................  Yes.                                                        
63.8(b)(1)........................................  Yes.                                                        
63.8(b)(2)........................................  No...........................  Subpart JJJ specifies        
                                                                                    locations to conduct        
                                                                                    monitoring.                 
63.8(b)(3).                                                                                                     
63.8(c)(1)(i).....................................  Yes.                                                        
63.8(c)(1)(ii)....................................  No.                                                         
63.8(c)(1)(iii)...................................  Yes.                                                        
63.8(c)(2)........................................  Yes.                                                        
63.8(c)(3)........................................  Yes.                                                        
63.8(c)(4)........................................  No...........................  Sec.  63.1334 specifies      
                                                                                    monitoring frequency.       
63.8(c)(5)-63.8(c)(8).............................  No.                                                         
63.8(d)...........................................  No.                                                         
63.8(e)...........................................  No.                                                         
63.8(f)(1)-63.8(f)(3).............................  Yes.                                                        
63.8(f)(4)(i).....................................  No...........................  Timeframe for submitting     
                                                                                    request is specified in Sec.
                                                                                     63.1335(e).                
63.8(f)(4)(ii)....................................  No.                                                         
63.8(f)(4)(iii)...................................  No.                                                         
63.8(f)(5)(i).....................................  Yes.                                                        
63.8(f)(5)(ii)....................................  No.                                                         
63.8(f)(5)(iii)...................................  Yes.                                                        
63.8(f)(6)........................................  No...........................  Subpart JJJ does not require 
                                                                                    continuous emission         
                                                                                    monitors.                   
63.8(g)...........................................  No...........................  Data reduction procedures    
                                                                                    specified in Sec.           
                                                                                    63.1335(d).                 
63.9(a)...........................................  Yes.                                                        
63.9(b)...........................................  No...........................  Subpart JJJ does not require 
                                                                                    an initial notification.    
63.9(c)...........................................  Yes.                                                        
63.9(d)...........................................  Yes.                                                        
63.9(e)...........................................  No.                                                         
63.9(f)...........................................  No...........................  Subpart JJJ does not require 
                                                                                    opacity and visible emission
                                                                                    standards.                  
63.9(g)...........................................  No.                                                         
63.9(h)...........................................  No...........................  Sec.  63.1335(e)(5) specifies
                                                                                    Notification of Compliance  
                                                                                    Status requirements.        
63.9(i)...........................................  Yes.                                                        
63.9(j)...........................................  No.                                                         
63.10(a)..........................................  Yes.                                                        
63.10(b)(1).......................................  Yes.                                                        
63.10(b)(2).......................................  Yes.                                                        
63.10(b)(3).......................................  No...........................  Sec.  63.1310(b) requires    
                                                                                    documentation of sources    
                                                                                    that are not affected       
                                                                                    sources.                    
63.10(c)..........................................  No...........................  Sec.  63.1335 specifies      
                                                                                    recordkeeping requirements. 
63.10(d)(1).......................................  Yes.                                                        
63.10(d)(2).......................................  No.                                                         
63.10(d)(3).......................................  No...........................  Subpart JJJ does not require 
                                                                                    opacity and visible emission
                                                                                    standards.                  
63.10(d)(4).......................................  Yes.                                                        
63.10(d)(5).......................................  Yes..........................  Except that reports required 
                                                                                    by Sec.  63.10(d)(5)(i) may 
                                                                                    be submitted at the same    
                                                                                    time as Periodic Reports    
                                                                                    specified in Sec.           
                                                                                    63.1335(e)(6). The start-up,
                                                                                    shutdown, and malfunction   
                                                                                    plan, and any records or    
                                                                                    reports of start-up,        
                                                                                    shutdown, and malfunction do
                                                                                    not apply to Group 2        
                                                                                    emission points unless they 
                                                                                    are included in an emissions
                                                                                    average.                    
63.10(e)..........................................  No.                                                         
63.10(f)..........................................  Yes.                                                        
63.10(d)(4).......................................  Yes.                                                        
63.12.............................................  Yes.                                                        
63.13.............................................  Yes.                                                        
63.14.............................................  Yes.                                                        
63.15.............................................  Yes.                                                        
----------------------------------------------------------------------------------------------------------------


     Table 2.--Group 1 Storage Vessels at Existing Affected Sources     
------------------------------------------------------------------------
                                                          Vapor pressure
             Vessel capacity (cubic meters)                      a      
                                                           (kilopascals)
------------------------------------------------------------------------
75  capacity < 151...........................  13.
                                                                       1
151  capacity................................  5.2
                                                                        
------------------------------------------------------------------------
a Maximum true vapor pressure of total organic HAP at storage           
  temperature.                                                          


[[Page 48285]]



       Table 3.--Group 1 Storage Vessels at Existing Affected Sources Producing the Listed Thermoplastics       
----------------------------------------------------------------------------------------------------------------
                                                                                                       Vapor    
           Thermoplastic                      Chemical a          Vessel capacity (cubic meters)    pressure b  
                                                                                                   (kilopascals)
----------------------------------------------------------------------------------------------------------------
ASA/AMSAN c........................  Styrene/acrylonitrile        3.78..........................            0.47
                                      mixture.                                                                  
                                     Acrylonitrile..............  75.7..........................            1.62
Polystyrene, continuous processes..  ...........................  38 and <75.7..................            14.2
                                                                  75.7..........................             1.9
Nitrile c..........................  Acrylonitrile..............   13.25........................            1.8 
----------------------------------------------------------------------------------------------------------------
a Vessel capacity and vapor pressure criteria are specific to the listed chemical. When chemical not listed     
  (i.e., --), vessel capacity and vapor pressure criteria apply to all chemicals regulated by this rule for a   
  given subcategory.                                                                                            
b Maximum true vapor pressure of total organic HAP at storage temperature.                                      
c The applicability criteria in Table 2 of this subpart shall be used for chemicals not specifically listed in  
  this table (i.e., Table 3).                                                                                   


        Table 4.--Group 1 Storage Vessels at New Affected Sources       
------------------------------------------------------------------------
                                                               Vapor    
             Vessel capacity (cubic meters)                 pressure a  
                                                           (kilopascals)
------------------------------------------------------------------------
38  capacity < 151...........................  13.
                                                                       1
151  capacity................................  0.7
                                                                        
------------------------------------------------------------------------
a Maximum true vapor pressure of total organic HAP at storage           
  temperature.                                                          


          Table 5.--Group 1 Storage Vessels at New Affected Sources Producing the Listed Thermoplastics         
----------------------------------------------------------------------------------------------------------------
                                                           Vessel capacity (cubic          Vapor pressure b     
          Thermoplastic                 Chemical a                meters)                   (kilopascals)       
----------------------------------------------------------------------------------------------------------------
ASA/AMSAN c......................  Styrene/             3.78............  0.47.           
                                    acrylonitrile                                                               
                                    mixture.                                                                    
                                   Acrylonitrile......  75.7............  1.62.           
SAN, continuous..................                       2,271...........  0.5vp<0.7.      
                                                        151.............  0.7vp
                                                                                      10.                       
                                                        30 and <151.....  vp10.           
                                                        151.............  vp10.           
Nitrile c........................  Acrylonitrile......  13.25...........  1.8.            
Polystyrene, continuous processes                       19.6 and <45.4..  vp7.48.         
                                                        45.4 and <109.8.  vp0.61.         
                                                        109.8...........  vp0.53.         
ABS, continuous mass.............  Styrene............  45.43...........  0.078.          
                                                        38 and <45.43...  vp13.1.         
                                                        45.43...........  vp0.53.         
----------------------------------------------------------------------------------------------------------------
a Vessel capacity and vapor pressure criteria are specific to the listed chemical. When chemical not listed     
  (i.e., --), vessel capacity and vapor pressure criteria apply to all chemicals regulated by this rule for a   
  given subcategory.                                                                                            
b Maximum true vapor pressure of total organic HAP at storage temperature.                                      
c The applicability criteria in Table 4 of this subpart shall be used for chemicals not specifically listed in  
  this table (i.e., Table 5).                                                                                   


                                      Table 6.--Known Organic Hazardous Air Pollutants From Thermoplastic Products                                      
--------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                      Organic HAP/chemical name (CAS No.)                               
                                                      --------------------------------------------------------------------------------------------------
          Thermoplastic product/subcategory                                              1,3                      Ethylene                              
                                                       Acetaldehyde  Acrylonitrile    Butadiene    1,4-Dioxane  Glycol (107-  Methanol (67- Styrene (100-
                                                         (75-07-0)     (107-13-1)    (106-99-0)    (123-91-1)       21-1)         56-1)         42-5)   
--------------------------------------------------------------------------------------------------------------------------------------------------------
ABS latex............................................  ............                 ............  ............  ............       
ABS using a batch emulsion process...................  ............                 ............  ............  ............       
ABS using a batch suspension process.................  ............                 ............  ............  ............       
ABS using a continuous emulsion process..............  ............                 ............  ............  ............       
ABS using a continuous mass process..................  ............                 ............  ............  ............       
ASA/AMSAN............................................  ............                 ............  ............  ............       
EPS..................................................  ............  .............  ............  ............  ............  ............       
MABS.................................................  ............                 ............  ............  ............       
MBS..................................................  ............  .............         ............  ............  ............       
Nitrile resin........................................  ............          ............  ............  ............  ............  ............
PET using a batch dimethyl terephthalate process.....         .............  ............                       ............
PET using a batch terephthalic acid process..........         .............  ............                ............  ............
PET using a continuous dimethyl terephthalate process         .............  ............                       ............
PET using a continuous terephthalic acid process.....         .............  ............                ............  ............

[[Page 48286]]

                                                                                                                                                        
PET using a continuous terephthalic acid high                                                                                                           
 viscosity multiple end finisher process.............         .............  ............                ............  ............
Polystyrene resin using a batch process..............  ............  .............  ............  ............  ............  ............       
Polystyrene resin using a continuous process.........  ............  .............  ............  ............  ............  ............       
SAN using a batch process............................  ............          ............  ............  ............  ............       
SAN using a continuous process.......................  ............          ............  ............  ............  ............       
--------------------------------------------------------------------------------------------------------------------------------------------------------
 AACAS No.=Chemical Abstract Service Number.                                                                                                            
 AAABS=Acrylonitrile butadiene styrene resin.                                                                                                           
 AAASA/AMSAN=Acrylonitrile styrene resin/alpha methyl styrene acrylonitrile resin.                                                                      
 AAEPS=expandable polystyrene resin.                                                                                                                    
 AAMABS=methyl methacrylate acrylonitrile butadiene styrene resin.                                                                                      
 AAPET=poly(ethylene terephthalate) resin.                                                                                                              
 AAAAN=styrene acrylonitrile resin.                                                                                                                     
 AAMBS=methyl methacrylate butadiene styrene resin.                                                                                                     


          Table 7.--Group 1 Batch Process Vents--Monitoring, Recordkeeping, and Reporting Requirements          
----------------------------------------------------------------------------------------------------------------
                                           Parameters to be       Recordkeeping and reporting requirements for  
            Control device                    monitored                       monitored parameters              
----------------------------------------------------------------------------------------------------------------
Thermal Incinerator..................  Firebox temperature a..  1. Continuous records as specified in Sec.      
                                                                 63.1326(e)(1).b                                
                                                                2. Record and report the average firebox        
                                                                 temperature measured during the performance    
                                                                 test--NCS.c                                    
                                                                3. Record the batch cycle daily average firebox 
                                                                 temperature as specified in Sec.               
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average         
                                                                 temperatures that are below the minimum        
                                                                 operating temperature established in the NCS or
                                                                 operating permit and all instances when        
                                                                 monitoring data are not collected--PR.d e      
Catalytic Incinerator................  Temperature upstream     1. Continuous records as specified in Sec.      
                                        and downstream of the    63.1326(e)(1).b                                
                                        catalyst bed.           2. Record and report the average upstream and   
                                                                 downstream temperatures and the average        
                                                                 temperature difference across the catalyst bed 
                                                                 measured during the performance test--NCS.c    
                                                                3. Record the batch cycle daily average upstream
                                                                 temperature and temperature difference across  
                                                                 catalyst bed as specified in Sec.              
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average upstream
                                                                 temperatures that are below the minimum        
                                                                 upstream temperature established in the NCS or 
                                                                 operating permit--PR.d e                       
                                                                5. Report all batch cycle daily average         
                                                                 temperature differences across the catalyst bed
                                                                 that are below the minimum difference          
                                                                 established in the NCS or operating permit--   
                                                                 PR.d e                                         
                                                                6. Report all instances when monitoring data are
                                                                 not collected.e                                
Boiler or Process Heater with a        Firebox temperature a..  1. Continuous records as specified in Sec.      
 design heat input capacity less than                            63.1326(e)(1).b                                
 44 megawatts and where the batch                               2. Record and report the average firebox        
 process vents or aggregate batch                                temperature measured during the performance    
 vent streams are not introduced with                            test--NCS.c                                    
 or used as the primary fuel.                                   3. Record the batch cycle daily average firebox 
                                                                 temperature as specified in Sec.               
                                                                 63.1326(e)(2).d                                
                                                                4. Report all batch cycle daily average         
                                                                 temperatures that are below the minimum        
                                                                 operating temperature established in the NCS or
                                                                 operating permit and all instances when        
                                                                 monitoring data are not collected--PR.d e      
Flare................................  Presence of a flame at   1. Hourly records of whether the monitor was    
                                        the pilot light.         continuously operating during batch emission   
                                                                 episodes, or portions thereof, selected for    
                                                                 control and whether the pilot flame was        
                                                                 continuously present during said periods.      
                                                                2. Record and report the presence of a flame at 
                                                                 the pilot light over the full period of the    
                                                                 compliance determination--NCS.c                
                                                                3. Record the times and durations of all periods
                                                                 during batch emission episodes, or portions    
                                                                 thereof, selected for control when a pilot     
                                                                 flame is absent or the monitor is not          
                                                                 operating.                                     
                                                                4. Report the times and durations of all periods
                                                                 during batch emission episodes, or portions    
                                                                 thereof, selected for control when all pilot   
                                                                 flames of a flare are absent--PR.d             

[[Page 48287]]

                                                                                                                
Scrubber for halogenated batch         pH of scrubber           1. Continuous records as specified in Sec.      
 process vents or aggregate batch       effluent, and.           63.1326(e)(1).b                                
 vent streams (Note: Controlled by a                            2. Record and report the average pH of the      
 combustion device other than a                                  scrubber effluent measured during the          
 flare).                                                         performance test--NCS.c                        
                                                                3. Record the batch cycle daily average pH of   
                                                                 the scrubber effluent as specified in Sec.     
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average pH      
                                                                 values of the scrubber effluent that are below 
                                                                 the minimum operating pH established in the NCS
                                                                 or operating permit and all instances when     
                                                                 monitoring data are not collected--PR.d e      
    Do...............................  Scrubber liquid flow     1. Continuous records as specified in Sec.      
                                        rate.                    63.1326(e)(1).b                                
                                                                2. Record and report the scrubber liquid flow   
                                                                 rate measured during the performance test--    
                                                                 NCS.c                                          
                                                                3. Record the batch cycle daily average scrubber
                                                                 liquid flow rate as specified in Sec.          
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average scrubber
                                                                 liquid flow rates that are below the minimum   
                                                                 flow rate established in the NCS or operating  
                                                                 permit and all instances when monitoring data  
                                                                 are not collected--PR.d e                      
Absorber f...........................  Exit temperature of the  1. Continuous records as specified in Sec.      
                                        absorbing liquid, and.   63.1326(e)(1).b                                
                                                                2. Record and report the average exit           
                                                                 temperature of the absorbing liquid measured   
                                                                 during the performance test--NCS.c             
                                                                3. Record the batch cycle daily average exit    
                                                                 temperature of the absorbing liquid as         
                                                                 specified in Sec.  63.1326(e)(2) for each batch
                                                                 cycle.                                         
                                                                4. Report all the batch cycle daily average exit
                                                                 temperatures of the absorbing liquid that are  
                                                                 below the minimum operating temperature        
                                                                 established in the NCS or operating permit and 
                                                                 all instances when monitoring data are not     
                                                                 collected--PR.d e                              
    Do...............................  Exit specific gravity    1. Continuous records as specified in Sec.      
                                        for the absorbing        63.1326(e)(1).b                                
                                        liquid.                 2. Record and report the average exit specific  
                                                                 gravity measured during the performance test-- 
                                                                 NCS.c                                          
                                                                3. Record the batch cycle daily average exit    
                                                                 specific gravity as specified in Sec.          
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average exit    
                                                                 specific gravity values that are below the     
                                                                 minimum operating temperature established in   
                                                                 the NCS or operating permit and all instances  
                                                                 when monitoring data are not collected--PR.d e 
Condenser f..........................  Exit (product side)      1. Continuous records as specified in Sec.      
                                        temperature.             63.1326(e)(1).b                                
                                                                2. Record and report the average exit           
                                                                 temperature measured during the performance    
                                                                 test--NCS.c                                    
                                                                3. Record the batch cycle daily average exit    
                                                                 temperature as specified in Sec.               
                                                                 63.1326(e)(2).                                 
                                                                4. Report all batch cycle daily average exit    
                                                                 temperatures that are above the maximum        
                                                                 operating temperature established in the NCS or
                                                                 operating permit and all instances when        
                                                                 monitoring data are not collected--PR.d e      
Carbon Adsorber f....................  Total regeneration       1. Record the total regeneration stream mass    
                                        stream mass flow         flow for each carbon bed regeneration cycle.   
                                        during carbon bed       2. Record and report the total regeneration     
                                        regeneration cycle(s),   stream mass flow during each carbon bed        
                                        and.                     regeneration cycle measured during the         
                                                                 performance test--NCS.c                        
                                                                3. Report all carbon bed regeneration cycles    
                                                                 when the total regeneration stream mass flow is
                                                                 above the maximum mass flow rate established in
                                                                 the NCS or operating permit--PR.d e            
    Do...............................  Temperature of the       1. Record the temperature of the carbon bed     
                                        carbon bed after         after each regeneration and within 15 minutes  
                                        regeneration and         of completing any cooling cycle(s).            
                                        within 15 minutes of    2. Record and report the temperature of the     
                                        completing any cooling   carbon bed after each regeneration and within  
                                        cycle(s).                15 minutes of completing any cooling cycles(s) 
                                                                 measured during the performance test--NCS.c    
                                                                3. Report all carbon bed regeneration cycles    
                                                                 when the temperature of the carbon bed after   
                                                                 regeneration, or within 15 minutes of          
                                                                 completing any cooling cycle(s), is above the  
                                                                 maximum temperature established in the NCS or  
                                                                 operating permit--PR.d e                       
All Control Devices..................  Presence of flow         1. Hourly records of whether the flow indicator 
                                        diverted to the          was operating during batch emission episodes,  
                                        atmosphere from the      or portions thereof, selected for control and  
                                        control device or.       whether flow was detected at any time during   
                                                                 said periods as specified in Sec.              
                                                                 63.1326(e)(3).                                 
                                                                2. Record and report the times and durations of 
                                                                 all periods during batch emission episodes, or 
                                                                 portions thereof, selected for control when    
                                                                 emissions are diverted through a bypass line or
                                                                 the flow indicator is not operating--PR.d      
    Do...............................  Monthly inspections of   1. Records that monthly inspections were        
                                        sealed valves.           performed as specified in Sec.                 
                                                                 63.1326(e)(4)(i).                              
                                                                2. Record and report all monthly inspections    
                                                                 that show the valves are not closed or the seal
                                                                 has been changed--PR.d                         

[[Page 48288]]

                                                                                                                
Absorber, Condenser, and Carbon        Concentration level or   1. Continuous records as specified in Sec.      
 Adsorber (as an alternative to the     reading indicated by     63.1326(e)(1).b                                
 requirements previously presented in   an organic monitoring   2. Record and report the average concentration  
 this table).                           device at the outlet     level or reading measured during the           
                                        of the control device.   performance test--NCS.c                        
                                                                3. Record the batch cycle daily average         
                                                                 concentration level or reading as specified in 
                                                                 Sec.  63.1326(e)(2).                           
                                                                4. Report all batch cycle daily average         
                                                                 concentration levels or readings that are above
                                                                 the maximum concentration or reading           
                                                                 established in the NCS or operating permit and 
                                                                 all instances when monitoring data are not     
                                                                 collected--PR.d e                              
----------------------------------------------------------------------------------------------------------------
a Monitor may be installed in the firebox or in the ductwork immediately downstream of the firebox before any   
  substantial heat exchange is encountered.                                                                     
b ``Continuous records'' is defined in Sec.  63.111.                                                            
c NCS = Notification of Compliance Status described in Sec.  63.1335(e)(5).                                     
d PR = Periodic Reports described in Sec.  63.1335(e)(6).                                                       
e The periodic reports shall include the duration of periods when monitoring data are not collected as specified
  in Sec.  63.1335(e)(6)(iii)(C).                                                                               
f Alternatively, these devices may comply with the organic monitoring device provisions listed at the end of    
  this table.                                                                                                   


 Table 8.--Operating Parameters for Which Levels Are Required to Be Established for Continuous and Batch Process
                                     Vents and Aggregate Batch Vent Streams                                     
----------------------------------------------------------------------------------------------------------------
                                                                                       Established operating    
                Device                         Parameters to be monitored                  parameter(s)         
----------------------------------------------------------------------------------------------------------------
Thermal incinerator...................  Firebox temperature.....................  Minimum temperature.          
Catalytic incinerator.................  Temperature upstream and downstream of    Minimum upstream temperature; 
                                         the catalyst bed.                         and minimum temperature      
                                                                                   difference across the        
                                                                                   catalyst bed.                
Boiler or process heater..............  Firebox temperature.....................  Minimum temperature.          
Scrubber for halogenated vents........  pH of scrubber effluent; and scrubber     Minimum pH; and minimum flow  
                                         liquid flow rate.                         rate.                        
Absorber..............................  Exit temperature of the absorbing         Minimum temperature; and      
                                         liquid; and exit specific gravity of      minimum specific gravity.    
                                         the absorbing liquid.                                                  
Condenser.............................  Exit temperature........................  Maximum temperature.          
Carbon absorber.......................  Total regeneration stream mass flow       Maximum mass flow; and maximum
                                         during carbon bed regeneration cycle;     temperature.                 
                                         and temperature of the carbon bed after                                
                                         regeneration (and within 15 minutes of                                 
                                         completing any cooling cycle(s)).                                      
Other devices (or as an alternate to    HAP concentration level or reading at     Maximum HAP concentration or  
 the requirements previously presented   outlet of device.                         reading.                     
 in this table)a.                                                                                               
----------------------------------------------------------------------------------------------------------------
a Concentration is measured instead of an operating parameter.                                                  

[FR Doc. 96-22781 Filed 9-11-96; 8:45 am]
BILLING CODE 6560-50-P/M