[Federal Register Volume 87, Number 198 (Friday, October 14, 2022)]
[Proposed Rules]
[Pages 62322-62337]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2022-22259]


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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Parts 51 and 52

[EPA-HQ-OAR-2004-0014; FRL-4940.2-03-OAR]
RIN 2060-AQ47


Prevention of Significant Deterioration (PSD) and Nonattainment 
New Source Review (NNSR): Reconsideration of Fugitive Emissions Rule

AGENCY: Environmental Protection Agency (EPA).

ACTION: Proposed rule.

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SUMMARY: The Environmental Protection Agency (EPA) is proposing to 
repeal regulatory amendments promulgated through a final rule adopted 
in 2008 under the Clean Air Act (CAA or Act) that addressed the 
consideration of ``fugitive'' emissions of air pollutants from 
stationary sources when determining the applicability of certain 
permitting requirements under the Act. Those amendments have been 
stayed as a result of the reconsideration process. To bring closure to 
the reconsideration proceeding, the EPA is proposing to fully repeal 
the 2008 rule by removing

[[Page 62323]]

the stayed provisions of the regulatory amendments adopted in 2008. The 
EPA is also proposing to remove a related exemption for modifications 
that would be considered major solely due to the inclusion of fugitive 
emissions. As a result of the proposed changes, all existing major 
stationary sources would be required to include fugitive emissions in 
determining whether a physical or operational change constitutes a 
``major modification,'' requiring a permit under the Prevention of 
Significant Deterioration (PSD) or Nonattainment New Source Review 
(NNSR) programs.

DATES: 
    Comments: Comments must be received on or before December 13, 2022.
    Public hearing: If anyone contacts EPA requesting a public hearing 
by October 19, 2022, the EPA will hold a virtual public hearing. See 
SUPPLEMENTARY INFORMATION for information on requesting and registering 
for a public hearing.

ADDRESSES: 
    Comments: You may send comments, identified by Docket ID No. EPA-
HQ-OAR-2004-0014, by any of the following methods:
     Federal eRulemaking Portal: https://www.regulations.gov/ 
(our preferred method). Follow the online instructions for submitting 
comments.
     Email: [email protected]. Include Docket ID No. EPA-
HQ-OAR-2004-0014 in the subject line of the message.
     Fax: (202) 566-9744. Attention Docket ID No. EPA-HQ-OAR-
2004-0014.
    Instructions: All submissions received must include the Docket ID 
No. EPA-HQ-OAR-2004-0014 for this rulemaking. Comments received may be 
posted without change to https://www.regulations.gov/, including any 
personal information provided. For detailed instructions on sending 
comments and additional information on the rulemaking process, see the 
SUPPLEMENTARY INFORMATION section of this document. For further 
information on EPA Docket Center services and the current status, 
please visit us online at https://www.epa.gov/dockets.

FOR FURTHER INFORMATION CONTACT: For information about this proposed 
rule, contact Mr. Matthew Spangler, Air Quality Policy Division, Office 
of Air Quality Planning and Standards (C504-05), Environmental 
Protection Agency, Research Triangle Park, NC; telephone number: (919) 
541-0327; email address: [email protected].

SUPPLEMENTARY INFORMATION: The information presented in this document 
is organized as follows:

I. General Information
    A. Entities Potentially Affected by This Action
    B. Obtaining a Copy of This Document and Other Related 
Information
    C. Preparing Comments for the EPA
    D. Participation in Virtual Public Hearing
II. Background
    A. New Source Review Program
    B. Applicability of the Major NSR Program
    C. Treatment of ``Fugitive Emissions'' in the Major NSR Program
    D. Fugitive Emissions in Major Modification Determinations
    E. Petition for Reconsideration and Administrative Stays of the 
Fugitive Emissions Rule
III. Proposed Action
    A. Results of the EPA's Reconsideration
    B. Proposed Revisions to Regulations
IV. Interpretation of CAA Sections 302(j) and 111(a)(4)
    A. Previous EPA Interpretations
    B. NRDC's Petition for Reconsideration
    C. Proposed Interpretation of CAA Sections 302(j) and 111(a)(4)
V. Policy Considerations and Impact on Regulated Entities
    A. Purposes of NSR
    B. Increasing Clarity
    C. Previous Policy Considerations
    D. Impacts on Regulated Entities
VI. SIP Minimum Program Elements
VII. Definition of ``Fugitive Emissions''
VIII. Environmental Justice Considerations
IX. Statutory and Executive Order Reviews
    A. Executive Order 12866: Regulatory Planning and Review and 
Executive Order 13563: Improving Regulation and Regulatory Review
    B. Paperwork Reduction Act (PRA)
    C. Regulatory Flexibility Act (RFA)
    D. Unfunded Mandates Reform Act (UMRA)
    E. Executive Order 13132: Federalism
    F. Executive Order 13175: Consultation and Coordination With 
Indian Tribal Governments
    G. Executive Order 13045: Protection of Children From 
Environmental Health and Safety Risks
    H. Executive Order 13211: Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use
    I. National Technology Transfer and Advancement Act (NTTA)
    J. Executive Order 12898: Federal Actions To Address 
Environmental Justice in Minority Populations and Low-Income 
Populations
X. Statutory Authority

I. General Information

A. Entities Potentially Affected by This Action

    Entities potentially affected by this action include sources that 
do not belong to a source category listed in 40 Code of Federal 
Regulations (CFR) 52.21(b)(1)(iii) (and other identical provisions in 
other sections of the CFR). Entities potentially affected by this 
proposed action also include state and local air pollution control 
agencies responsible for permitting sources pursuant to the New Source 
Review (NSR) program.

B. Obtaining a Copy of This Document and Other Related Information

    The EPA has established a docket for this rulemaking under Docket 
ID No. EPA-HQ-OAR-2004-0014. All documents in the dockets are listed in 
https://www.regulations.gov/. Although listed, some information is not 
publicly available, e.g., Confidential Business Information (CBI) or 
other information whose disclosure is restricted by statute. Certain 
other material, such as copyrighted material, is not placed on the 
internet and will be publicly available only in hard copy. Publicly 
available docket materials are available either in the docket for this 
action, Docket ID No. EPA-HQ-OAR-2004-0014, or electronically at 
https://www.regulations.gov/.
    In addition to being available in the docket, an electronic copy of 
this Federal Register document will be posted at https://www.epa.gov/nsr.

C. Preparing Comments for the EPA

    Instructions. Submit your comments, identified by Docket ID No. 
EPA-HQ-OAR-2004-0014, at https://www.regulations.gov (our preferred 
method), or the other methods identified in the ADDRESSES section. Once 
submitted, comments cannot be edited or removed from the docket. The 
EPA may publish any comment received to its public docket. Do not 
submit to EPA's docket at https://www.regulations.gov any information 
you consider to be CBI or other information whose disclosure is 
restricted by statute. This type of information should be submitted by 
mail as discussed below.
    Multimedia submissions (audio, video, etc.) must be accompanied by 
a written comment. The written comment is considered the official 
comment and should include discussion of all points you wish to make. 
The EPA will generally not consider comments or comment contents 
located outside of the primary submission (i.e., on the web, cloud, or 
other file sharing system). For additional submission methods, the full 
EPA public comment policy, information about CBI or multimedia 
submissions, and general guidance on making effective comments, please 
visit https://www.epa.gov/dockets/commenting-epa-dockets. For further 
information and updates on EPA Docket

[[Page 62324]]

Center services, please visit us online at https://www.epa.gov/dockets.
    Submitting CBI. Do not submit information containing CBI to the EPA 
through https://www.regulations.gov/ or email. Clearly mark the part or 
all the information that you claim to be CBI. For CBI information on 
any digital storage media that you mail to the EPA, mark the outside of 
the digital storage media as CBI and then identify electronically 
within the digital storage media the specific information that is 
claimed as CBI. In addition to one complete version of the comments 
that includes information claimed as CBI, you must submit a copy of the 
comments that does not contain the information claimed as CBI directly 
to the public docket through the procedures outlined in Instructions 
above. If you submit any digital storage media that does not contain 
CBI, mark the outside of the digital storage media clearly that it does 
not contain CBI. Information not marked as CBI will be included in the 
public docket and the EPA's electronic public docket without prior 
notice. Information marked as CBI will not be disclosed except in 
accordance with procedures set forth in 40 CFR part 2. Send or deliver 
information identified as CBI only to the following address: OAQPS 
Document Control Officer (C404-02), OAQPS, U.S. Environmental 
Protection Agency, Research Triangle Park, North Carolina 27711, 
Attention Docket ID No. EPA-HQ-OAR-2004-0014. Note that written 
comments containing CBI and submitted by mail may be delayed and no 
hand deliveries will be accepted.

D. Participation in Virtual Public Hearing

    To request a virtual public hearing, contact Ms. Pamela Long at 
(919) 541-0641 or by email at [email protected]. If requested, the 
virtual hearing will be held on October 31, 2022. The hearing will 
convene at 9:00 a.m. Eastern Time (ET) and will conclude at 3:00 p.m. 
ET. The EPA may close a session 15 minutes after the last pre-
registered speaker has testified if there are no additional speakers. 
The EPA will announce further details at https://www.epa.gov/nsr.
    Upon publication of this document in the Federal Register, the EPA 
will begin pre-registering speakers for the hearing, if a hearing is 
requested. To register to speak at the virtual hearing, please use the 
online registration form available at https://www.epa.gov/nsr or 
contact Ms. Pamela Long at (919) 541-0641 or by email at 
[email protected]. The last day to pre-register to speak at the hearing 
will be October 26, 2022. Prior to the hearing, the EPA will post a 
general agenda that will list pre-registered speakers in approximate 
order at: https://www.epa.gov/nsr.
    The EPA will make every effort to follow the schedule as closely as 
possible on the day of the hearing; however, please plan for the 
hearings to run either ahead of schedule or behind schedule.
    Each commenter will have 3 minutes to provide oral testimony. The 
EPA encourages commenters to provide the EPA with a copy of their oral 
testimony electronically (via email) by emailing it to 
[email protected]. The EPA also recommends submitting the text of your 
oral testimony as written comments to the rulemaking docket.
    The EPA may ask clarifying questions during the oral presentations 
but will not respond to the presentations at that time. Written 
statements and supporting information submitted during the comment 
period will be considered with the same weight as oral testimony and 
supporting information presented at the public hearing.
    Please note that any updates made to any aspect of the hearing will 
be posted online at https://www.epa.gov/nsr. While the EPA expects the 
hearing to go forward as set forth above, please monitor our website or 
contact Ms. Pamela Long at (919) 541-0641 or by email at 
[email protected] to determine if there are any updates. The EPA does 
not intend to publish a document in the Federal Register announcing 
updates.
    If you require the services of a translator or special 
accommodations such as audio description, please pre-register for the 
hearing with Ms. Pamela Long and describe your needs by October 21, 
2022. The EPA may not be able to arrange accommodations without 
advanced notice.

II. Background

A. New Source Review Program

    The NSR program was designed to protect public health and welfare 
from the effects of air pollution and to preserve and/or improve air 
quality throughout the nation. See 42 U.S.C. 7470(1), (2), (4). The NSR 
program requires certain stationary sources of air pollution to obtain 
air pollution permits prior to beginning construction. Construction of 
new sources with emissions above statutory thresholds, and 
modifications of existing sources emitting above those thresholds, that 
increase emissions of ``regulated NSR pollutants'' by more than amounts 
specified in the EPA's NSR regulations are subject to ``major source'' 
NSR requirements. New construction or modifications of smaller emitting 
sources and modifications of existing major sources that do not 
increase emissions by more than the thresholds in the major NSR 
regulations may be subject to minor NSR requirements or excluded from 
NSR altogether.
    The major source NSR program includes two distinct programs that 
each have unique requirements for new or modified sources. The 
applicability of these two programs depends on whether the area where 
the source is located is exceeding the National Ambient Air Quality 
Standards (NAAQS). The PSD program, based on requirements in Part C of 
title I of the CAA, applies to pollutants for which the area is not 
exceeding the NAAQS (areas designated as attainment or unclassifiable) 
and to regulated NSR pollutants for which there are no NAAQS. The NNSR 
program, based on Part D of title I of the CAA, applies to pollutants 
for which the area is not meeting the NAAQS (areas designated as 
nonattainment).
    To implement the requirements of the CAA for these programs, most 
states have EPA-approved State Implementation Plans (SIPs) containing 
PSD and NNSR preconstruction permitting programs that meet the minimum 
requirements reflected in the EPA's major NSR program regulations at 40 
CFR 51.166 and 51.165. Upon EPA approval of a SIP, the state or local 
air agency becomes the permitting authority for major NSR permits for 
sources within its boundaries and issues permits under state law. 
Currently, state and local air agencies issue the vast majority of 
major NSR permits each year. When a state or local air agency does not 
have an approved NSR program, federal regulations apply and either the 
EPA issues the major NSR permits or a state or local air agency issues 
the major NSR permits on behalf of the EPA by way of a delegation 
agreement. For sources located in Indian Country, 18 U.S.C. 1151, the 
EPA is the permitting authority for major NSR.
    The permitting program for construction of new non-major sources 
and minor modifications to major sources is known as the minor NSR 
program. CAA section 110(a)(2)(C) requires states to develop a program 
to regulate the construction and modification of any stationary source 
``as necessary to assure that [NAAQS] are achieved.'' 42 U.S.C. 
7410(a)(2)(C). The CAA and the EPA's regulations are less prescriptive 
regarding minimum requirements for minor NSR, so air agencies generally 
have more flexibility in designing minor NSR programs in their EPA-
approved SIPs. Minor NSR

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permits are almost exclusively issued by state and local air agencies, 
although the EPA issues minor NSR permits in many areas of Indian 
Country.
    The applicability of the PSD, NNSR, and/or minor NSR programs to a 
stationary source must be determined in advance of construction and is 
a pollutant-specific determination. Thus, a stationary source may be 
subject to the PSD program for certain pollutants, NNSR for some 
pollutants, and minor NSR for others.

B. Applicability of the Major NSR Program

    Major NSR applies to (1) construction of new major sources and (2) 
major modifications of existing major sources. In either case, the 
initial step in assessing applicability is to determine whether the new 
or modified source in question qualifies as a ``major stationary 
source.'' A new or existing source qualifies as a major stationary 
source if it ``emits or has the potential to emit'' a regulated NSR 
pollutant in an amount greater than the specified annual thresholds. 
For the PSD program, the major source threshold is 100 tons per year 
(tpy) for sources in certain source categories listed in the 
regulations, and 250 tpy for any other type of source. See 40 CFR 
51.166(b)(1)(i)(a) and 52.21(b)(1)(i)(a). The major source threshold 
for NNSR is generally 100 tpy for all source categories but is lower 
for some pollutants in nonattainment areas classified as Serious, 
Severe, or Extreme. See 40 CFR 51.165(a)(1)(iv).
    If a proposed new source's actual or potential emissions of a 
regulated NSR pollutant \1\ are at or above the applicable major source 
threshold, it is subject to preconstruction review under major NSR for 
that pollutant.\2\ Furthermore, under PSD, the proposed new source 
would also be subject to major NSR review for any other regulated NSR 
pollutant that it emits at or above the pollutant's ``significant'' 
emissions rate as defined in 40 CFR 51.166(b)(23) and 52.21(b)(23).
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    \1\ 40 CFR 52.21(b)(50) defines the term ``regulated NSR 
pollutant'' for purposes of PSD. The term generally includes 
pollutants for which a NAAQS has been promulgated and other 
pollutants subject to regulation under the CAA. This ``regulated NSR 
pollutant'' definition, however, excludes the Hazardous Air 
Pollutants regulated under section 112 of the CAA. For purposes of 
NNSR, ``regulated NSR pollutant'' is defined at 40 CFR 
51.165(a)(1)(xxxvii).
    \2\ Physical changes at an existing non-major source can also 
establish a ``major stationary source'' if the physical change by 
itself would exceed the applicable major stationary source 
threshold. E.g., 40 CFR 52.21(b)(1)(i)(c).
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    An existing major stationary source can be subject to major NSR 
when a proposed physical change or a change in the method of operation 
qualifies as a ``major modification.'' \3\ A major modification occurs 
when a physical or operational change (i.e., a construction project) 
would result in (1) a significant emissions increase of a regulated NSR 
pollutant, considering emissions increases and decreases from the 
project alone, and (2) a significant net emissions increase of a 
regulated NSR pollutant, considering the project as well as other 
contemporaneous emissions increases and decreases at the source. See, 
e.g., 40 CFR 52.21(b)(2)(i) and (b)(52). As noted in the previous 
paragraph, the NSR regulations define the annual emissions rate 
considered ``significant'' for each regulated NSR pollutant. See 40 CFR 
51.165(a)(1)(x), 51.166(b)(23), and 52.21(b)(23). In determining the 
increase in emissions from a physical or operational change, new 
emissions units are evaluated at their potential emissions, while 
existing and replacement units are generally evaluated by comparing 
their baseline actual emissions before the physical or operational 
change to their projected actual emissions after the change. See, e.g., 
40 CFR 52.21(a)(2)(iv)(c-f), (b)(7), and (b)(33).
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    \3\ Notably, modifications to existing non-major sources cannot 
be considered major modifications. However, as described in footnote 
2, a physical change at an existing minor source that itself exceeds 
the major source thresholds would establish a major stationary 
source.
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C. Treatment of ``Fugitive Emissions'' in the Major NSR Program

    For purposes of major NSR, ``fugitive emissions'' are defined as 
``emissions which could not reasonably pass through a stack, chimney, 
vent, or other functionally equivalent opening.'' E.g., 40 CFR 
52.21(b)(20). Examples of fugitive emissions include windblown dust 
from surface mines and volatile organic compounds (VOCs) emitted from 
leaking pipes and fittings at petroleum refineries. Section VII of this 
preamble further discusses the definition of ``fugitive emissions.''
    For certain types of sources, fugitive emissions are treated 
differently from non-fugitive emissions in determining whether major 
NSR applies to a source. Fugitive emissions may be relevant to 
determining whether a source triggers major NSR in two distinct 
contexts.
    First, for purposes of determining whether a new or existing source 
is a ``major stationary source,'' \4\ quantifiable fugitive emissions 
are included in calculating a source's emissions only if the source 
belongs to one of the source categories specifically listed in the 
major NSR regulations. See, e.g., 40 CFR 52.21(b)(1)(iii).\5\ Thus, 
fugitive emissions from sources not belonging to a listed category are 
generally not included in determining whether a source is a major 
stationary source. The treatment of fugitive emissions in determining 
whether a new or existing source is a major source is well-established 
and is not impacted by this proposed action.
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    \4\ The relevant statutory provisions use the terms ``major 
stationary source'' and ``major emitting facility'' interchangeably. 
See 42 U.S.C. 7479(1), 7602(j). The EPA uses the shorthand phrase 
``major source'' to refer to this concept, and any reference to a 
``major source'' in this preamble refers to the concept of ``major 
stationary source'' under NSR.
    \5\ A single stationary source may be comprised of multiple 
different pollutant-emitting activities. See, e.g., 40 CFR 
52.21(b)(5) and (6) (requiring the aggregation of all pollutant-
emitting activities that belong to the same major industrial 
grouping, are located on one or more contiguous or adjacent 
properties, and are under the control of the same person (or persons 
under common control)). Although these activities might be assigned 
different source categories if viewed in isolation, EPA's 
longstanding approach is to examine the source as a whole and assign 
it to a single source category based on its ``primary activity.'' 
See, e.g., 54 FR 48870, 48881 (November 28, 1989). Under this 
approach, if the source's primary activity is determined to be one 
of the listed source categories, then fugitive emissions from all 
pollutant-emitting activities that are part of that stationary 
source are considered in determining whether the source as a whole 
exceeds the relevant major source threshold. See, e.g., 54 FR 48882; 
Letter from Cheryl Newton, EPA Region 5, to Janet McCabe, Indiana 
Department of Environmental Management (March 6, 2003) (Newton 
Letter). Even if the primary activity of a source does not fit 
within a listed source category, fugitive emissions should be 
quantified from emission units within the source that do belong to a 
listed category (e.g., a boiler of sufficient size, or a coal 
cleaning plant); this is sometimes referred to as a ``nested'' or 
``embedded'' source. See, e.g., Newton Letter. In this case, 
fugitive emissions from the ``nested'' portion of the source 
belonging to a listed source category would be included in 
determining whether (1) the ``nested'' portion of the source 
exceeded the relevant major source threshold (generally 100 tons per 
year), and whether (2) the source as a whole exceeded the relevant 
major source threshold (generally 250 tons per year for PSD).
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    Second, the inclusion of fugitive emissions may impact whether a 
physical or operational change at a major stationary source results in 
a ``major modification.'' This proposed action addresses the treatment 
of fugitive emissions in this second context. As discussed further in 
Sections III and IV of this preamble, the EPA proposes to affirm its 
longstanding position that all existing major sources (regardless of 
source category) must include fugitive emissions when determining if a 
modification is major. A summary of the relevant history of the 
treatment of fugitive emissions in the context of modifications is 
presented in Section II.D of this preamble; additional discussion of 
the legal and policy considerations underlying this history is included 
in Section IV.A of this preamble.

[[Page 62326]]

    Once a source is subject to the major NSR program, fugitive 
emissions are generally treated the same as stack emissions in 
determining which substantive requirements apply to the source.\6\ 
Specifically, for PSD, once a new source is determined to be ``major'' 
(i.e., over the 100 or 250 tpy threshold) for a particular pollutant, 
all emissions (including fugitive emissions) are included in all 
subsequent analysis, including PSD applicability for other individual 
pollutants (i.e., comparing emissions to the significant emission 
rates), Best Available Control Technology (BACT) analyses, and air 
quality impact analyses. E.g., 40 CFR 52.21(j)(2); see also 54 FR 48871 
n.2. Similarly, once a modification is determined to be major with 
respect to at least one regulated NSR pollutant (and provided an 
exemption discussed in Section II.D of this preamble does not apply), 
fugitive emissions are included in all subsequent analyses. E.g., 40 
CFR 52.21(j)(3); see also 54 FR 48871 n.2; In re Masonite Corp., 5 EAD 
551, 582-83 (EAB 1994).
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    \6\ See generally Alabama Power v. Costle, 636 F.2d 323, 369 
(D.C. Cir. 1979) (``The terms of section 165, which detail the 
preconstruction review and permit requirements for each new or 
modified `major emitting facility' apply with equal force to 
fugitive emissions and emissions from industrial point sources . . . 
. EPA is correct that a major emitting facility is subject to the 
requirements of section 165 for each pollutant it emits irrespective 
of the manner in which it is emitted.'').
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D. Fugitive Emissions in Major Modification Determinations

    Following the 1977 CAA Amendments, the EPA's initial 1978 
regulations implementing the major NSR program required that fugitive 
emissions from sources in all source categories be included in the 
first instance in calculating whether a new source or modification of 
an existing source was major.\7\ However, in its 1979 Alabama Power 
decision that reviewed the 1978 regulations,\8\ the D.C. Circuit held 
that CAA section 302(j) requires a rulemaking to identify the sources 
that must include fugitive emissions in determining whether a source is 
a ``major emitting facility'' (i.e., ``major stationary source''). In 
response, in 1980 the EPA promulgated a list of source categories, 
along with a provision exempting sources not belonging to one of those 
listed source categories from substantive major NSR requirements if the 
source or modification would be considered ``major'' solely due to the 
inclusion of fugitive emissions. 45 FR 52676 (August 7, 1980) 
(promulgating, e.g., 40 CFR 52.21(i)(4)(vii), which was later 
recodified at 40 CFR 52.21(i)(1)(vii) in 2002).\9\
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    \7\ See, e.g., 43 FR 26380, 26403-04 (June 19, 1978); see also 
48 FR 38742, 38743 (August 25, 1983) (discussing history of the 
EPA's treatment of fugitive emissions in the 1978 rule and related 
rules); 49 FR 43202 (October 26, 1984) (same). These initial 
regulations excluded ``fugitive dust'' from air quality impact 
assessments, but this exclusion was vacated by the D.C. Circuit 
court. See Alabama Power, 636 F.2d at 370.
    \8\ Alabama Power, 636 F.2d 323.
    \9\ The 1980 rule also added this exemption to EPA's NSR 
regulations in 40 CFR 51.18 (later recodified in 40 CFR 51.165), 40 
CFR 51.24 (later recodified in 40 CFR 51.166), and 40 CFR part 51 
appendix S. Collectively, these four nearly identical provisions are 
referred to as the ``1980 exemption.'' For an illustration of how 
the 1980 exemption has functioned in the major modification context, 
see In re Masonite Corp., 5 EAD 551, 581-83 (EAB 1994).
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    In 1984, the EPA finalized revisions to the NSR regulations that 
were intended to better implement CAA section 302(j), the statutory 
provision on which the 1980 exemption was based. In the context of 
major source determinations, the EPA revised the definition of ``major 
source'' such that sources in non-listed source categories need not 
include fugitive emissions in the first instance in determining whether 
their emissions exceed major source thresholds. 49 FR 43202 (October 
26, 1984). This reflected a more straightforward approach for major 
source determinations than the one established in the 1980 
exemption.\10\
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    \10\ Under the 1980 exemption, all sources were still required 
to include fugitive emissions in the first instance when calculating 
whether a new source or modification would be major. As a result, a 
non-listed source or modification could theoretically be classified 
as a major source but nonetheless exempt from substantive major NSR 
requirements if the terms of the exemption were met. In 1981, the 
EPA granted a petition for reconsideration of this aspect of the 
1980 rules and clarified that the regulations were not intended to 
function this way. Instead, the intent was that any source in a non-
listed category that would be ``major'' only if fugitive emissions 
were taken into account should not be considered ``major.'' See 
Letter from Douglas M. Costle, Administrator, EPA, to Robert T. 
Connery (January 19, 1981). The EPA's 1984 amendments to the ``major 
source'' definition codified this intent by excluding fugitive 
emissions from the major source calculation in the first instance. 
See 49 FR 43202 at 43204 and 43208-09 (October 26, 1984).
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    The EPA declined at that time to finalize a similar revision for 
major modifications. Instead, in a companion document to the 1984 final 
rule, the EPA proposed an ``interpretive ruling'' reevaluating and 
reversing the EPA's prior assumption that fugitive emissions should be 
treated the same in major source and major modification contexts. 49 FR 
43211 (October 26, 1984). For major modification determinations, the 
EPA proposed to include quantifiable fugitive emissions from sources in 
all source categories when determining whether a physical or 
operational change meets the significance thresholds for a major 
modification. This was based on the EPA's interpretation that CAA 
section 302(j) does not apply in the major modification context, and 
that CAA section 111(a)(4), which defines ``modification,'' requires 
consideration of all types of emissions (as discussed further in 
Section IV.A of this preamble). Along with this interpretation, the EPA 
proposed to remove the 1980 exemption, which was no longer needed in 
the major source context after the 1984 revisions and which conflicted 
with the agency's proposed interpretation in the major modification 
context. In 1986, the EPA again solicited comment on the 1984 
``interpretive ruling.'' 51 FR 7090 (February 28, 1986).
    The EPA ultimately ``retain[ed]'' and ``reaffirm[ed]'' the EPA's 
1984 interpretive ruling in a 1989 action finalizing certain other rule 
revisions. 54 FR 48870 (November 28, 1989).\11\ This interpretation--
that all sources must include fugitive emissions in the major 
modification context--remained the EPA's position until 2008.\12\ The 
EPA inadvertently failed to remove the 1980 exemption in the 1989 rule, 
creating an apparent conflict between the EPA's interpretation and the 
legacy regulatory text.
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    \11\ Subsequent EPA rules have referred to this 1989 rule as 
``finalizing'' the EPA's 1984 interpretive ruling. E.g., 73 FR 77884 
(December 19, 2008).
    \12\ In October 1990, the EPA released a draft New Source Review 
Workshop Manual, in which the agency stated that fugitive emissions 
``are included in the potential to emit (and increases in the same 
due to modification)'' if they occur at one of the source categories 
listed pursuant to section 302(j). DRAFT NSR Workshop Manual at A.9 
(1990). This phrasing seemingly contradicted the 1989 interpretive 
ruling, although the EPA later acknowledged that this language was 
not intended to change the EPA's policy in this area. 73 FR 77885 
(December 19, 2008). A 1994 EPA Environmental Appeals Board 
decision, In re. Masonite Corp., considered the existing regulatory 
text addressing the treatment of fugitive emissions in major 
modification determinations but did not evaluate or disturb the 1989 
interpretation. See 5 EAD at 581-83.
---------------------------------------------------------------------------

    In 2002, the EPA finalized major revisions to its NSR regulations. 
67 FR 80186 (December 31, 2002) (``NSR Reform Rule''). Among many other 
changes, and consistent with the 1989 interpretive ruling, this 2002 
rule explicitly required the inclusion of fugitive emissions in 
calculating emissions increases for purposes of determining whether a 
physical or operational change constitutes a major modification for all 
major sources, regardless of source category.\13\

[[Page 62327]]

Notwithstanding this affirmation and codification of the agency's 
longstanding position, the EPA again inadvertently left the 1980 
exemption in the CFR.\14\
---------------------------------------------------------------------------

    \13\ See, e.g., 40 CFR 52.21(b)(41)(ii)(b) and 
52.21(b)(48)(i)(a) (definitions of ``projected actual emissions'' 
and ``baseline actual emissions,'' both of which include fugitive 
emissions to the extent quantifiable).
    \14\ Although the 1980 exemption was renumbered from 40 CFR 
52.21(i)(4)(vii) to 40 CFR 52.21(i)(1)(vii) in the 2002 NSR Reform 
Rule, its content was not altered. As a result, the 1980 exemption--
which speaks in terms of calculating potential emissions increases--
does not align with the other changes effectuated in the 2002 rule, 
which focus on calculating or projecting actual emissions increases 
in determining whether a project is a major modification.
---------------------------------------------------------------------------

    In 2003, the EPA received a petition from Newmont USA Ltd., dba 
Newmont Mining Corporation, requesting that the EPA reconsider the 
treatment of fugitive emissions in the provisions adopted in the 2002 
NSR Reform Rule.\15\ After granting the petition for reconsideration in 
2004,\16\ the EPA proposed in 2007 and finalized in 2008 a rule titled 
``Prevention of Significant Deterioration (PSD) and Nonattainment New 
Source Review (NSR): Reconsideration of Inclusion of Fugitive 
Emissions'' (the Fugitive Emissions Rule). 72 FR 63850 (November 13, 
2007); 73 FR 77882 (December 19, 2008). The Fugitive Emissions Rule, 
which became effective on January 20, 2009, reversed the EPA's position 
as set forth in the 1984 and 1989 interpretive rulings concerning the 
treatment of fugitive emissions for major modification purposes. Under 
the Fugitive Emissions Rule, only sources in listed source categories 
designated through rulemaking pursuant to section 302(j) of the Act 
needed to include fugitive emissions in determining whether a change is 
a major modification. Thus, the Fugitive Emissions Rule adopted the 
same approach for considering fugitive emissions when determining 
whether a change is a major modification as has been used since 1984 
for determining whether a source is a major stationary source. Because 
the 2008 Fugitive Emissions Rule rendered the 1980 exemption obsolete 
in the major modification context, the EPA also removed the 1980 
exemption in the 2008 rule.
---------------------------------------------------------------------------

    \15\ Newmont Mining Corporation, EPA-HQ-OAR-2004-0014-0005.
    \16\ Jeffrey R. Holmstead, EPA, EPA-HQ-OAR-2004-0014-0014.
---------------------------------------------------------------------------

E. Petition for Reconsideration and Administrative Stays of the 
Fugitive Emissions Rule

    On February 17, 2009, the Natural Resources Defense Council (NRDC) 
submitted a petition for reconsideration of the 2008 Fugitive Emissions 
Rule under CAA 307(d)(7)(B).\17\ On April 24, 2009, the EPA responded 
by letter indicating that the EPA was convening a reconsideration 
proceeding and granting a 3-month administrative stay of the rule.\18\
---------------------------------------------------------------------------

    \17\ John Walke, NRDC, EPA-HQ-OAR-2004-0014-0060.
    \18\ Lisa Jackson, EPA, EPA-HQ-OAR-2004-0014-0062.
---------------------------------------------------------------------------

    The initial 3-month administrative stay of the Fugitive Emissions 
Rule became effective on September 30, 2009. 74 FR 50115 (September 30, 
2009). An interim final rule extending the stay for an additional 3 
months became effective on December 31, 2009. 74 FR 65692 (December 11, 
2009). An additional 18-month stay became effective on April 1, 2010. 
75 FR 16012 (March 31, 2010). In each of these stay actions (beginning 
on September 30, 2009), the EPA not only stayed the CFR paragraphs 
added or changed by the Fugitive Emissions Rule, but also amended the 
CFR to temporarily reinstate the 1980 exemption (which had been removed 
by the 2008 rule).
    These initial administrative stays were intended to ``effectuate 
this stay of the December 19, 2008, rule [by] reinstating previous 
provisions on a temporary basis.'' 74 FR 50115. However, in several 
cases, paragraphs of the affected regulations were stayed in their 
entirety, unintentionally staying existing regulatory provisions 
unrelated to those that were revised by the Fugitive Emissions Rule. To 
correct this error, on March 30, 2011, the EPA published an ``interim 
rule'' to more precisely effectuate the stay of the Fugitive Emissions 
Rule itself (i.e., to stay only those portions of the NSR regulations 
that were added or revised by the 2008 rule, without staying other 
unrelated portions of the NSR regulations). 76 FR 17548 (March 30, 
2011). In order to do this, the interim rule revised 47 paragraphs of 
the regulatory text that were changed by the Fugitive Emissions Rule, 
reverting these paragraphs to the regulatory text that existed prior to 
the Fugitive Emissions Rule.\19\ And, as with the 2009 and 2010 
actions, in the 2011 action, the EPA again added the 1980 exemption 
back to the four relevant sections of the CFR. The interim rule also 
extended the stay of seven other provisions indefinitely until the EPA 
completed its reconsideration of the Fugitive Emissions Rule.\20\
---------------------------------------------------------------------------

    \19\ For a complete list of these provisions, see 76 FR 17551.
    \20\ Although the 2011 interim rule was effective immediately, 
the EPA also provided a public comment period. 76 FR 17551. This 
solicitation of comments pertained to the procedural action 
undertaken in the 2011 interim rule--measures to stay the 
effectiveness of the 2008 Fugitive Emissions Rule--and did not 
extend to the substance of the EPA's reconsideration of the 2008 
Fugitive Emissions Rule. Nonetheless, several comments on the 2011 
interim rule addressed substantive topics related to the EPA's 
reconsideration. The current proposed rule generally addresses those 
substantive comments as well as substantive comments provided during 
earlier regulatory actions. Commenters are welcome to submit or re-
submit any comments relevant to the content of this proposed rule.
---------------------------------------------------------------------------

    In summary, due to the EPA's stay actions described in this 
section, the Fugitive Emissions Rule only briefly took effect between 
January 20, 2009, and September 30, 2009. Since 2009, the regulations 
that predated the 2008 Fugitive Emissions Rule have been the operative 
regulations governing the treatment of fugitive emissions in the major 
modification context.

III. Proposed Action

A. Results of the EPA's Reconsideration

    This proposed rule seeks to close out the reconsideration process 
initiated in 2009 in a manner that better aligns with the structure and 
purpose of the NSR program and that minimizes confusion for all 
stakeholders. After reevaluating the legal and policy bases of the 
Fugitive Emissions Rule, the EPA no longer considers that rule's 
treatment of fugitive emissions in the context of major modifications 
to be appropriate. Instead, for the reasons described further in 
Sections IV and V of this preamble, the EPA is proposing to reaffirm 
the EPA's longstanding interpretation of CAA sections 302(j) and 
111(a)(4). Specifically, the EPA proposes to reaffirm its 
interpretation that the language in CAA section 302(j) regarding 
fugitive emissions applies only in the major source context, and not in 
the major modification context. The EPA proposes to interpret CAA 
section 111(a)(4) to require that all sources consider increases in all 
types of emissions (including fugitive emissions) in determining 
whether a proposed change would constitute a major modification. 
Accordingly, the EPA is proposing to repeal the 2008 Fugitive Emissions 
Rule by removing the portions of the 2008 rule that remain in the 
agency's NSR regulations.
    Additionally, in light of the statutory interpretation presented in 
Section IV.C of this preamble, the EPA is proposing to remove the 
``major solely due to the inclusion of fugitive emissions'' exemption 
first promulgated in 1980 and reinstated in 2009. As described in 
Section II.D of this preamble, this 1980 exemption was inadvertently 
left in the EPA's regulations from 1989 to 2008 despite the fact that 
the agency had interpreted the statute in that period (as EPA proposes 
now) to provide no such exemption in the context of

[[Page 62328]]

modifications. This inconsistency, along with other issues related to 
the 1980 exemption, has created significant uncertainty about the EPA's 
treatment of fugitive emissions in the major modification context.

B. Proposed Revisions to Regulations

    The Fugitive Emissions Rule revised similar regulatory text in all 
four sections of the CFR associated with the major NSR program, 
including 40 CFR 51.165, 51.166, 52.21, and appendix S to part 51. This 
proposed action would revise the text in each of these four sections in 
order to fully repeal the 2008 rule.
    As discussed in Section II.E of this preamble, the EPA's March 2011 
interim rule revised 47 paragraphs of the regulatory text that had been 
changed by the Fugitive Emissions Rule, reverting these paragraphs back 
to the text that existed prior to the Fugitive Emissions Rule. These 
paragraphs need not be revised further in this action in order to 
repeal the Fugitive Emissions Rule. To the extent necessary, the EPA 
proposes in this action to affirm those changes to the regulatory text 
effectuated in the March 2011 interim rule and lift the ``interim'' 
label from those aspects of the 2011 rule.
    Seven additional paragraphs that were added (instead of revised) by 
the Fugitive Emissions Rule were stayed in the EPA's 2009, 2010, and 
2011 actions, but still exist within the EPA's NSR regulations. 40 CFR 
51.165(a)(1)(v)(G), 51.165(a)(1)(vi)(C)(3), 51.166(b)(2)(v), 
51.166(b)(3)(iii)(d), part 51 appx. S II.A.5(vii), 52.21(b)(2)(v), 
52.21(b)(3)(iii)(c). These provisions are accompanied by a notation in 
the CFR (at the end of each CFR section) that these provisions are 
stayed and have no current legal effect. For these paragraphs, the EPA 
is proposing to concurrently lift the existing stay and remove these 
provisions from the regulations (the only way to remove these 
provisions is to lift the stay). In so doing, the EPA intends to 
permanently restore the relevant regulatory text that existed before 
the Fugitive Emissions Rule was promulgated.
    Four paragraphs embodying the 1980 exemption were removed by the 
Fugitive Emissions Rule, but were reinstated in the EPA's 2009, 2010, 
and 2011 actions in order to effectuate a stay of the Fugitive 
Emissions Rule. 40 CFR 51.165(a)(4), 51.166(i)(1)(ii), 
52.21(i)(1)(vii), and part 51 appx. S II.F. In light of the 
interpretation advanced in Section IV.C of this preamble--that all 
sources must account for fugitive emissions in determining whether a 
modification is major--the EPA is also proposing to remove these 
provisions embodying the 1980 exemption.
    Given the number and complexity of the regulatory provisions 
impacted by the Fugitive Emissions Rule and the current proposal, the 
EPA specifically seeks comment on whether the proposed changes to the 
regulatory text, in addition to those changes previously made in 2011, 
will fully effectuate the repeal of the Fugitive Emissions Rule and 
conform the EPA's regulations to the interpretation described in 
Section IV.C of this preamble.

IV. Interpretation of CAA Sections 302(j) and 111(a)(4)

    The plain language of CAA sections 302(j) and 111(a)(4), as well as 
the legislative history and case law involving these provisions, 
supports requiring that all existing major sources include fugitive 
emissions when determining whether a modification at the source 
requires a major NSR permit. This view is consistent with the approach 
the EPA has applied in the NSR program for most of the past 4 decades, 
but the EPA has inadvertently fostered uncertainty on this subject 
through its rulemaking actions and omissions. To end this uncertainty 
and better align the regulations with the structure and purpose of the 
NSR program, the EPA proposes to affirm the longstanding interpretation 
that fugitive emissions must be counted from all existing major sources 
when determining whether a modification is major. As discussed in 
Section V of this preamble, this approach properly accommodates the 
relevant policy considerations associated with balancing the potential 
air quality benefits that could result from this action with the 
potential impacts on a limited subset of sources.

A. Previous EPA Interpretations

    When the EPA established the foundation for the current NSR program 
in response to the 1977 CAA Amendments, the EPA required all 
quantifiable emissions (including fugitive emissions) to be considered 
in determining whether sources are subject to major NSR. 43 FR 26388, 
26395 (June 19, 1978) (``[T]he regulations do not exclude fugitive dust 
from the determination of potential emissions.'').\21\ However, in 
recognition of concerns from the surface coal mining industry, the 
EPA's 1978 regulations excluded ``fugitive dust'' from air quality 
impact assessments for new and modified sources. See, e.g., 40 CFR 
52.21(k)(5) (1978); 43 FR 26395.
---------------------------------------------------------------------------

    \21\ As the EPA later explained, prior to 1980, the ``EPA 
considered all reasonably quantifiable emissions of a pollutant--
including both point emissions (e.g., from a stack or chimney) and 
fugitive emissions--on the ground[s] that the emissions deteriorate 
air quality regardless of how they emanate.'' 45 FR 52690 (August 7, 
1980).
---------------------------------------------------------------------------

    In its 1979 Alabama Power decision, the U.S. Court of Appeals for 
the D.C. Circuit considered various challenges to the 1978 NSR 
regulations, including those related to the treatment of fugitive 
emissions. In relevant part, the D.C. Circuit stated that it had 
``reason to doubt whether EPA possesses the statutory authority to 
promulgate the [fugitive dust] exception in this manner.'' Id. at 
370.\22\ Although the court did not specifically resolve the matter, it 
nonetheless vacated and remanded the 1978 fugitive dust exemption 
``[i]n light of [the court's] interpretation of section 302(j), and in 
accordance with [the court's] discussion as to the limits of EPA 
general exemption authority.''
---------------------------------------------------------------------------

    \22\ In suggesting this, the court referred to another section 
of its opinion, where the court identified ``principles pertinent to 
an agency's authority to adopt general exemptions to statutory 
requirements.'' Id. at 357; see id. at 357-361.
---------------------------------------------------------------------------

    The D.C. Circuit's discussion of CAA section 302(j) was 
particularly noteworthy. CAA section 302(j) defines ``major stationary 
source'' and ``major emitting facility'' as ``any stationary facility 
or source of air pollutants which directly emits, or has the potential 
to emit, one hundred tons per year or more of any air pollutant 
(including any major emitting facility or source of fugitive emissions 
of any such pollutant, as determined by rule by the Administrator).'' 
42 U.S.C. 7602(j). The D.C. Circuit held that CAA ``section 302(j) 
specifically attaches a rulemaking requirement for the inclusion of 
fugitive emissions in the threshold calculation'' of determining 
whether a source is a ``major emitting facility.'' 636 F.2d at 369.\23\
---------------------------------------------------------------------------

    \23\ The D.C. Circuit found that the general definition of 
``major stationary source'' or ``major emitting facility'' in CAA 
section 302(j) was not expressly modified by the PSD-specific 
definition of ``major emitting facility'' in CAA section 169(1) 
(which is silent with respect to fugitive emissions), and 
accordingly that CAA section 302(j)'s rulemaking requirement for 
fugitive emissions controlled with respect to the PSD program. 636 
F.2d at 370.
---------------------------------------------------------------------------

    In response to the Alabama Power decision, in its 1980 revisions to 
the NSR regulations, the EPA removed the 1978 partial exclusion for 
fugitive dust. In order to implement the CAA section 302(j) rulemaking 
requirement, the EPA also listed, by rule, a number of source 
categories for which fugitive emissions were to be considered in 
threshold determinations. See 45 FR 52676 (August 7, 1980) 
(promulgating, e.g., 40

[[Page 62329]]

CFR 52.21(i)(4)(vii), which was later recodified at 40 CFR 
52.21(i)(1)(vii) in 2002). Specifically, although the 1980 regulations 
required all sources to include fugitive emissions in the first 
instance when determining whether a new source or modification was 
considered major, the 1980 rule provided an exemption from substantive 
major NSR requirements for sources that did not belong to a listed 
source category if the source or modification would be considered 
``major'' solely due to the inclusion of fugitive emissions. This 1980 
exemption did not differentiate between ``major source'' and ``major 
modification'' inquiries. However, the EPA did not discuss this lack of 
differentiation, nor did the EPA suggest that this result was required 
by CAA section 302(j) or the Alabama Power decision.\24\
---------------------------------------------------------------------------

    \24\ The EPA's 1980 preamble discussion spoke generally of 
``threshold determinations'' or ``threshold calculations'' but did 
not specifically evaluate whether or how both the major source and 
major modification inquiries were implicated by CAA section 302(j) 
and the Alabama Power decision. Where the EPA did speak more 
specifically to one of these inquiries, it spoke only to ``major 
emitting facility'' (i.e., ``major source'') determinations under 
CAA sections 169(1) and 302(j). See, e.g., 45 FR 52690.
---------------------------------------------------------------------------

    When the EPA revised the NSR regulations in 1984 to better 
implement the CAA section 302(j) rulemaking requirement, it finalized 
regulatory text within the definition of ``major source'' that more 
directly excluded fugitive emissions from major source calculations for 
sources not in the listed source categories. 49 FR 43202 (October 26, 
1984). However, the EPA decided not to finalize similar revisions with 
respect to major modifications. Instead, in a companion document 
accompanying the 1984 rule, the EPA for the first time took a closer 
look at the applicability of section 302(j) and the Alabama Power 
decision in the context of major modifications. The EPA explained that 
in its 1980 and 1983 regulatory actions, the ``EPA assumed that the 
rulemaking requirement in section 302(j) applies to modifications as 
well as to sources.'' 49 FR 43213 (October 26, 1984) (emphasis 
added).\25\ The EPA further explained that the litigants and commenters 
on those 1980 and 1983 actions similarly ``carried that assumption into 
their communications, without evidencing any examination of it.'' Id. 
After examining the assumption for the first time in 1984, the EPA 
``concluded that it appears to be incorrect.'' Id. Accordingly, the EPA 
proposed an ``interpretive rule'' outlining its interpretation that CAA 
section 302(j) did not apply in the major modification context, and 
that all sources (not just those in a listed source category) should 
include fugitive emissions in the major modification context. The 1984 
proposed interpretive rule, summarized in the following paragraphs, 
explained the basis for the decision in considerable detail. See 49 FR 
43213.
---------------------------------------------------------------------------

    \25\ Put another way, the EPA's 1980 interpretation ``took it 
for granted'' that fugitive emissions would be treated the same for 
major source and major modification determinations. 72 FR 63857 
(November 13, 2007).
---------------------------------------------------------------------------

    First, the EPA explained that the plain language of the Act 
strongly suggests that Congress did not intend the rulemaking 
requirement in section 302(j) to apply to modifications. The EPA noted 
that CAA section 302(j) on its face defines major source and does not 
speak to modifications of those sources. By contrast, the EPA noted 
that the definition of ``modification'' in CAA section 111(a)(4) (which 
is incorporated by the statutory provisions for major NSR \26\) appears 
to require the inclusion of fugitive emissions in threshold 
applicability determinations for modifications. CAA section 111(a)(4) 
provides that ``the term `modification' means any physical change in, 
or change in the method of operation of, a stationary source which 
increases the amount of any air pollutant emitted by such source or 
which results in the emissions of any air pollutant not previously 
emitted.'' 42 U.S.C. 7411(a)(4). The EPA indicated that, in defining 
``modification'' solely in terms of the total amount of pollution that 
a source change would produce, section 111(a)(4) suggests that Congress 
intended to establish here no qualitative distinction between different 
types of emissions (e.g., fugitive or non-fugitive). Thus, the EPA 
concluded that Congress intended to require the inclusion of fugitive 
emissions for modifications without any intermediate rulemaking step. 
49 FR 43213.
---------------------------------------------------------------------------

    \26\ CAA section 169(2)(C), 42 U.S.C. 7479(2)(C), which governs 
the PSD program, states: ``The term `construction' when used in 
connection with any source or facility, includes the modification 
(as defined in section 111(a) of this title) of any source or 
facility.'' CAA section 171(4), 42 U.S.C. 7501(4), which governs the 
NNSR program, states: ``The terms `modification' and `modified' mean 
the same as the term `modification' as used in section 111(a)(4) of 
this title.''
---------------------------------------------------------------------------

    Next, the EPA's 1984 interpretive rule examined the legislative 
history surrounding these statutory provisions. With respect to CAA 
section 302(j), the EPA noted that the passages in the relevant House 
and conference reports that focus on CAA section 302(j) (as well as CAA 
section 302(j) itself) refer only to major sources, and not to 
modifications of these sources. 49 FR 43213 (citing H.R. Report No. 95-
294, 95th Cong., 1st Sess. 4, 9, 144 (1977); H.S. Rep. No. 95-564, 95th 
Cong., 1st Sess. 172 (1977)). With respect to the reference to 
``modification'' in the PSD provisions of the Act, the EPA indicated 
that the conference committee said that it ``[i]mplements conference 
agreement to cover `modification' as well as `construction' by defining 
`construction' in Part C to conform to usage in other parts of the 
Act.'' Id. (quoting 123 Cong. Rec. H. 11957. col. 3 (daily ed.) 
(November 1, 1977)). The EPA posited that the phrase ``usage in other 
parts of the Act,'' most likely refers not only to CAA section 
111(a)(4), but also to the EPA regulations implementing section 111 
that were in effect at the time. Id. The EPA explained that those 
regulations (as well as CAA section 111(a)(4) itself) on their face 
require the inclusion of fugitive emissions in CAA section 111 
applicability determinations, inasmuch as they concern themselves only 
with the quantity of the emissions in question. Id. (citing 40 CFR 
60.14(a) (1977)). Moreover, the EPA explained that prior to the 
enactment of CAA section 302(j) in 1977, both the EPA and states made 
no distinction between fugitive and non-fugitive emissions in threshold 
applicability determinations. Id. (citing 40 CFR 51.18, 52.21(d)(1) 
(1977); 41 FR 55528 (December 21, 1976)). Given that CAA section 302(j) 
ran against longstanding practice throughout the agency's 
implementation of the CAA, the EPA suggested that if Congress had 
intended a change as to modifications, it probably would have said so 
explicitly, yet Congress said nothing. Id.
    The 1984 interpretive rule also addressed practical issues related 
to the inclusion or exclusion of fugitive emissions in major 
modification determinations and concluded that including fugitive 
emissions in this context would be consistent with Congress's purposes, 
including the potential relief from the burdens of NSR afforded by the 
CAA section 302(j) rulemaking requirement. Given that the EPA's 
regulations did not require unlisted sources with predominantly 
fugitive emissions (e.g., surface coal mines) to count fugitive 
emissions towards major source thresholds, the EPA noted that it is 
unlikely that those sources would be considered major sources in the 
first instance. And, because only modifications to an existing major 
source can be considered major modifications, the EPA concluded that it 
would be unlikely for sources of predominantly fugitive emissions to be 
subject to major NSR due to a

[[Page 62330]]

modification, even under the EPA's proposed interpretation. 49 FR 
43214.
    When the EPA ``affirmed'' the 1984 interpretive rule in a related 
1989 rulemaking, it did so based on the justifications presented in 
1984, with some additional discussion based on comments received from 
stakeholders. See 54 FR 48882 (November 28, 1989). Specifically, 
commenters argued: (1) that congressional silence on the subject 
indicated a lack of guidance (rather than support for the EPA's 
position) and (2) because new sources and modifications are generally 
treated the same in most respects under the Act, there is no basis to 
treat them differently under CAA section 302(j). The EPA was not 
persuaded by these comments. The EPA concluded that its interpretation 
was both reasonable and proper, warranting deference under Chevron, 
U.S.A. Inc. v. Natural Resources Defense Council, 467 U.S. 837 (1984). 
Additionally, the EPA reiterated and elaborated on its view that the 
agency's interpretation should have little general impact on sources of 
predominantly fugitive emissions like surface coal mines. This remained 
the EPA's interpretation of CAA sections 302(j) and 111(a)(4) until the 
Fugitive Emissions Rule was proposed in 2007 and finalized in 2008.\27\
---------------------------------------------------------------------------

    \27\ None of the EPA documents or actions that followed the 1989 
interpretive ruling (e.g., the EPA's 1990 DRAFT NSR workshop manual, 
the 1995 Masonite EAB decision, or the 2002 NSR Reform Rule) 
addressed the substance of the interpretations presented in 1989. As 
noted in the preamble to the 2008 rule, potentially conflicting 
statements in the 1990 DRAFT NSR workshop manual were not intended 
to reflect a change in position from the 1989 interpretive rule. See 
73 FR 77885 (December 19, 2008). The 1995 Masonite EAB decision 
considered how the 1980 exemption (which, as noted in Section II.D 
of this preamble, was inadvertently not removed from the EPA's 
regulations in 1989) functioned in practice, and did not evaluate 
the EPA's 1989 interpretive rule or the statutory bases underlying 
the agency's 1989 interpretation. See 5 EAD at 581-83. The 2002 NSR 
Reform Rule explicitly codified the position expressed in the 1989 
interpretive rule, without further discussion of the EPA's 
interpretation of the relevant statutory provisions.
---------------------------------------------------------------------------

    The Fugitive Emissions Rule represented a significant shift in the 
EPA's treatment of fugitive emissions. This 2008 rule was the first 
time the EPA had, after focused deliberation, applied the CAA section 
302(j) rulemaking requirement to major modifications, such that only 
sources in categories listed by rule would need to account for fugitive 
emissions when determining whether a project constituted a major 
modification.
    To justify this changed interpretation, the EPA argued that the 
lack of any reference in CAA section 302(j) to ``major modification,'' 
in addition to a scant legislative history, created ambiguity and room 
for the EPA to extend CAA section 302(j) to the context of major 
modifications.\28\ See 73 FR 77888 (December 19, 2008). The EPA stated 
that it could not conclude from the statutory text or legislative 
history what Congress specifically intended on this point.\29\ 
Accordingly, the EPA suggested that Congress simply did not know enough 
to make the critical decisions regarding the treatment of fugitive 
emissions in the major source and major modification contexts, instead 
assigning resolution of these complex issues to the EPA. The EPA 
additionally posited that CAA ``section 302(j) evinces, at a minimum, 
an intent by Congress to require a special look at fugitive emissions 
for purposes of calculating a source's emissions for NSR purposes.'' 73 
FR 77888.\30\
---------------------------------------------------------------------------

    \28\ Notably, even as the EPA reversed its prior interpretation 
of CAA 302(j), it nonetheless maintained that the EPA's historical 
interpretation finalized in 1989 remained a reasonable construction 
of the statute.
    \29\ The EPA indicated that no authoritative conference or 
committee report addressed the issue of how fugitive emission should 
be addressed in NSR permitting. The EPA nonetheless addressed 
portions of the legislative history reflecting industry testimony 
detailing concerns with the feasibility of controlling or measuring 
fugitive emissions.
    \30\ The EPA's rationale in the Fugitive Emissions Rule focused 
on CAA section 302(j) and largely did not address CAA section 
111(a)(4). After summarizing the EPA's prior interpretation (and 
public comments) relating to the CAA section 111(a)(4) definition of 
``modification,'' the EPA simply asserted that this statutory 
provision does not ``address the issue'' without further discussion. 
73 FR 77888.
---------------------------------------------------------------------------

    The EPA then explained the policy and programmatic reasons 
supporting its shift in approach. First, the EPA stated that its new 
position was most consistent with its earliest and most nearly 
contemporaneous construction of the statute in the 1980 NSR rules. The 
EPA argued that providing a more uniform approach--i.e., treating 
fugitive emissions the same in both major source and major modification 
contexts--more accurately reflected the original intent of Congress in 
establishing CAA section 302(j) and the resulting EPA rules that 
followed. Second, the EPA said that the revised position better 
addressed an additional regulatory burden that had not been adequately 
recognized in the past. Specifically, the EPA asserted that the EPA's 
policies discussed in 1984 and 1989 would have imposed a new burden on 
major sources in unlisted source categories, ``since their fugitive 
emissions would be counted in determining whether they had made a 
change constituting a major modification and thus possibly subjecting 
those modifications to NSR review.'' 73 FR 77889.

B. NRDC's Petition for Reconsideration

    NRDC's 2009 petition for reconsideration argued that the Fugitive 
Emissions Rule was unlawful and urged the EPA to return to its prior 
interpretation concerning fugitive emissions. NRDC's petition focused 
largely on the definition of ``modification'' in CAA section 111(a)(4). 
Citing CAA section 111(a)(4) and the D.C. Circuit's 2005 New York v. 
EPA decision (New York I),\31\ NRDC emphasized that the definition of 
modification focuses exclusively on increases in ``actual'' emissions. 
NRDC asserted that the EPA's prior interpretations echoed this focus 
and did not differentiate between stack emissions and fugitive 
emissions, instead focusing on the total amount of pollution that a 
change at a source would produce. Citing the D.C. Circuit's 2006 New 
York v. EPA decision (New York II),\32\ NRDC further asserted that the 
coverage of CAA section 111(a)(4) is broad--including any physical 
change that increases emissions--and subject only to narrow de minimis 
exceptions.
---------------------------------------------------------------------------

    \31\ 413 F.3d 3, 40 (D.C. Cir. 2005).
    \32\ 443 F.3d 880, 885 (D.C. Cir. 2006).
---------------------------------------------------------------------------

    NRDC claimed that, in promulgating the Fugitive Emissions Rule, the 
EPA failed to address the definition of modification in CAA section 
111(a)(4), explain its reversal of its interpretation of this statutory 
provision, or respond to comments concerning this provision. Moreover, 
NRDC claimed that the Fugitive Emissions Rule created an impermissible 
exemption to the definition of ``modification'' because the EPA did not 
(and could not) claim (1) that the exemption was supported by the de 
minimis doctrine, (2) that increased fugitive emissions do not qualify 
as ``the amount of any air pollutant emitted by such source'' under CAA 
section 111(a)(4), or (3) that exempt fugitive emissions increases do 
not fall within the meaning of ``any physical change'' or ``any'' 
change in the method of operation under CAA section 111(a)(4).\33\ As 
noted previously, on April 24, 2009, the EPA responded by letter 
indicating that the EPA was convening a reconsideration proceeding.
---------------------------------------------------------------------------

    \33\ The NRDC petition also raised other arguments, including a 
discussion of the legislative history of CAA section 302(j) and 
other concerns related to the implementation of the Fugitive 
Emissions Rule by state and local air agencies.
---------------------------------------------------------------------------

C. Proposed Interpretation of CAA Sections 302(j) and 111(a)(4)

    After reconsidering the 2008 Fugitive Emissions Rule, the EPA 
proposes to return to the position first articulated in 1984, adopted 
in a final action in 1989,

[[Page 62331]]

and which remained the EPA's interpretation until revisited in 2008. 
Given CAA section 302(j)'s silence with respect to modifications, in 
conjunction with the definition of ``modification'' in CAA section 
111(a)(4), the EPA does not believe the CAA section 302(j) rulemaking 
requirement applies to major modification determinations. Moreover, the 
EPA does not consider it appropriate to allow existing major sources in 
non-listed source categories to omit increases and decreases in 
fugitive emissions when evaluating whether a physical or operational 
change constitutes a major modification. All major sources should 
include both stack and fugitive emissions in the major modification 
context.
    The EPA considers this a prudent change in position. The EPA's 
treatment of fugitive emissions in modifications has a complicated 
history, particularly during the early years of the NSR program 
following the 1977 CAA Amendments. However, the interpretation advanced 
now most closely aligns with the interpretation of CAA section 302(j) 
originally proposed in 1984 and adopted in 1989. This interpretation 
was more thoughtful and fully developed than the one the EPA had 
followed from 1980 until 1984,\34\ and has reflected the EPA's position 
for the majority of the NSR program's existence.\35\ More importantly, 
the legal and policy reasoning advanced in the 1984 and 1989 actions 
(summarized in Section IV.A of this preamble), in light of more recent 
case law (New York I and II), reflects a more complete depiction of the 
relevant statutory authorities than the reasoning articulated in the 
2008 Fugitive Emissions Rule. The EPA also believes this approach fully 
accommodates congressional intent and the practical and policy 
considerations surrounding this issue. Therefore, for the reasons 
detailed later in this preamble, the EPA is well-justified in returning 
to its longest-standing view concerning the treatment of fugitive 
emissions in the major modification context.
---------------------------------------------------------------------------

    \34\ As noted in the EPA's 1984 action (and acknowledged in the 
Fugitive Emissions Rule itself), the EPA's interpretations prior to 
1984 ``assumed'' and ``took for granted'' that fugitive emissions 
should be treated the same for major source and major modification 
decisions, without evaluating whether CAA section 302(j) or the D.C. 
Circuit's Alabama Power decision lent themselves to this result. See 
49 FR 43213 (October 26, 1984); 72 FR 63857 (November 13, 2007). 
Thus, the EPA's claim in 2008 that the Fugitive Emissions Rule was 
``most consistent with EPA's earliest and most nearly 
contemporaneous construction of the statute'' was not entirely 
accurate. 73 FR 77888 (December 19, 2008). By the EPA's 2008 logic, 
one could just as easily describe the EPA's 1978 approach--which 
considered fugitive emissions from all sources for both major source 
and major modification purposes--as the ``most nearly 
contemporaneous construction of the statute.'' However, both the 
EPA's 1978 and 1980-1983 approaches similarly neglected to fully 
consider of the specific text of CAA sections 302(j) and 111(a)(4).
    \35\ The EPA's alternate interpretation--proposed in 2007 and 
finalized in the 2008 Fugitive Emissions Rule--was effective for 
only a short period of time between the Fugitive Emissions Rule's 
effective date of January 20, 2009, and when the first stay of the 
rule became effective on September 30, 2009.
---------------------------------------------------------------------------

    CAA section 302(j), as interpreted by the Alabama Power court, 
restricts the EPA's consideration of fugitive emissions in certain 
situations, requiring a rulemaking before the EPA can consider such 
emissions towards major stationary source thresholds. In extending this 
rulemaking requirement to major modifications, the 2008 rule focused 
largely on the fact that both CAA section 302(j) and the accompanying 
legislative history were silent with respect to the treatment of 
fugitive emissions for major modification purposes. The EPA concluded 
that CAA section 302(j) indicates congressional intent ``to require a 
special look at fugitive emissions for purposes of calculating a 
source's emissions for NSR purposes.'' 73 FR 77888 (December 19, 2008). 
This conclusion, while true to an extent, reflected an overbroad 
understanding of the ``special look'' required by CAA section 302(j), 
which is not specific to NSR \36\ and only explicitly addresses one 
aspect of the expansive NSR program (major source determinations).\37\ 
Notwithstanding this ``special look,'' the EPA did not in 2008 
interpret CAA section 302(j) as requiring the EPA to conduct rulemaking 
to identify source categories prior to including fugitive emissions in 
the major modification context. Instead, the EPA determined that the 
congressional silence gave the agency the discretion to ``apply'' the 
CAA section 302(j) methodology to major modifications.\38\ Moreover, in 
the final Fugitive Emissions Rule in 2008, the EPA acknowledged that 
its prior interpretation remained a permissible construction of the Act 
(as the agency had previously asserted in 1989). 73 FR 77888; see 54 FR 
48883 (November 28, 1989).
---------------------------------------------------------------------------

    \36\ For example, the definition of ``major stationary source'' 
in CAA section 302(j) is also implicated by the title V operating 
permits program. See, e.g., 42 U.S.C. 7661(2)(B).
    \37\ Most aspects of the NSR program treat fugitive and non-
fugitive emissions similarly. See supra note 6 and accompanying 
text.
    \38\ Compare 73 FR 77889 (December 19, 2008) (final rule, 
described in text) with 72 FR 63857 (November 13, 2007) (proposed 
rule, which had proposed to ``conclude that it is reasonable to 
interpret section 302(j) to require EPA to conduct rulemaking to 
identify source categories that should include their fugitive 
emissions for all threshold applicability purposes.'' (emphasis 
added)).
---------------------------------------------------------------------------

    Moreover, the EPA's 2008 conclusion that Congress ``simply did not 
know enough to make the critical decisions regarding the extent to 
which fugitive emissions should be included in threshold applicability 
determinations'' for both major source and major modification 
determinations is undermined by the fact that Congress chose to 
explicitly provide special treatment of fugitive emissions in the 
relevant definition of major source, while declining to do so in the 
relevant definition of major modification. As the EPA first explained 
in 1984, because the special treatment of fugitive emissions in CAA 
section 302(j) ``ran against the grain of longstanding practice[, i]f 
Congress had intended a change as to modifications, it probably would 
have said so explicitly, yet it said nothing.'' 49 FR 43213 (October 
26, 1984).
    On its face, CAA section 302(j) only applies to determining what 
constitutes a ``major stationary source.'' CAA section 302(j) does not 
merely reference this concept, but literally defines this specific term 
(along with the interchangeable term, ``major emitting facility''), and 
this term alone. Nothing in the definition of ``major stationary 
source'' in CAA section 302(j)--or its usage elsewhere in the NSR-
relevant statutory provisions \39\--suggests that its restriction on 
counting fugitive emissions was intended to be extended to other, 
distinct definitions or inquiries, such as the operative definition of 
``modification'' in CAA section 111(a)(4). Rather than expand this 
principle to other contexts, the silence in CAA section 302(j) with

[[Page 62332]]

respect to anything other than ``major source'' inquiries suggests 
Congress's intent to confine the fugitive emissions rulemaking 
requirement to major source determinations. The EPA's authority to 
apply a similar treatment in another, different context depends on the 
operative statutory provisions governing that context.\40\ As discussed 
in the following paragraphs, in the context of determining whether a 
major modification has occurred, the EPA does not interpret CAA section 
111(a)(4) as providing a basis for restricting consideration of 
fugitive emissions in such a manner.
---------------------------------------------------------------------------

    \39\ The definitions of ``major stationary source'' (or ``major 
emitting facility'') in CAA section 302(j) and ``modification'' in 
CAA section 111(a)(4) are related in that both are implicated by the 
statutory provisions governing NSR applicability. For example, CAA 
section 165 states that the ``construction'' of a ``major emitting 
facility'' triggers PSD, and ``construction'' is defined by CAA 
section 169 to include both new construction as well as 
modifications, as defined in section 111(a). 42 U.S.C. 7475(a), 
7479(2)(C). However, the fact that PSD can be triggered either by 
the construction of a new major source or by the modification of a 
major source does not mean that the restrictions in defining what 
constitutes a major source also apply to determining whether a 
modification has occurred to such a major source. The distinction 
between these two concepts is apparent throughout the EPA's NSR 
regulations, which apply different rules to new major sources and 
modified major sources. And, while the definition of ``major 
source'' and the restrictions in CAA section 302(j) continue to be 
relevant to major modifications to a certain extent--since only 
existing major sources can undergo a major modification--this 
preliminary inquiry into whether an existing source is a major 
source is distinct from the inquiry of whether a change at such a 
source amounts to a major modification.
    \40\ Notably, the D.C. Circuit has emphasized the limited reach 
of CAA section 302(j) with respect to other areas of the CAA, such 
as the EPA's regulation of hazardous air pollutants under CAA 
section 112. See NMA v. EPA, 59 F.3d 1351, 1360-61 (D.C. Cir. 1995).
---------------------------------------------------------------------------

    The EPA's 1984 and 1989 interpretations of the definition of 
``modification'' in CAA section 111(a)(4) formed a central tenet of the 
agency's prior position that all emissions--both stack and fugitive--
must be accounted for in the modification context. CAA section 
111(a)(4) provides that ``the term `modification' means any physical 
change in, or change in the method of operation of, a stationary source 
which increases the amount of any air pollutant emitted by such source 
or which results in the emissions of any air pollutant not previously 
emitted.'' 42 U.S.C. 7411(a)(4).\41\ As first stated in 1984, the EPA 
proposes to reaffirm in this rule that, in defining ``modification'' 
solely in terms of the total amount of pollution that a change would 
produce, Congress did not make a distinction between different types of 
emissions--stack or fugitive--in the context of modifications under the 
major NSR program. CAA section 111(a)(4)'s discussion of ``any'' 
physical or operational change, and its focus on increases in ``any air 
pollutant,'' further support this position. This is consistent with the 
EPA's historical interpretation of CAA section 111(a)(4) in other 
relevant contexts, namely the NSPS program. See, e.g., 49 FR 43213 
(October 26, 1984).
---------------------------------------------------------------------------

    \41\ The Fugitive Emissions Rule did not engage with this 
definition; instead, the EPA asserted simply that CAA section 
111(a)(4) does not ``address the issue.'' Given that Congress was 
clearly able to provide special consideration for fugitive emissions 
in CAA section 302(j), the fact that CAA section 111(a)(4) does not 
specifically address fugitive emissions actually undercuts, rather 
than supports, the argument that fugitive emissions should be 
treated in a special way for purposes of determining whether a 
change is a major modification.
---------------------------------------------------------------------------

    This interpretation is also consistent with case law discussing the 
boundaries on the EPA's authority to establish exemptions to major NSR. 
As early as 1979, the Alabama Power court expressed skepticism of the 
EPA's authority to promulgate its initial 1978 exemption for fugitive 
dust--remanding that provision and providing extensive discussion of 
the limits on EPA's general exemption authority. 636 F.2d at 370; see 
id. at 357-61. More recently, as noted in NRDC's petition for 
reconsideration, the D.C. Circuit's New York I and New York II 
decisions further explored the EPA's limited ability to establish 
exemptions to the definition of ``modification'' in the context of 
major NSR. In New York I, the court ``conclude[d] that the CAA 
unambiguously defines `increases' in terms of actual emissions,'' 
explaining that the phrase `` `the amount of any air pollutant emitted 
by [the] source' [in CAA section 111(a)(4)] plainly refers to actual 
emissions.'' 413 F.3d at 40. In New York II, the court stated the 
following: ``Because Congress used the word `any,' EPA must apply NSR 
whenever a source conducts an emission-increasing activity that fits 
within one of the ordinary meanings of `physical change.' '' 443 F.3d 
at 885. Additionally, in vacating an exclusion from NSR applicability, 
the court concluded, ``only physical changes that do not result in 
emission increases are excused from NSR.'' Id. at 887. Thus, allowing 
certain sources to omit fugitive emissions in determining whether a 
change is a major modification would run counter to the D.C. Circuit's 
direction that modifications must account for all actual emissions 
increases from ``any'' physical change (i.e., not just changes that 
increase non-fugitive emissions), subject only to de minimis 
exceptions.
    In summary, for purposes of major NSR, the EPA proposes to affirm 
that CAA section 302(j) requires rulemaking before considering a 
source's fugitive emissions only in the major source context, and not 
in the major modification context. The EPA proposes to restore its 
longest-standing interpretation that CAA section 111(a)(4) requires 
that all major sources consider increases in all types of emissions 
(including fugitive emissions) in determining whether a proposed change 
would constitute a major modification.
    The EPA has considered the legal issues underlying the treatment of 
fugitive emissions in major modifications in multiple actions over the 
past 4 decades. During these prior actions, the EPA has also received 
and considered a substantial amount of feedback from stakeholders, upon 
which the conclusions in this proposal are based. However, the EPA 
solicits comment concerning the interpretation of CAA sections 302(j) 
and 111(a)(4) described in this section, in light of the authorities 
and considerations discussed in this Section. The EPA seeks comment on 
whether this interpretation supports repealing the 2008 Fugitive 
Emissions Rule, as well as removing the similar ``major solely due to 
the inclusion of fugitive emissions'' exemption first established in 
1980.

V. Policy Considerations and Impact on Regulated Entities

    Through this proposal, the EPA seeks to realign its NSR regulations 
to better reflect the purpose of the NSR program and to end the 
regulatory uncertainty that has surrounded the EPA's treatment of 
fugitive emissions in the major modification context over the past four 
decades. The EPA expects any impacts of this proposed action on a 
limited subset of the regulated community to be manageable.

A. Purposes of NSR

    The NSR program was designed to protect public health and welfare 
from the effects of air pollution and to preserve and/or improve air 
quality throughout the nation. See 42 U.S.C. 7470(1), (2), (4). As the 
EPA has recognized since the early days of the NSR program, emissions 
deteriorate air quality regardless of how they emanate--whether stack 
or fugitive. 45 FR 52690 (August 7, 1980). Fugitive emissions in 
particular are more likely to have localized impacts on the air quality 
of communities located near these sources of pollution. The EPA 
welcomes comments from affected communities and other stakeholders on 
this topic and the broader air quality impacts of this rule.
    Allowing large, existing sources of pollution to ignore increases 
in fugitive emissions when determining whether a project is a major 
modification, as the EPA did in its 2008 Fugitive Emissions Rule, could 
reduce the likelihood that projects would be subject to careful 
evaluation through the major NSR permitting process, notwithstanding 
significant increases in actual air pollution. This would undermine an 
important tool that the EPA and state and local air agencies use to 
preserve and improve air quality. Thus, the EPA's proposal seeks to 
preserve the ability to evaluate all increases of air pollution at 
existing major sources, regardless of origin, consistent with the 
purposes of NSR.

[[Page 62333]]

B. Increasing Clarity

    By removing outdated and conflicting provisions from the CFR and 
aligning the regulatory text with the EPA's stated interpretation, the 
agency seeks to restore clarity, certainty, and consistency to the 
regulations. The proposed approach reflects a more straightforward, 
simplified test for determining whether a change at an existing source 
is a major modification. Collectively, the EPA expects these changes to 
assist existing major sources to better understand the requirements 
that might be applicable to planned modifications, and to streamline 
the permitting process.
    First, the proposed rule would eliminate uncertainty caused by the 
EPA's stay of the 2008 rule and the revisions to the regulatory text 
made in 2011 to effectuate the stay. Viewing the current text of the 
CFR, it is difficult to understand the proper treatment of fugitive 
emissions. The CFR is currently a patchwork of regulations that 
includes some of the paragraphs promulgated by the 2008 rule (which are 
stayed, although this may not be readily apparent from the paragraphs 
themselves) \42\ alongside reinstated paragraphs that predated, and 
conflict with, the stayed paragraphs from the 2008 rule. The proposed 
changes to remove the remaining stayed portions of the 2008 rule would 
restore much-needed clarity to the CFR.
---------------------------------------------------------------------------

    \42\ The CFR notations indicating that these provisions are 
stayed are located at the end of each CFR section, relatively far 
from the stayed paragraphs themselves.
---------------------------------------------------------------------------

    Second, the proposed changes would eliminate uncertainty caused by 
inconsistencies between the EPA's longstanding interpretation of CAA 
sections 302(j) and 111(a)(4) and the 1980 exemption. As discussed in 
Section IV.A of this preamble, from 1989 through 2008, the EPA 
interpreted CAA sections 302(j) and 114(a)(4) to require all existing 
major sources to include fugitive emissions when determining whether a 
modification is major. Nonetheless, since 1980 (excepting a brief 
period in 2009), the NSR regulations have included an exemption 
allowing certain types of sources to avoid substantive major NSR 
requirements if a modification would be considered major solely due to 
the inclusion of fugitive emissions. The EPA's failure to remove this 
1980 exemption in 1989 (and in subsequent actions) in light of the 
agency's interpretation has led to significant confusion for both 
permitting authorities and the regulated community. Additional 
confusion has resulted from the imprecise drafting of the 1980 
exemption \43\ and the fact that this regulatory text reflects outdated 
applicability procedures.\44\ The EPA expects that removing the 1980 
exemption to align the regulations with the EPA's longstanding 
interpretation (which the EPA proposes to affirm in the current action) 
will further eliminate uncertainty.
---------------------------------------------------------------------------

    \43\ See supra note 10 and accompanying text.
    \44\ See supra note 14 and accompanying text.
---------------------------------------------------------------------------

    The proposed changes provide a more straightforward method for 
accounting emissions increases and decreases in the context of 
modifications, which could potentially reduce the administrative burden 
for certain sources affected by these changes and for permitting 
authorities processing permit applications. Specifically, if the 2008 
rule is repealed and the 1980 exemption is removed, major sources in 
non-listed categories would no longer have to distinguish between 
fugitive and non-fugitive emissions in determining whether a future 
modification is major. Removing this potentially complicated and 
contentious analytical step from the permitting process would provide 
greater certainty for sources contemplating modifications and ease the 
administrative burden for both sources and permitting authorities.\45\
---------------------------------------------------------------------------

    \45\ These changes would not impact previously issued permits, 
and would only apply to permits issued after the finalization of 
this rule or the approval of a SIP reflecting similar changes, 
depending on the permitting authority.
---------------------------------------------------------------------------

C. Previous Policy Considerations

    After reevaluating the policy and programmatic reasons that 
motivated the 2008 Fugitive Emissions Rule, the EPA no longer views 
these considerations as warranting the same approach. First, in the 
2008 rule, the EPA suggested--without explanation--that it is better to 
adopt a uniform approach to major source and major modification 
determinations (that is, to allow the same sources to exclude fugitive 
emissions from both types of determinations). 73 FR 77888 (December 19, 
2008). Upon reflection, the EPA sees little benefit in pursuing this 
type of ``uniformity'' for uniformity's sake. Most elements of the NSR 
program make no distinction between stack and fugitive emissions; the 
ability for non-listed sources to exclude fugitive emissions in 
initially determining whether they constitute a major source is the 
unique exception. At a certain point in the NSR applicability 
evaluation process, all sources (including those in non-listed 
categories) must account for all emissions (including fugitive 
emissions) in determining which substantive requirements apply.\46\ 
Thus, ``uniformity'' in the treatment of fugitive emissions is 
ultimately illusory. The more pertinent issue is whether the EPA's 
approach to determining what constitutes a ``major modification'' 
should align more closely with the preliminary determination of whether 
a non-listed source is a ``major source'' (where fugitive emissions are 
excluded), or with consequent determinations concerning the application 
of substantive major NSR requirements to a major source or modification 
(where fugitive emissions are included). For the reasons presented in 
this section, the EPA believes the latter reflects better policy.\47\
---------------------------------------------------------------------------

    \46\ See supra note 6 and accompanying text. Notably, the 2008 
Fugitive Emissions Rule itself further codified this principle. See, 
e.g., 40 CFR 52.21(b)(20)(vii) (2009) (``For all other purposes of 
this section, fugitive emissions are treated in the same manner as 
other, non-fugitive emissions. This includes, but is not limited to, 
the treatment of fugitive emissions for the application of best 
available control technology (see paragraph (j) of this section), 
source impact analysis (see paragraph (k) of this section), 
additional impact analyses (see paragraph (o) of this section), and 
PALs (see paragraph (aa)(4)(i)(d) of this section).'').
    \47\ The proposed approach also establishes ``uniformity'' in 
that all existing major sources are treated the same in the 
modification context, regardless of source type.
---------------------------------------------------------------------------

    The EPA also said in 2008 that its prior approaches had not 
adequately recognized the regulatory burden associated with requiring 
all sources to consider fugitive emissions in the major modification 
context. For support, the EPA explained: ``our interpretation proposed 
in 1984 and finalized in 1989 imposed a new regulatory burden on major 
sources in a source category on the section 302(j) list, since their 
fugitive emissions would be counted in determining whether they had 
made a change constituting a major modification and thus possibly 
subjecting those modifications to NSR review.'' 73 FR 77889 (December 
19, 2008). While this was a concise summary of the potential effect of 
the EPA's pre-2008 interpretations (and the one proposed in the current 
action), this statement did not address or contradict the EPA's more 
extensive consideration and discussion of the same issue in the 
interpretive rule proposed in 1984 and finalized in 1989. In these 
prior documents, the EPA explained that few sources would likely be 
impacted by the interpretation. See 54 FR 48882 (November 28, 1989). 
The following subsection addresses these potential impacts.

[[Page 62334]]

D. Impacts on Regulated Entities

    After reevaluating currently available information, the EPA expects 
that the proposed interpretation, and the resulting revocation of the 
2008 Fugitive Emissions Rule and removal of the 1980 exemption will 
have a limited practical impact and result in limited increased burden 
for regulated entities, for the following reasons. First, revoking the 
2008 Fugitive Emissions Rule should have almost no appreciable impact 
on the status quo, given that the 2008 rule has been stayed (in some 
form) since September 2009 (less than a year after becoming effective).
    Second, removing the 1980 exemption from the regulations should 
also have a limited impact. To the EPA's knowledge, the exemption has 
generally not been relied on by sources, and the population of sources 
that could invoke the exemption is limited. The changes proposed in 
this rule would only impact sources that do not belong to a listed 
source category (as listed sources have to include fugitive emissions 
for major modification purposes under any scenario). More importantly, 
it would only impact those non-listed sources that are already 
considered existing major stationary sources (as major modifications 
can only occur at existing major sources).\48\ Given that non-listed 
sources do not count fugitive emissions towards major source 
thresholds, the EPA understands the universe of such sources to be 
relatively small, particularly for sources of predominantly fugitive 
emissions that might be most concerned with the EPA's proposed changes. 
As explained in the EPA's 1989 interpretive rule, the EPA expects that 
major NSR applicability for sources of predominantly fugitive emissions 
would, in most situations, be attributable to other existing EPA 
regulations and policies--such as those defining the scope of a 
stationary source--and not to the EPA's interpretation of CAA section 
302(j) with respect to modifications. See 54 FR 48883 (November 28, 
1989); see also 51 FR 7092 (February 28, 1986). Non-listed sources with 
large quantities of non-fugitive (stack) emissions are more likely to 
be considered major sources, and thus could be impacted by this rule. 
However, the likelihood that such a source (with large amounts of non-
fugitive emissions) would undertake a modification that would be major 
solely due to consideration of the source's fugitive emissions seems 
remote. In any case, as described in the following paragraphs, the EPA 
expects that any entities that are affected are likely well-positioned 
to handle the additional obligations of major NSR review.
---------------------------------------------------------------------------

    \48\ Although physical changes to existing non-major sources 
could trigger major NSR if the physical change itself exceeded major 
source thresholds, this would not be considered a ``major 
modification,'' but rather, a new ``major source.'' See, e.g., 40 
CFR 52.21(b)(1)(i)(c). Thus, consideration of fugitive emissions in 
this context would be governed by the EPA's long-standing 
regulations governing the treatment of fugitive emissions in major 
source determinations, and non-listed sources would not count 
fugitive emissions towards the threshold.
---------------------------------------------------------------------------

    The policy considerations that may have motivated Congress to enact 
CAA section 302(j), and which motivated the EPA's listing of certain 
source categories but not others in its definition of ``major source,'' 
are already effectively accomplished by allowing sources in non-listed 
categories to exclude fugitive emissions when determining whether they 
constitute a ``major source.'' As discussed in Section IV of this 
preamble, the sparse legislative history does not express a clear 
purpose for the treatment of fugitive emissions in CAA section 302(j). 
However, as the Alabama Power court suggested, CAA section 302(j) ``may 
well define a legislative response to the policy considerations 
presented by the regulation of sources where the predominant emissions 
are fugitive in origin, particularly fugitive dust.'' 636 F.2d at 369. 
The court also noted that the provision ``gives EPA flexibility to 
provide industry-by-industry consideration and appropriate tailoring of 
coverage.'' Id. The EPA believes that the industry-specific coverage 
afforded by allowing sources in non-listed source categories to omit 
fugitive emissions in determining whether they are a ``major source'' 
is sufficient coverage for NSR purposes. As noted in the preceding 
paragraph, by omitting fugitive emissions in determining whether a non-
listed source is a major source, this significantly reduces the 
possibility that such a source of predominantly fugitive emissions 
would be considered major, accordingly limiting the possibility that 
future modifications at such a source would trigger major source NSR.
    To the extent that any sources are impacted by this rule, such 
sources will, by definition, be existing major stationary sources. In 
the specific context at issue here, these sources are likely to be 
large, relatively well-resourced operations, given that their emissions 
will necessarily generally exceed 250 tons per year for at least one 
pollutant even before considering fugitive emissions. Thus, although 
these major sources do not belong to a listed source category, they 
nonetheless represent the type of ``facilities, which, due to their 
size, are financially able to bear the substantial regulatory costs 
imposed by the PSD provisions and which . . . are primarily responsible 
for emissions of the deleterious pollutants that befoul our nation's 
air.'' \49\ If these facilities were constructed anew, they would be 
subject to the major NSR program (and, presumably, many if not most of 
these sources have already been through the major NSR permitting 
process). These sources should be familiar with the NSR program and 
able to manage any additional obligations imposed by this proposed 
regulatory change.
---------------------------------------------------------------------------

    \49\ Alabama Power, 636 F.2d at 353 (explaining Congress's 
intention in establishing the definition of ``major emitting 
facility'' and ``major stationary source'' for PSD purposes in CAA 
section 169(1)). As the court stated, ``the Act does not give the 
agency a free hand authority to grant broad exemptions. Though the 
costs of compliance with section 165 [PSD] requirements are 
substantial, they can reasonably be borne by facilities that 
actually emit, or would actually emit when operating at full 
capacity, the large tonnage thresholds [for major stationary 
sources] specified in section 169(1).'' Id. at 354.
---------------------------------------------------------------------------

    Accordingly, in light of these policy considerations and the legal 
constraints discussed in Section IV.C of this preamble, the EPA does 
not consider it necessary or prudent to extend a second, additional 
exemption to these existing major sources that are contemplating 
modifications, as the EPA did in the Fugitive Emissions Rule. Doing so 
would unnecessarily render future modifications less likely to trigger 
major NSR review, even in cases where a modification would 
significantly increase actual air pollution, frustrating the ultimate 
goals of the major NSR program (as discussed in Section V.A of this 
preamble). Overall, the EPA believes the interpretation and regulatory 
approach proposed in the current action strikes the appropriate balance 
to protect air quality while ensuring ``that economic growth will occur 
in a manner consistent with the preservation of existing clean air 
resources.'' 42 U.S.C. 7470(3).
    The EPA's proposed conclusions regarding the limited potential 
impact of this action are based on the agency's experience over the 
past 4 decades as well as feedback received from stakeholders on prior 
actions. However, the EPA solicits additional comments from 
stakeholders on the practical impact of the proposed action, including 
the scope of overall programmatic impacts (e.g., how many sources might 
be affected). Specifically, the EPA seeks information on the types and 
numbers of existing major sources that do not belong to a listed source 
category and that have predominantly fugitive emissions, or which might 
otherwise be affected by this rule. As

[[Page 62335]]

noted in the previous paragraphs, the EPA expects the number of such 
sources to be relatively small, but the EPA would welcome more 
quantitative information on this topic. Relatedly, the EPA solicits 
information about specific real-world or hypothetical examples of 
situations where a particular type of source might be affected by the 
proposed changes (e.g., how the changes might impact a regulated 
entity's behavior in considering whether to undertake a modification).

VI. SIP Minimum Program Elements

    If the EPA affirms the interpretation of CAA sections 302(j) and 
111(a)(4) discussed in Section IV.C of this preamble--i.e., that all 
existing major sources must account for fugitive emissions in 
determining whether a modification is major--the EPA proposes that the 
changes to the EPA regulations reflected in this rule would also be 
minimum program elements for SIPs. If this rule is finalized as 
proposed, it is likely that any SIPs containing an exemption for 
fugitive emissions in the major modification context will be less 
stringent than the minimum program elements specified in the EPA's 
regulations and would therefore need to be revised. The scope of 
necessary SIP revisions would be a case-specific inquiry and would 
depend on the nature of any final changes to the EPA's regulations as 
well as the nature of existing SIP provisions. Based on a preliminary 
review of existing EPA-approved SIPs, the EPA observes that very few 
state or local agencies have EPA-approved SIP provisions based on, or 
incorporating, the 2008 Fugitive Emissions Rule. This makes sense 
considering that the EPA stayed and amended the 2008 rule shortly after 
it became effective, leaving a relatively small window of time for 
states to adopt revisions based on the 2008 rule. However, the EPA 
understands that significantly more SIPs contain provisions based on, 
or incorporating, the 1980 exemption (as recodified in the 2002 NSR 
Reform Rule). Accordingly, if the EPA finalizes a rule that not only 
repeals the 2008 rule, but also removes the 1980 exemption from the 
EPA's regulations, a larger number of permitting authorities may be 
required to submit SIP revisions. If the EPA determines that conforming 
SIP revisions are necessary, states would be required to submit SIP 
revisions no later than three years after the final rule amending the 
EPA's regulations publishes in the Federal Register. 40 CFR 
51.166(a)(6)(i). The EPA is soliciting comment on the need to establish 
the proposed changes as minimum program elements and the consequent 
potential for SIP revisions.

VII. Definition of ``Fugitive Emissions''

    Fugitive emissions, for purposes of both the NSR and title V 
permitting programs, are defined as ``emissions which could not 
reasonably pass through a stack, chimney, vent, or other functionally 
equivalent opening.'' E.g., 40 CFR 52.21(b)(20), 70.2. The 2008 
Fugitive Emissions Rule did not change this regulatory definition, but 
the preamble to that rule did include a discussion of ``guiding 
principles'' based on the EPA's interpretation of this regulatory 
definition. See 73 FR 77891 (December 19, 2008). Most of the principles 
articulated in the 2008 preamble simply restated or summarized prior 
EPA letters and memoranda expressing the EPA's interpretations and 
policies on the issue.\50\ The EPA continues to follow its 
interpretations and policies concerning the definition of ``fugitive 
emissions'' that predated the 2008 rule, including those that were 
restated and summarized in the 2008 rule preamble. These positions were 
not affected by the 2008 rule or the stays of the 2008 rule. The EPA is 
providing the following summary of these interpretations and policies 
in order to provide clarity and certainty about how EPA intends to 
approach these issues.
---------------------------------------------------------------------------

    \50\ For examples of these prior guidance documents, please see 
the EPA's online NSR and title V guidance databases, each of which 
include a topic page containing guidance related specifically to 
fugitive emissions: https://www.epa.gov/nsr/new-source-review-policy-and-guidance-document-index and https://www.epa.gov/title-v-operating-permits/title-v-operating-permit-policy-and-guidance-document-index.
---------------------------------------------------------------------------

    Determining whether certain emissions are fugitive or non-fugitive 
at a particular source is inherently a fact-specific inquiry. All 
emissions which do actually pass through a stack, chimney, vent, or 
other functionally equivalent opening at a facility are non-fugitive. 
If emissions do not currently pass through such an opening, then one 
must evaluate whether such emissions could reasonably pass.\51\ The EPA 
interprets the phrase ``reasonably pass'' by determining whether 
emissions could reasonably be collected or captured and discharged 
through a stack, chimney, vent, or functionally equivalent opening. 
Various criteria guide this case-by-case analysis, and no single 
criterion should be considered determinative. Relevant considerations 
include whether and to what extent similar facilities collect or 
capture similar emissions (including how common this practice is, and 
whether the EPA has established a national emissions standard or 
regulation that requires some sources in the source category to collect 
or capture the emissions) and the technical and economic feasibility 
(e.g., cost) of collecting or capturing the emissions.
---------------------------------------------------------------------------

    \51\ When the EPA finalized the definition of ``fugitive 
emissions'' in the 1980 PSD rulemaking to include the words 
``reasonably pass,'' the agency explained that it did so in order to 
narrow the proposed definition of fugitive emissions to exclude not 
only those emissions that currently do pass through a stack, 
chimney, vent, or functionally equivalent opening, but also to those 
that do not currently pass but which could reasonably be made to 
pass through such an opening. The EPA explained: ``This change will 
ensure that sources will not discharge as fugitive emissions those 
emissions which would ordinarily be collected and discharged through 
stacks or other functionally equivalent openings, and will eliminate 
disincentives for the construction of ductwork and stacks for the 
collection of emissions.'' 45 FR 52693 (August 7, 1980).
---------------------------------------------------------------------------

    In addition to outlining these longstanding interpretations and 
policies, the preamble to the 2008 Fugitive Emissions Rule also 
expanded some of the factors that permitting authorities may consider 
when assessing whether certain emissions are fugitive or non-fugitive. 
Notably, the EPA said for the first time in the 2008 preamble that 
permitting authorities could consider the cost of controlling emissions 
when determining whether such emissions ``could not reasonably pass'' 
and accordingly whether such emissions should be considered fugitive or 
non-fugitive. The EPA understands that the stay of the 2008 rule left a 
question of whether EPA continued to support considering the cost of 
control in identifying whether emissions are fugitive. The EPA intended 
the initial 2009 stay (and all subsequent stays) of the 2008 Fugitive 
Emissions Rule to apply to the entire rulemaking effort, including the 
discussion of the definition of ``fugitive emissions'' contained within 
the rule's preamble. Thus, the EPA statements regarding the cost of 
control were also stayed and were not applied by EPA thereafter. 
Likewise, these statements regarding cost of control do not reflect the 
EPA's current thinking and should not be relied upon by states or 
sources in making permitting decisions. Instead, the EPA continues to 
apply the longstanding interpretations and policies that predated the 
2008 rule, as summarized in the preceding paragraphs.
    Although the EPA does not propose in this action to revise its 
longstanding approach for evaluating this issue, the EPA welcomes 
public comment on how to interpret and apply the definition of 
``fugitive emissions'' in the NSR and

[[Page 62336]]

title V regulations. To the extent that the EPA seeks to provide 
additional guidance on applying the definition of ``fugitive 
emissions'' in the future, any such guidance may be provided alongside, 
or separate from, any final action in this rulemaking concerning the 
treatment of fugitive emissions for major modifications. In the 
meantime, the EPA will continue to be responsive to case-specific 
inquiries from permitting authorities and regulated entities requesting 
the EPA's views on whether certain emissions should be considered 
fugitive or non-fugitive.

VIII. Environmental Justice Considerations

    The proposed changes are not expected to have any effect or 
increased burden on communities with environmental justice concerns. 
Although the impact of this proposal is expected to be limited, 
requiring all existing major sources to include fugitive emissions in 
determining whether a change constitutes a major modification could 
potentially result in more projects subject to major NSR and installing 
pollution controls, improving the air quality for all communities, 
particularly those located near major sources with a large proportion 
of fugitive emissions.

IX. Statutory and Executive Order Reviews

    Additional information about these statutes and Executive Orders 
can be found at https://www.epa.gov/laws-regulations/laws-and-executive-orders.

A. Executive Order 12866: Regulatory Planning and Review and Executive 
Order 13563: Improving Regulation and Regulatory Review

    This action is a significant regulatory action that was submitted 
to the Office of Management and Budget (OMB) for review. Pursuant to 
E.O. 12866, the EPA has assessed the potential costs and benefits of 
this regulatory action. EPA believes the rule will have a limited 
practical impact and result in limited increased burden for regulated 
entities, as discussed in Section V.D. Any changes made in response to 
OMB recommendations have been documented in the docket.

B. Paperwork Reduction Act (PRA)

    This action does not impose any new information collection burden 
under the PRA. OMB has previously approved the information collection 
activities contained in the existing regulations and has assigned OMB 
control numbers 2060-0003 for the PSD and NNSR permit programs. The 
burden associated with obtaining an NSR permit for a major stationary 
source undergoing a major modification is already accounted for under 
the approved information collection requests. A federal agency may not 
conduct or sponsor, and a person is not required to respond to, nor 
shall a person be subject to a penalty for failure to comply with, a 
collection of information subject to the requirements of the PRA unless 
that collection of information displays a currently valid OMB control 
number.

C. Regulatory Flexibility Act (RFA)

    I certify that this action will not have a significant economic 
impact on a substantial number of small entities under the RFA. This 
action will not impose any requirements on small entities. In general, 
major stationary sources undergoing major modifications are not small 
entities, as discussed in Section V of this preamble. State and local 
air agencies that could be affected by this rule do not qualify as 
small entities under the RFA.

D. Unfunded Mandates Reform Act (UMRA)

    This action does not contain an unfunded federal mandate as 
described in UMRA, 2 U.S.C. 1531-1538, and does not significantly or 
uniquely affect small governments. This action imposes no enforceable 
duty on any state, local or tribal governments or the private sector. 
Nonetheless, if this rule is finalized as proposed, it is possible that 
some state and local air agencies will need to submit a small, one-time 
revision to their SIP. However, the rule could ultimately reduce 
regulatory impacts for these state and local agencies (and potentially 
affected sources) because they would no longer have to expend resources 
differentiating between fugitive and non-fugitive emissions when 
assessing whether a project constitutes a major modification.

E. Executive Order 13132: Federalism

    This action does not have federalism implications. It will not 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.

F. Executive Order 13175: Consultation and Coordination With Indian 
Tribal Governments

    This action does not have tribal implications as specified in 
Executive Order 13175. The EPA is currently the reviewing authority for 
PSD and NNSR permits issued in tribal lands and, as such, the revisions 
being proposed will not impose direct burdens on tribal authorities. 
Thus, Executive Order 13175 does not apply to this action.

G. Executive Order 13045: Protection of Children From Environmental 
Health and Safety Risks

    The EPA interprets Executive Order 13045 as applying only to those 
regulatory actions that concern environmental health or safety risks 
that the EPA has reason to believe may disproportionately affect 
children, per the definition of ``covered regulatory action'' in 
section 2-202 of the Executive Order. This action is not subject to 
Executive Order 13045 because it does not concern an environmental 
health risk or safety risk.

H. Executive Order 13211: Actions Concerning Regulations That 
Significantly Affect Energy Supply, Distribution, or Use

    This action is not a ``significant energy action'' because it is 
not likely to have a significant adverse effect on the supply, 
distribution or use of energy. Industries directly involved in energy 
production (e.g., fossil fuel-fired power plants) will not be affected 
by this rule because they belong to a listed source category, and this 
rule only pertains to sources in non-listed source categories. As 
discussed in Section V of this preamble, the EPA considers it unlikely 
that this rule would affect other industries involved in energy supply 
that do not belong to a listed source category (e.g., surface coal 
mining).

I. National Technology Transfer and Advancement Act (NTTA)

    This rulemaking does not involve technical standards.

J. Executive Order 12898: Federal Actions To Address Environmental 
Justice in Minority Populations and Low-Income Populations

    The EPA believes that this action does not have disproportionately 
high and adverse human health or environmental effects on minority 
populations, low-income populations and/or indigenous peoples, as 
specified in Executive Order 12898 (59 FR 7629, February 16, 1994). The 
basis for this decision is contained in Section VIII of this preamble.

X. Statutory Authority

    The statutory authority for this action is provided by 42 U.S.C. 
7401 et seq.

List of Subjects

40 CFR Part 51

    Environmental protection, Administrative practice and procedure,

[[Page 62337]]

Air pollution control, Carbon monoxide, Fees, Intergovernmental 
relations, Lead, Nitrogen oxides, Ozone, Reporting and recordkeeping 
requirements, Sulfur oxides, Transportation, Volatile organic 
compounds.

40 CFR Part 52

    Environmental protection, Administrative practice and procedure, 
Air pollution control, Ammonia, Carbon monoxide, Greenhouse gases, 
Intergovernmental relations, Lead, Nitrogen dioxide, Nitrogen oxides, 
Ozone, Reporting and recordkeeping requirements, Sulfur dioxide, Sulfur 
oxides, Volatile organic compounds.

Michael S. Regan,
Administrator.

    For the reasons stated in the preamble, title 40, chapter I of the 
Code of Federal Regulations is proposed to be amended as follows:

PART 51--REQUIREMENTS FOR PREPARATION, ADOPTION, AND SUBMITTAL OF 
IMPLEMENTATION PLANS

0
1. The authority citation for part 51 continues to read as follows:

    Authority: 23 U.S.C. 101; 42 U.S.C. 7401-7671q.


Sec.  51.165  [Amended]

0
2. Amend Sec.  51.165 by:
0
a. Lifting the stay on paragraphs (a)(1)(v)(G) and (a)(1)(vi)(C)(3);
0
b. Removing paragraphs (a)(1)(v)(G) and (a)(1)(vi)(C)(3); and
0
c. Removing and reserving paragraph (a)(4).


Sec.  51.166  [Amended]

0
3. Amend Sec.  51.166 by:
0
a. Lifting the stay on paragraphs (b)(2)(v) and (b)(3)(iii)(d);
0
b. Removing paragraphs (b)(2)(v) and (b)(3)(iii)(d); and
0
c. Removing and reserving paragraph (i)(1)(ii).

Appendix S to Part 51 [Amended]

0
4. Amend appendix S to part 51 by:
0
a. Lifting the stay on paragraph II.A.5(vii);
0
b. Removing paragraph II.A.5(vii); and
0
c. Removing and reserving paragraph II.F.

PART 52--APPROVAL AND PROMULGATION OF IMPLEMENTATION PLANS

0
5. The authority citation for part 52 continues to read as follows:

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


Sec.  52.21  [Amended]

0
6. Amend Sec.  52.21 by:
0
a. Lifting the stay on paragraphs (b)(2)(v) and (b)(3)(iii)(c);
0
b. Removing paragraphs (b)(2)(v) and (b)(3)(iii)(c); and
0
c. Removing and reserving paragraph (i)(1)(vii).

[FR Doc. 2022-22259 Filed 10-13-22; 8:45 am]
BILLING CODE 6560-50-P