[Federal Register Volume 66, Number 163 (Wednesday, August 22, 2001)]
[Rules and Regulations]
[Pages 44053-44057]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 01-21150]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 52

[PA-4141a; FRL-7036-2]


Approval and Promulgation of Air Quality Implementation Plans; 
Pennsylvania; NOX RACT Determination for Armco Inc., Butler 
Operations Main Plant and Butler Operations Stainless Plant in the 
Pittsburgh-Beaver Valley Area

AGENCY: Environmental Protection Agency (EPA).

ACTION: Direct final rule.

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SUMMARY: EPA is taking direct final action to approve revisions to the 
Commonwealth of Pennsylvania's State Implementation Plan (SIP). The 
revisions were submitted by the Pennsylvania Department of 
Environmental Protection (PADEP) to establish and require reasonably 
available control technology (RACT) for Armco Inc., Butler Operations 
Main Plant and Butler Operations Stainless Plant, major sources of 
nitrogen oxides (NOX) located in the Pittsburgh-Beaver 
Valley ozone nonattainment area (the Pittsburgh area). EPA is approving 
these revisions to establish RACT requirements in the SIP in accordance 
with the Clean Air Act (CAA).

DATES: This rule is effective on October 9, 2001 without further 
notice, unless EPA receives adverse written comment by September 21, 
2001. If EPA receives such comments, it will publish a timely 
withdrawal of the direct final rule in the Federal Register and inform 
the public that the rule will not take effect.

ADDRESSES: Written comments should be mailed to David L. Arnold, Chief, 
Air Quality Planning & Information Services Branch, Air Protection 
Division, Mail code 3AP21, U.S. Environmental Protection Agency, Region 
III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. Copies of the 
documents relevant to this action are available for public inspection 
during normal business hours at the Air Protection Division, U.S. 
Environmental Protection Agency, Region III, 1650 Arch Street, 
Philadelphia, Pennsylvania 19103; the Air and Radiation Docket and 
Information Center, U.S. Environmental Protection Agency, 401 M Street, 
SW., Washington, DC 20460; and the Pennsylvania Department of 
Environmental Protection, Bureau of Air Quality Control, P.O. Box 8468, 
400 Market Street, Harrisburg, Pennsylvania 17105.

FOR FURTHER INFORMATION CONTACT: Michael Ioff at (215) 814-2166, the 
EPA Region III address above or by e-mail at [email protected]. Please 
note that while questions may be posed via telephone and e-mail, formal 
comments must be submitted, in writing, as indicated in the ADDRESSES 
section of this document.

SUPPLEMENTARY INFORMATION:

I. Background

    Pursuant to sections 182(b)(2) and 182(f) of the Clean Air Act 
(CAA), the Commonwealth of Pennsylvania (the Commonwealth or 
Pennsylvania) is required to establish and implement RACT for all major 
volatile organic compounds (VOC) and NOX sources. The major 
source size is determined by its location, the classification of that 
area and whether it is located in the ozone transport region (OTR). 
Under section 184 of the CAA, RACT as specified in sections 182(b)(2) 
and 182(f) applies throughout the OTR. The entire Commonwealth is 
located within the OTR. Therefore, RACT is applicable statewide in 
Pennsylvania.
    State implementation plan revisions imposing reasonably available 
control technology (RACT) for three classes of VOC sources are required 
under section 182(b)(2). The categories are: (1) All sources covered by 
a Control Technique Guideline (CTG) document issued between November 
15, 1990 and the date of attainment; (2) all sources covered by a CTG 
issued prior to November 15, 1990; (3) all other major non-CTG rules 
were due by November 15, 1992. The Pennsylvania SIP has approved RACT 
regulations and requirements for all sources and source categories 
covered by the CTG's.
    On February 4, 1994, the Pennsylvania Department of Environmental 
Protection (PADEP) submitted a revision to its SIP to require major 
sources of NOX and additional major sources of VOC emissions 
(not covered by a CTG) to implement RACT. The February 4, 1994 
submittal was amended on May 3, 1994 to correct and clarify certain 
presumptive NOX RACT requirements. In the Pittsburgh area, a 
major source of VOC is defined as one having the potential to emit 50 
tons per year (tpy) or more, and a major source of NOX is 
defined as one having the potential to emit 100 tpy or more. 
Pennsylvania's RACT regulations require sources, in the Pittsburgh 
area, that have the potential to emit 50 tpy or more of VOC and sources 
which have the potential to emit 100 tpy or more of NOX 
comply with RACT by May 31, 1995. The regulations contain technology-
based or operational ``presumptive RACT emission limitations'' for 
certain major NOX

[[Page 44054]]

sources. For other major NOX sources, and all major non-CTG 
VOC sources (not otherwise already subject to RACT under the 
Pennsylvania SIP), the regulations contain a ``generic'' RACT 
provision. A generic RACT regulation is one that does not, itself, 
specifically define RACT for a source or source categories but instead 
allows for case-by-case RACT determinations. The generic provisions of 
Pennsylvania's regulations allow for PADEP to make case-by-case RACT 
determinations that are then to be submitted to EPA as revisions to the 
Pennsylvania SIP.
    On March 23, 1998 EPA granted conditional limited approval to the 
Commonwealth's generic VOC and NOX RACT regulations (63 FR 
13789). In that action, EPA stated that the conditions of its approval 
would be satisfied once the Commonwealth either (1) certifies that it 
has submitted case-by-case RACT proposals for all sources subject to 
the RACT requirements currently known to PADEP; or (2) demonstrates 
that the emissions from any remaining subject sources represent a de 
minimis level of emissions as defined in the March 23, 1998 rulemaking. 
On April 22, 1999, PADEP made the required submittal to EPA certifying 
that it had met the terms and conditions imposed by EPA in its March 
23, 1998 conditional limited approval of its VOC and NOX 
RACT regulations by submitting 485 case-by-case VOC/NOX RACT 
determinations as SIP revisions and making the demonstration described 
as condition 2, above. EPA determined that Pennsylvania's April 22, 
1999 submittal satisfied the conditions imposed in its conditional 
limited approval published on March 23, 1998. On May 3, 2001 (66 FR 
22123), EPA published a rulemaking action removing the conditional 
status of its approval of the Commonwealth's generic VOC and 
NOX RACT regulations on a statewide basis. The regulation 
currently retains its limited approval status. Once EPA has approved 
the case-by-case RACT determinations submitted by PADEP to satisfy the 
conditional approval for subject sources located in Allegheny, 
Armstrong, Beaver, Butler, Fayette, Washington, and Westmoreland 
Counties; the limited approval of Pennsylvania's generic VOC and 
NOX RACT regulations shall convert to a full approval for 
the Pittsburgh area.
    On January 21, 1997, PADEP submitted revisions to the Pennsylvania 
SIP which establish and impose case-by-case RACT for several sources of 
VOC and/or NOX. This rulemaking pertains to two of those 
sources, the Armco Inc., Butler Operations Main Plant and the Armco 
Inc., Butler Operations Stainless Plant. Remaining sources are or have 
been the subject of separate rulemakings.

II. Summary of the SIP Revisions

A. Butler Operations Main Plant

    The Armco Inc., Butler Operations Main Plant is a producer of flat 
rolled stainless and silicon steel slabs, sheets, and coils located in 
Butler, Butler County, Pennsylvania. The facility is not a major VOC 
emitting source. The facility is a major source of NOX, and 
is subject to RACT. The facility's Melt Shop consists of three Electric 
Arc Furnaces (EAFs), an Argon-Oxygen Decarburization (AOD) vessel, a 
Vacuum Degasser, five Ladle Preheaters, two Continuous Casters, and 
various auxiliary equipment. Other installations and processes at the 
Main Plant include Hot Mill with slab conditioning, Cold Mill, and 
North/Silicon Processing units with the associated annealing and 
pickling lines as well as other process/auxiliary equipment. The 
facility also includes five boilers and a number of preheat/heating/
reheat/drying and annealing metallurgical furnaces and heaters. 
Pennsylvania established NOX RACT requirements for the 
facility in a RACT Plan Approval consisting of an operating permit, PA 
10-001-M.
(1) Description of the NOX Emitting Installations and 
Processes
    (a) EAFs at the Melt Shop: The EAFs are used at the facility to 
melt and refine the charge of metallic scrap, fluxes, and various 
alloying elements. The sufficient resistive heating is generated inside 
the refractory-lined furnace vessel by electrical current flowing 
between the three graphite electrodes and through the metallic charge. 
In spite of very high temperatures which arise inside the furnace 
during the melting phase, only modest NOX formation occurs. 
This is due to the fact that in the EAF process the generation of 
NOX is largely transferred from a steelmaking facility to an 
electric generating unit at a utility plant where those emissions are 
controlled.
    (b) AOD vessel at the Melt Shop: The AOD vessel is a refractory-
lined furnace used in the ladle metallurgical argon-oxygen 
decarburization process to refine stainless steel outside the EAF. 
During the oxygen-argon blowing, fluxes and alloy materials are added 
to the vessel. Immediately after the decarburization blow, molten steel 
is argon-stirred to achieve the desired chemical and temperature 
homogenization of the material. The AOD process primarily generates 
particulate emissions controlled by a baghouse. Waste gases from the 
process (consisting chiefly of carbon monoxide) are combusted in an 
open hood above the vessel's mouth producing a relatively small amount 
of NOX emissions.
     (c) Vacuum Degasser at the Melt Shop: The installation is used to 
expose molten steel to a low-pressure environment in order to remove 
gaseous impurities from the steel. In the process, a vessel with molten 
steel is closed and placed under a slight negative pressure while 
natural gas-fired burners are keeping the steel in the molten state for 
processing. Based on the small amount of natural gas used in this 
operation, the installation does not present a significant source of 
NOX emissions.
    (d) Continuous Caster at the Melt Shop: The Caster is used to form 
the molten steel (produced by the EAF and refined in the AOD/Vacuum 
Degasser) into a solid slab. In the process, molten steel is lifted in 
a ladle to the top of the casting machine where it poured into a 
tundish. From the tundish the molten steel flows in the water cooled 
mold where it formed into the shape of the slab. Modest NOX 
emissions are formed around the oxygen cutting torch at the exit of the 
Caster and during tundish maintenance associated with drying and 
preheating operations.
    (e) Slab Reheat Furnaces at the Hot Mill: The furnaces are used to 
heat the slabs at a uniform rate to the temperature suitable for hot 
working and to hold them at that temperature for a specified period of 
time to impart the desired metallurgical properties for further 
processing steps. All four furnaces are natural gas-fired units with 
burners mounted in the roof of each furnace. Each furnace has a natural 
draft exhaust stack, a combustion blower and equipped with adjustable 
automatic temperature controls.
    (f) Continuous Annealing Furnaces at various locations: Annealing 
furnaces are natural gas-fired units that are used to refine the steel 
grain structure, to relief stresses induced by hot or cold working, and 
to alter the mechanical properties of steel in order to improve its 
malleability. Heat treatment of stainless steels is conducted at a slow 
rate and relatively low temperatures to minimize thermal stresses and 
to avoid distortion and cracking. Annealing makes steel softer and more 
ductile by controlled heating and cooling.
    (g) Continuous Decarburization and Drying Furnaces at Silicon 
Processing unit: The decarburization furnaces are used to remove 
residual carbon from silicon (electrical) steel by heating steel in a 
controlled atmosphere inside the furnace. The drying furnaces are used 
to cure a Magnesium-Oxide coating applied to the steel surface in order 
to

[[Page 44055]]

produce a ``glass-like'' insulating layer which is required for the 
electrical applications of the product. The heat is supplied to the 
process furnaces by radiant tube heat exchangers where the burners are 
situated at the one end of the tube and the exhaust at the other end of 
the exchanger. Some of the furnaces are heated by electrical power as 
well as by natural gas.
    (h) Pickling Lines at various locations: Pickling is the process 
used to remove the superficial scale that is formed on the steel 
surface during hot rolling, annealing, and cold rolling operations. The 
pickle tubs on all of the processing lines are covered and each 
processing line is vented to its own packed bed water scrubber. Steel 
coils are uncoiled and welded together to form a continuous strip which 
travels through the pickle tubs (where various acids and water are 
continuously fed) followed by cold and hot rinse tanks. The overflow 
from the pickle tubs, the rinse tanks and the acid fume scrubbers are 
neutralized with lime at the facility's wastewater treatment plant.
(2) Description of the RACT Determinations
    The facility generates NOX emissions from forty-two 
installations/processes. Pennsylvania has determined that 14 combustion 
sources comprised of Ladle Preheaters and various metallurgical 
furnaces with rated heat inputs less than 20 MMBTU/hr are subject to 
SIP-approved presumptive RACT requirements set forth in 25 Pa. Code 
Section 129.93.(c)(1). Five of the other twenty-eight sources are 
natural gas-fired metallurgical furnaces and boilers with rated gross 
heat inputs less than 50 MMBTU/hr. Pennsylvania has determined that 
these sources are subject to SIP-approved presumptive RACT requirements 
set forth in 25 Pa. Code Section 129.93(b)(2). Pennsylvania has also 
determined that three Miscellaneous small combustion sources are 
subject to SIP-approved presumptive RACT requirements set forth in 25 
Pa. Code Section 129.93.(b)(3). The remaining twenty sources are 
comprised of the three EAFs, AOD vessel, Vacuum Degasser, Pickling 
Lines #2, #12, #4 and #23, five Slab Reheat Furnaces, two Annealing 
Furnaces, and four boilers. A case-by-case detailed RACT analysis was 
performed for those twenty installations/processes. Pennsylvania's 
determinations of NOX RACT requirements are based on the 
analysis of whether or not the evaluated control technologies were 
economically and technically feasible options in each particular 
application. The following is the summary of Pennsylvania's RACT 
determinations.
    (a) PA 10-001-M requires that the NOX emission limit for 
the inlet of the baghouse No. 3 serving the Melt Shop shall not exceed 
75 lb/hr. This baghouse controls emissions from the EAFs, Casters, 
argon stirring station, ladle preheaters, and miscellaneous combustion 
sources. The permit also requires monitoring of the specified 
NOX emission limit by implementing an annual stack testing 
program.
    (b) PA 10-001-M requires that the average NOX emission 
rate of pickle lines #2, #4, #12, #23 shall not exceed 1.0 lb/ton. The 
permit also requires monitoring of the specified NOX 
emission limit by implementing an annual stack testing program.
    (c) PA 10-001-M requires AOD vessel; Vacuum Degasser; #1-6 ladle 
preheaters; #2-3 Continuous Caster; #20 and #26 Carlite; #1, #6, #11, 
#19 Decarburization and Drying furnaces, and CRNO Dryer to comply with 
the requirements of 25 PA Code Section 129.93(c)(1). In addition, 
Pennsylvania requires the sources to be operated in accordance with 
good air pollution control practices.
    (d) PA 10-001-M requires annealing furnaces #2, #4, #7, and #12, 
CRNO furnace, and #19/20 Boiler to comply with the requirements of 25 
PA Code Section 129.93(b)(3). In addition, Pennsylvania requires the 
sources to be operated in accordance with good air pollution control 
practices.
    (e) PA 10-001-M limits annual fuel consumption for four Slab Reheat 
Furnaces and four boilers to a specified volume of natural gas 
expressed in thousand cubic feet per year for each installation.
    All annual limits must be met on a rolling monthly basis over every 
consecutive 12-month period. PA 10-001-M imposes requirements for 
conducting the annual stack test programs including notification of the 
test, pre-approval of the stack test procedures, the number of tests, 
their duration, and post-test reporting requirements.

B. Butler Operations Stainless Plant

    The Armco Inc., Butler Operations Stainless Plant is a processor of 
intermediate and final gauge 300 and 400 series stainless steel located 
in Butler, Butler County, Pennsylvania. The facility is not a major VOC 
emitting source. The facility is a major source of NOX and 
is subject to RACT. The facility consists of #22 Annealing Furnace, #22 
Pickling Line and #13/#14 Boiler. Pennsylvania established 
NOX RACT requirements for the facility in a RACT Plan 
Approval consisting of an operating permit, PA 10-001-S.
(1) Description of the NOX Emitting Installations and 
Processes
    The Butler Operations Stainless Plant is a finishing facility. The 
semi-finished products supplied by the Main Plant are annealed and 
pickled at the facility. The NOX emitting sources include 
#22 Annealing Furnace, #22 Pickling Line, and #13/#14 Boiler. The 
description of the NOX emitting installations and processes 
provided for the Main Plant, above, also describe those at Butler 
Operations Stainless Plant.
(2) Description of the RACT Determinations
    (a) #13/#14 Boiler: The installation has a rated heat input of 21 
MMBTU/hr. Pennsylvania has determined that this source is subject to 
the SIP-approved presumptive RACT emission limitations in 25 Pa. Code 
Section 129.93(b)(2).
    (b) #22 Annealing Furnace: The installation has a rated heat input 
of 68 MMBTU/hr. Pennsylvania determined that NOX RACT for 
the #22 Annealing Furnace is compliance with the SIP-approved 
requirements of 25 PA Code Section 129.93(b)(3) and operation/
maintenance of the furnace in accordance with good air pollution 
control practice.
    (c) #22 Pickling Line: Pennsylvania determined NOX RACT 
for the #22 Pickling Line to be improvements to the water-based 
scrubber technology which was already in place. To this end, PA 10-001-
S requires the facility to install/maintain the instrumentation to 
monitor water flow rates and scrubber pressure drops. In addition, 
Pennsylvania limits NOX emissions from the #22 Pickling Line 
to 1.6 lb/ton and requires monitoring of this NOX emission 
limit by implementing an annual stack testing program. PA 10-001-M 
imposes requirements for conducting the annual stack test programs 
including notification of the test, pre-approval of the stack test 
procedures, the number of tests, their duration, and post-test 
reporting requirements.

IV. Final Action

    EPA is approving PA 10-001-M and PA 10-001-S, issued by PADEP to 
the Armco Inc., Butler Operations Main Plant and Armco Inc., Butler 
Operations Stainless Plant, respectively, as revisions to the 
Pennsylvania SIP. The permits were submitted by PADEP to establish and 
impose NOX RACT for Armco Inc., Butler Operations Main and 
Stainless Plant, major sources located in the Pittsburgh area. EPA is 
publishing

[[Page 44056]]

this rule without prior proposal because the Agency views this as a 
noncontroversial amendment and anticipates no adverse comment. However, 
in the ``Proposed Rules'' section of today's Federal Register, EPA is 
publishing a separate document that will serve as the proposal to 
approve the SIP revision if adverse comments are filed. This rule will 
be effective on October 9, 2001 without further notice unless EPA 
receives adverse comment by September 21, 2001. If EPA receives adverse 
comment, EPA will publish a timely withdrawal in the Federal Register 
informing the public that the rule will not take effect. EPA will 
address all public comments in a subsequent final rule based on the 
proposed rule. EPA will not institute a second comment period on this 
action. Any parties interested in commenting must do so at this time. 
Please note that if adverse comment is received for a specific source 
or subset of sources covered by an amendment, section or paragraph of 
this rule, only that amendment, section, or paragraph for that source 
or subset of sources will be withdrawn.

V. Administrative Requirements

A. General Requirements

    Under Executive Order 12866 (58 FR 51735, October 4, 1993), this 
action is not a ``significant regulatory action'' and therefore is not 
subject to review by the Office of Management and Budget. For this 
reason, this action is also not subject to Executive Order 13211, 
``Actions Concerning Regulations That Significantly Affect Energy 
Supply, Distribution, or Use.'' See 66 FR 28355, May 22, 2001. This 
action merely approves state law as meeting Federal requirements and 
imposes no additional requirements beyond those imposed by state law. 
Accordingly, the Administrator certifies that this rule will not have a 
significant economic impact on a substantial number of small entities 
under the Regulatory Flexibility Act (5 U.S.C. 601 et seq.). Because 
this rule approves pre-existing requirements under state law and does 
not impose any additional enforceable duty beyond that required by 
state law, it does not contain any unfunded mandate or significantly or 
uniquely affect small governments, as described in the Unfunded 
Mandates Reform Act of 1995 (Public Law 104-4). This rule also does not 
have a substantial direct effect on one or more Indian tribes, on the 
relationship between the Federal Government and Indian tribes, or on 
the distribution of power and responsibilities between the Federal 
Government and Indian tribes, as specified by Executive Order 13175 (65 
FR 67249, November 9, 2000), nor will it have substantial direct 
effects on the States, on the relationship between the national 
government and the States, or on the distribution of power and 
responsibilities among the various levels of government, as specified 
in Executive Order 13132 (64 FR 43255, August 10, 1999), because it 
merely approves a state rule implementing a Federal standard, and does 
not alter the relationship or the distribution of power and 
responsibilities established in the Clean Air Act. This rule also is 
not subject to Executive Order 13045 (62 FR 19885, April 23, 1997), 
because it is not economically significant. In reviewing SIP 
submissions, EPA's role is to approve state choices, provided that they 
meet the criteria of the Clean Air Act. In this context, in the absence 
of a prior existing requirement for the State to use voluntary 
consensus standards (VCS), EPA has no authority to disapprove a SIP 
submission for failure to use VCS. It would thus be inconsistent with 
applicable law for EPA, when it reviews a SIP submission, to use VCS in 
place of a SIP submission that otherwise satisfies the provisions of 
the Clean Air Act. Thus, the requirements of section 12(d) of the 
National Technology Transfer and Advancement Act of 1995 (15 U.S.C. 272 
note) do not apply. As required by section 3 of Executive Order 12988 
(61 FR 4729, February 7, 1996), in issuing this rule, EPA has taken the 
necessary steps to eliminate drafting errors and ambiguity, minimize 
potential litigation, and provide a clear legal standard for affected 
conduct. EPA has complied with Executive Order 12630 (53 FR 8859, March 
15, 1988) by examining the takings implications of the rule in 
accordance with the ``Attorney General's Supplemental Guidelines for 
the Evaluation of Risk and Avoidance of Unanticipated Takings'' issued 
under the executive order. This rule does not impose an information 
collection burden under the provisions of the Paperwork Reduction Act 
of 1995 (44 U.S.C. 3501 et seq.).

B. Submission to Congress and the Comptroller General

    The Congressional Review Act, 5 U.S.C. 801 et seq., as added by the 
Small Business Regulatory Enforcement Fairness Act of 1996, generally 
provides that before a rule may take effect, the agency promulgating 
the rule must submit a rule report, which includes a copy of the rule, 
to each House of the Congress and to the Comptroller General of the 
United States. Section 804 exempts from section 801 the following types 
of rules: (1) Rules of particular applicability; (2) rules relating to 
agency management or personnel; and (3) rules of agency organization, 
procedure, or practice that do not substantially affect the rights or 
obligations of non-agency parties. 5 U.S.C. 804(3). EPA is not required 
to submit a rule report regarding today's action under section 801 
because this is a rule of particular applicability establishing source-
specific requirements for two named sources.

C. Petitions for Judicial Review

    Under section 307(b)(1) of the Clean Air Act, petitions for 
judicial review of this action must be filed in the United States Court 
of Appeals for the appropriate circuit by October 22, 2001. Filing a 
petition for reconsideration by the Administrator of this final rule 
does not affect the finality of this rule for the purposes of judicial 
review nor does it extend the time within which a petition for judicial 
review may be filed, and shall not postpone the effectiveness of such 
rule or action. This action approving the Commonwealth's source-
specific RACT requirements to control NOX from the Armco 
Inc., Butler Operations Main Plant and Armco Inc., Butler Operations 
Stainless Plant may not be challenged later in proceedings to enforce 
its requirements. (See section 307(b)(2).)

List of Subjects in 40 CFR Part 52

    Environmental protection, Air pollution control, Incorporation by 
reference, Nitrogen Oxides, Ozone, Reporting and recordkeeping 
requirements.

    Dated: August 8, 2001.
Thomas C. Voltaggio,
Deputy Regional Administrator, Region III.


    40 CFR part 52 is amended as follows:

PART 52--[AMENDED]

    1. The authority citation for Part 52 continues to read as follows:

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

Subpart NN--Pennsylvania

    2. Section 52.2020 is amended by adding paragraph (c)(175) to read 
as follows:


Sec. 52.2020  Identification of plan.

* * * * *
    (c) * * *
    (175) Revisions pertaining to NOX RACT determinations 
for the Armco Inc., Butler Operations Main Plant and Armco Inc., Butler 
Operations Stainless Plant, submitted by the Pennsylvania

[[Page 44057]]

Department of Environmental Protection on January 21, 1997.
    (i) Incorporation by reference.
    (A) Letter submitted on January 21, 1997 by the Pennsylvania 
Department of Environmental Protection transmitting source-specific VOC 
and/or NOX RACT plan approvals in the form of permits.
    (B) Permit Number: PA 10-001-M, effective February 23, 1996, for 
the Armco Inc., Butler Operations Main Plant in Butler, Butler County.
    (C) Permit Number: PA 10-001-S, effective February 23, 1996, for 
the Armco Inc., Butler Operations Stainless Plant in Butler, Butler 
County.
    (ii) Additional Materials--Other materials submitted by the 
Commonwealth of Pennsylvania in support of and pertaining to the RACT 
determination for the sources listed in (i)(B) and (C), above.

[FR Doc. 01-21150 Filed 8-21-01; 8:45 am]
BILLING CODE 6560-50-P