[Federal Register Volume 89, Number 29 (Monday, February 12, 2024)]
[Proposed Rules]
[Pages 9815-9819]
From the Federal Register Online via the Government Publishing Office [www.gpo.gov]
[FR Doc No: 2024-02834]
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ENVIRONMENTAL PROTECTION AGENCY
40 CFR Part 81
[EPA-R03-OAR-2023-0419; FRL-11736-01-R3]
Redesignation of Portions of Westmoreland and Cambria Counties,
Pennsylvania for the 2010 Sulfur Dioxide (SO2) National Ambient Air
Quality Standards (NAAQS): Notification of Availability and Public
Comment Period
AGENCY: Environmental Protection Agency (EPA).
ACTION: Notice of availability and public comment period.
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SUMMARY: The Environmental Protection Agency (EPA or the Agency) is
providing notice of our intent to redesignate portions of Westmoreland
County and Cambria County, Pennsylvania, to ``nonattainment'' for the
2010 sulfur dioxide (SO2) national ambient air quality
standard (NAAQS or standard). Westmoreland County is currently
designated ``attainment/unclassifiable,'' and Cambria County is
currently designated ``unclassifiable.'' EPA's intended redesignation
of portions of these counties is based on modeled violations of the
2010 SO2 NAAQS. If the redesignation to nonattainment is
finalized, the Commonwealth of Pennsylvania would be required to
undertake certain planning requirements to reduce SO2
concentrations within this area, including, but not limited to, the
requirement to submit within 18 months of redesignation a revision to
the Pennsylvania state implementation plan (SIP) that provides for
attainment of the SO2 standard as expeditiously as
practicable, but no later than five years after the date of
redesignation to nonattainment.
Notice is hereby given that EPA has posted on our public electronic
docket and internet website the intended redesignation for relevant
portions of Westmoreland and Cambria counties, Pennsylvania under the
2010 SO2 NAAQS. The Agency invites the public to review and
provide input on our intended redesignation during the comment period
specified in the DATES section. EPA notified the Commonwealth of
Pennsylvania of our intended redesignation action via a letter to the
Governor on or about February 17, 2023, which is included in the docket
for this notice of availability (NOA).
DATES: Comments must be received on or before March 28, 2024. Please
refer to
[[Page 9816]]
the SUPPLEMENTARY INFORMATION section for additional information on the
comment period.
ADDRESSES: Submit your comments, identified by Docket ID No. EPA-R03-
OAR-2023-0419 at www.regulations.gov or via email to
[email protected]. For comments submitted at Regulations.gov, follow
the online instructions for submitting comments. Once submitted,
comments cannot be edited or removed from Regulations.gov. For either
manner of submission, EPA may publish any comment received to its
public docket. Do not submit electronically any information you
consider to be confidential business information (CBI) or other
information whose disclosure is restricted by statute. 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. 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, please contact the person
identified in the FOR FURTHER INFORMATION CONTACT section. For the full
EPA public comment policy, information about CBI or multimedia
submissions, and general guidance on making effective comments, please
visit www.epa.gov/dockets/commenting-epa-dockets.
FOR FURTHER INFORMATION CONTACT: For general questions concerning this
action, please contact Ellen Schmitt, Planning & Implementation Branch
(3AD30), Air & Radiation Division, U.S. Environmental Protection
Agency, Region III, 1600 John F. Kennedy Boulevard, Philadelphia,
Pennsylvania 19103. The telephone number is (215) 814-5787. Ms. Schmitt
can also be reached via electronic mail at [email protected].
EPA encourages the public to review our letter notifying
Pennsylvania of our intended redesignation action, and the associated
area-specific technical support information at www.epa.gov/sulfur-dioxide-designations/sulfur-dioxide-designations-regulatory-actions or
in the public docket for this intended redesignation at
www.regulations.gov under Docket ID No. EPA-R03-OAR-2023-0419.
SUPPLEMENTARY INFORMATION:
The information in this document is organized as follows:
I. Purpose of Action and Instructions for Submitting Public Comments
II. The 2010 SO2 NAAQS
III. Designations for the 2010 SO2 NAAQS
IV. SO2 Monitoring and Modeling Considerations
V. Modeled SO2 NAAQS Violations in Westmoreland and
Cambria Counties, Pennsylvania
VI. EPA's Intended Decision To Address Modeled SO2 NAAQS
Violations in Portions of Westmoreland and Cambria Counties,
Pennsylvania Through Redesignation
I. Purpose of Action and Instructions for Submitting Public Comments
The purpose of this NOA is to solicit input from interested parties
on EPA's notification to the Governor of Pennsylvania about our intent
and rationale for redesignating portions of Westmoreland and Cambria
counties in Pennsylvania to nonattainment for the 2010 SO2
NAAQS. EPA's notification letter and the supporting technical analysis
can be found at www.epa.gov/sulfur-dioxide-designations/sulfur-dioxide-designations-regulatory-actions, as well as in the public docket for
this redesignation at www.regulations.gov under Docket ID No. EPA-R03-
OAR-2023-0419.
EPA invites public input regarding the redesignation of portions of
Westmoreland and Cambria counties during the 45-day comment period
provided in this document. To receive full consideration, input from
the public must be submitted to the docket by March 28, 2024. This
publication and opportunity for public comment does not affect any
rights or obligations of any state, or tribe, or of EPA, which might
otherwise exist pursuant to the Clean Air Act (CAA or Act) section
107(d).
CAA section 107(d)(3) provides a process for air quality
redesignations that involves recommendations by affected states,
territories, and tribes to EPA and responses from the Agency to those
parties, prior to EPA promulgating final area redesignation decisions.
The Agency is not required under CAA section 107(d)(3) to seek public
comment during the redesignations process, but we are electing to do so
for these counties with respect to the 2010 SO2 NAAQS to
gather additional information for EPA to consider before making a final
redesignation decision for these specific areas.
A. Submitting CBI
Do not submit CBI information to EPA through www.regulations.gov or
email. Clearly mark the part or all of the information that you claim
to be CBI. For CBI on a disk or CD-ROM that you mail to EPA, mark the
outside of the disk or CD-ROM as CBI and then identify electronically
within the disk or CD-ROM the specific information that is claimed as
CBI. In addition to one complete version of the comment that includes
information claimed as CBI, a copy of the comment that does not contain
the information claimed as CBI must be submitted for inclusion in the
public docket. Information so marked will not be disclosed except in
accordance with procedures set forth in 40 Code of Federal Regulations
(CFR) part 2. For additional directions on sending or delivering
information identified as CBI, contact the person identified in the FOR
FURTHER INFORMATION CONTACT section.
B. Tips for Preparing Your Comments
When submitting comments, remember to:
Identify the rulemaking by docket number and other
identifying information (subject heading, Federal Register date and
page number).
Follow directions.
Explain why you agree or disagree; suggest alternatives
and substitute language for your requested changes.
II. The 2010 SO2 NAAQS
Under section 109 of the CAA, EPA has established primary and
secondary NAAQS for certain pervasive air pollutants (referred to as
``criteria pollutants'') and conducts periodic reviews of the NAAQS to
determine whether they should be revised or whether new NAAQS should be
established. The primary NAAQS represent ambient air quality standards,
the attainment and maintenance of which EPA has determined, including a
margin of safety, are requisite to protect the public health. The
secondary NAAQS represent ambient air quality standards, the attainment
and maintenance of which EPA has determined are requisite to protect
the public welfare from any known or anticipated adverse effects
associated with the presence of such air pollutant in the ambient air.
EPA revised the primary SO2 NAAQS in a final rule
published in the Federal Register on June 22, 2010 (75 FR 35520),
codified at 40 CFR 50.17, which became effective on August 23, 2010.
Based on review of the air quality criteria for oxides of sulfur and
the primary NAAQS for oxides of sulfur as measured by SO2,
EPA revised the primary SO2 NAAQS to provide the requisite
protection of public health with an adequate margin of safety.
Specifically, EPA established a new 1-hour SO2 standard at a
level of 75 parts per billion (ppb), which is met at an ambient air
quality monitoring site (or in the case of dispersion modeling, at an
ambient air
[[Page 9817]]
quality receptor location) when the 3-year average of the annual 99th
percentile of daily maximum 1-hour average concentrations is less than
or equal to 75 ppb, as determined in accordance with appendix T of 40
CFR part 50. 40 CFR 50.17(a) and (b).
Anthropogenic SO2 emissions originate chiefly from point
sources, with fossil fuel combustion at electric utilities and other
industrial facilities accounting for the majority of total
emissions.\1\ Current scientific evidence links short-term exposures to
SO2, ranging from five minutes to 24 hours, with an array of
adverse respiratory effects including bronchoconstriction and increased
asthma symptoms.\2\ These effects are particularly important for
asthmatics at elevated ventilation rates (e.g., while exercising or
playing).\3\ Studies also show a connection between short-term exposure
and increased visits to emergency departments and hospital admissions
for respiratory illnesses, particularly in at-risk populations
including children, the elderly and asthmatics.\4\
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\1\ 75 FR 35520 (June 22, 2010).
\2\ Id.
\3\ Id.
\4\ Id.
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III. Designations for the 2010 SO2 NAAQS
EPA is required by CAA section 107(d) to designate all areas
throughout the nation as attaining or not attaining the NAAQS within
two years of the promulgation of any new or revised NAAQS. Pursuant to
CAA section 107(d), EPA must designate as ``nonattainment'' those areas
that violate the NAAQS and those nearby areas that contribute to
violations. Once an area has been designated, the EPA Administrator,
under CAA section 107(d)(3), may at any time notify a state that a
designation should be revised.
EPA was required to designate areas throughout the country for the
2010 SO2 NAAQS by June 3, 2012. EPA invoked a 1-year
extension of the deadline to designate areas for the 2010
SO2 NAAQS, as provided for under CAA section 107, after
which the Agency completed an initial round of SO2
designations for certain areas of the country on August 5, 2013
(referred to as ``Round 1'').\5\ In Round 1, EPA designated Indiana
County and a portion of Armstrong County, Pennsylvania as nonattainment
(hereafter referred to as the ``Indiana Area''). On January 9, 2018,\6\
in a subsequent round of designations (Round 3), EPA designated
Westmoreland County, Pennsylvania as attainment/unclassifiable, and
Cambria County, Pennsylvania as unclassifiable.
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\5\ 78 FR 47191. Effective date October 4, 2013.
\6\ 83 FR 1098. Effective date April 9, 2018.
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In 2018, during the public comment period for the proposed approval
of the SO2 attainment SIP for the Indiana Area (83 FR 32606,
July 13, 2018), the Sierra Club (in conjunction with the National Parks
Conservation Association (NPCA), PennFuture, Earthjustice, and Clean
Air Council (the Council)) submitted a modeling analysis which claimed
to show violations of the SO2 NAAQS within portions of
Westmoreland and Cambria counties due to SO2 emissions from
sources located within the Indiana Area. In 2022, during the public
comment period for the proposed partial disapproval and partial
approval of the Indiana Area's attainment SIP (87 FR 15166, March 17,
2022), EPA received additional modeling from the Sierra Club, and
Keystone-Conemaugh Projects, LLC (KEY-CON),\7\ focused on the
Westmoreland and Cambria areas. EPA also conducted its own modeling of
those areas. Based on review of all modeling analyses, EPA has
determined that there are modeled SO2 NAAQS violations
outside of the existing Indiana Area, in portions of Westmoreland and
Cambria counties, and accordingly notified the Governor of Pennsylvania
in a letter dated February 17, 2023, of its intent to redesignate the
relevant portions of Westmoreland and Cambria counties as nonattainment
for the 2010 SO2 NAAQS, consistent with CAA section
107(d)(3)(A). On June 22, 2023, Acting Secretary for the Pennsylvania
Department of Environmental Protection (PA DEP), Richard Negrin,
responded to EPA's letter but did not specify whether the Commonwealth
agreed or disagreed with EPA's determination to redesignate portions of
Westmoreland and Cambria counties as nonattainment for the 2010
SO2 NAAQS. Instead, Pennsylvania's response included several
comments questioning certain aspects of the Technical Support Document
(TSD) that EPA had developed and submitted to PA DEP with the February
17, 2023 redesignation letter. EPA has responded to the Commonwealth's
comments in a response to comments (RTC) document which is in the
docket for this document.\8\
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\7\ KEY-CON, licensee for the Keystone Generating Station
located in Armstrong County and the Conemaugh Generating station
located in Indiana County, provided modeling to support its comments
rebutting modeling and views presented by the Sierra Club and EPA.
\8\ A copy of PA DEP's comments on EPA's initial redesignation
TSD and also EPA's RTC replying to these comments, can be found in
Docket No. EPA-R03-OAR-2023-0419 via www.regulations.gov.
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IV. SO2 Monitoring and Modeling Considerations
The 1-hour primary SO2 standard is violated at an
ambient air quality monitoring site (or in the case of dispersion
modeling, at an ambient air quality receptor location) when the 3-year
average of the annual 99th percentile of the daily maximum 1-hour
average concentrations exceeds 75 ppb, as determined in accordance with
appendix T of 40 CFR part 50. EPA also believes that in certain cases,
including when SO2 monitors are lacking, air dispersion
modeling is an appropriate tool to determine whether an area is in
attainment, as discussed in EPA's document titled, ``SO2
NAAQS Designations Modeling Technical Assistance Document'' (Modeling
TAD). The Modeling TAD provides nonbinding recommendations on how to
appropriately and sufficiently model ambient air in proximity to an
SO2 emission source to establish air quality data for
comparison to the 2010 primary SO2 NAAQS for the purposes of
designations.
Ambient SO2 monitoring data are collected by state,
local, and tribal monitoring agencies (``monitoring agencies'') in
accordance with the monitoring requirements contained in 40 CFR parts
50, 53, and 58. A monitoring network is generally designed to measure,
report, and provide related information on air quality data as
described in 40 CFR part 58. To ensure that the data from the network
is accurate and reliable, the monitors in the network must meet a
number of requirements, including the use of monitoring methods that
EPA has approved as Federal Reference Methods (FRMs) or Federal
Equivalent Methods (FEMs), focusing on particular monitoring
objectives, and following specific siting criteria, data reporting,
quality assurance and data handling rules or procedures.
At present, except for SO2 monitoring required at
National Core Monitoring Stations (Ncore stations), there are no
minimum monitoring requirements for SO2 in 40 CFR part 58
appendix D, other than a requirement for EPA Regional Administrator
approval before removing any existing monitors and a requirement that
any ongoing SO2 monitoring must have at least one monitor
sited to measure the maximum concentration of SO2 in that
area.
In addition to using any valid data generated by existing monitors,
refined dispersion modeling may inform NAAQS designation and
[[Page 9818]]
implementation decisions regarding sources that may have the potential
to cause or contribute to a NAAQS violation. For a short-term 1-hour
standard, dispersion modeling of stationary sources can be more
technically appropriate, efficient, and effective because it accounts
for fairly infrequent combinations of meteorological and source
operating conditions that can contribute to peak ground-level
concentrations of SO2.
EPA's Guideline on Air Quality Models, found at appendix W to 40
CFR part 51, provides recommendations on modeling techniques and
guidance for estimating pollutant concentrations to assess control
strategies and determine emission limits.
V. Modeled SO2 NAAQS Violations in Westmoreland and Cambria Counties,
Pennsylvania
Effective on October 4, 2013, the Indiana Area (which encompasses
Indiana County, as well as Plumcreek Township, South Bend Township and
Eldertown Borough of Armstrong County) was designated as nonattainment
for the 2010 SO2 NAAQS. The Indiana Area includes Keystone,
Conemaugh, Homer City, and Seward electric generating units (EGUs), all
primary SO2 emitting sources.
On October 11, 2017, PA DEP submitted to EPA an attainment SIP for
the Indiana Area which the Agency proposed approval of on July 13, 2018
(83 FR 32606). During the public comment period for the proposed
approval of the attainment SIP, the Sierra Club (in conjunction with
the NPCA, PennFuture, Earthjustice, and the Council) submitted a
modeling analysis using actual emissions and the critical emission
values (CEVs) \9\ for Conemaugh and Seward which claimed to show
violations of the SO2 NAAQS outside of the Indiana Area,
beyond the eastern border of Indiana County, within nearby portions of
Westmoreland and Cambria counties. The modeling used the same
meteorological data, stack parameters, background concentrations and
building downwash as Pennsylvania's attainment SIP for the Indiana
Area. The Sierra Club modeling used emission inputs of actual
historical emissions (2013-2018 quarter 1) and a finer receptor grid
that included receptors outside Indiana County. When modeling 2015-2017
emissions, the resulting design value was 293.4 micrograms per cubic
meter (ug/m\3\), and when modeling 2013-2017 emissions, the resulting
design value was 267.2 ug/m\3\.\10\
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\9\ A CEV is the maximum modeled emission rate that results in
attainment.
\10\ EPA considers 196.4 ug/m\3\ equivalent to 75 ppb (based on
the 2010 SO2 NAAQS).
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EPA issued a final approval of Pennsylvania's attainment plan for
the Indiana Area on October 19, 2020 (85 FR 66240). On December 18,
2020, the Sierra Club, Clean Air Council, and PennFuture filed a
petition for judicial review with the U.S. Court of Appeals for the
Third Circuit, challenging EPA's final approval of the Indiana Area's
attainment plan.\11\ On April 5, 2021, EPA filed a motion for voluntary
remand without vacatur of its approval of the Indiana Area attainment
plan in order to reconsider its approval of the attainment plan.
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\11\ Sierra Club, et. al. v. EPA, Case No. 20-3568 (3rd Cir.).
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On August 17, 2021, the U.S. Court of Appeals for the Third Circuit
granted EPA's request for remand without vacatur of the final approval
of Pennsylvania's 2010 SO2 NAAQS attainment plan for the
Indiana Area, requiring that the Agency take final action in response
to the remand no later than one year from the date of the court's order
(i.e., by August 18, 2022).
After reconsideration, on March 17, 2022, EPA proposed partial
disapproval and partial approval of the Indiana Area attainment plan
(87 FR 15166). During the public comment period, EPA received air
quality modeling (including modeling files) from the Sierra Club (in
conjunction with the NPCA, PennFuture, Earthjustice, and the Council)
using updated emissions data claiming to show modeled NAAQS violations
in Westmoreland and Cambria counties due to SO2 emissions
from the Conemaugh and Seward sources located in Indiana County. EPA
also received an air quality modeling report from KEYCON which used
updated emissions from Conemaugh and Seward but did not show modeled
NAAQS violations in Westmoreland and Cambria counties.\12\
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\12\ KEYCON emailed the modeling files to EPA on April 20, 2022.
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EPA then conducted its own modeling analysis, discussed in detail
in the TSD located in the docket for this document. Based on review of
all modeling analyses, EPA determined that there are modeled
SO2 NAAQS violations outside of the existing Indiana Area,
in Westmoreland and Cambria counties.
VI. EPA's Intended Decision To Address Modeled SO2 NAAQS Violations in
Portions of Westmoreland and Cambria Counties, Pennsylvania Through
Redesignation
The CAA provides EPA with the authority to revise designations of,
or ``redesignate,'' areas under CAA section 107(d)(3). Such
redesignations can originate as requests by states (per CAA section
107(d)(3)(D)), and EPA can also notify a state at any time that a
designation of any area or portion of an area should be revised, on the
basis of air quality data, planning and control considerations, or any
other air quality-related considerations the EPA Administrator deems
appropriate. CAA section 107(d)(3)(A) further states that, ``[i]n
issuing such notification, which shall be public, to the Governor, the
Administrator shall provide such information as the Administrator may
have available explaining the basis for the notice.'' The Act then
requires the Governor to submit to EPA such redesignation, if any, as
the Governor deems appropriate (CAA section 107(d)(3)(B)). CAA section
107(d)(3)(C) states that ``the Administrator shall promulgate the
redesignation, if any, of the area or portion thereof, submitted by the
Governor in accordance with [CAA section 107(d)(3)(B)], making such
modifications as the Administrator may deem necessary . . . . If the
Governor does not submit, in accordance with [CAA section
107(d)(3)(B)], a redesignation for an area (or portion thereof)
identified by the Administrator under [CAA section 107(d)(3)(A)], the
Administrator shall promulgate such redesignation, if any, that the
Administrator deems appropriate.''
As noted, CAA section 107(d)(3)(A) provides EPA latitude to
consider a broad range of information in considering whether a
designation should be revised. In consideration of ``air quality data,
planning and control considerations, or any other air quality-related
considerations the EPA Administrator deems appropriate,'' EPA has taken
note of the analytical guidance that it has previously used in issuing
initial area designations under CAA section 107(d)(1). EPA has issued
multiple guidance documents for performing SO2 designations,
the most recent of which is a September 5, 2019 guidance from Peter
Tsirigotis, Director, U.S. EPA, Office of Air Quality Planning and
Standards, to Regional Air Division Directors, U.S. EPA Regions 1-
10.\13\
[[Page 9819]]
This memorandum supplements, where necessary, prior designations
guidance documents on area designations for the 2010 primary
SO2 NAAQS issued on March 24, 2011, March 20, 2015, and July
22, 2016. The September 2019 memorandum identifies evaluation factors
in determining whether areas are in violation of the 2010
SO2 NAAQS and factors that EPA intends to assess in
determining the boundaries for such areas. These factors include:
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\13\ See, ``Area Designations for the 2010 Primary Sulfur
Dioxide National Ambient Air Quality Standard--Round 4,'' memorandum
to Regional Air Division Directors, Regions 1-10, from Peter
Tsirigotis, dated September 5, 2019, available at www.epa.gov/sites/default/files/2019-09/documents/round_4_so2_designations_memo_09-05-2019_final.pdf.
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(1) Air quality characterization via ambient monitoring or
dispersion modeling results;
(2) emissions-related data;
(3) meteorology;
(4) geography and topography; and
(5) jurisdictional boundaries.
Available modeling indicates that portions of Westmoreland and
Cambria counties are violating the 2010 1-hour SO2 NAAQS.
EPA's detailed evaluation of the modeled violations, contributing
sources, and intended area boundaries based on the weight of evidence
of the previously identified factors are included in the TSD, which is
located in the docket for this action. EPA's intended boundaries of the
relevant area encompass Lower Yoder Township in Cambria County,
Pennsylvania and St. Clair Township, Seward Borough, and New Florence
Borough in Westmoreland County, Pennsylvania. A map showing the
boundaries of our intended nonattainment area for Westmoreland and
Cambria counties is included in the TSD.
With respect to area boundaries, EPA's modeling shows that the
sources of this nonattainment are SO2 emissions from the
Conemaugh and Seward plants, which are located in the existing Indiana,
Pennsylvania nonattainment area. The attainment plan for the Indiana
Area was partially disapproved and partially approved. This initiated a
sanctions clock under CAA section 179, providing for emission offset
sanctions for new sources unless Pennsylvania submits, and EPA fully
approves, a revised attainment SIP for the Indiana Area within 18
months after the Agency's final partial disapproval, and providing for
highway funding sanctions if EPA has not fully approved a revised plan
within six months thereafter. Due to this unique situation and the
already determined attainment planning schedule for the Indiana Area,
EPA has decided not to add the proposed Westmoreland and Cambria
nonattainment area into the existing Indiana Area. EPA maintains that
under the circumstances presented here, a new nonattainment area that
does not include the contributing sources is not an impediment to the
Commonwealth's ability to impose new emission limits on the sources
contributing to the air quality violations in the nonattainment area.
In any future attainment plan submitted for this new area, Pennsylvania
will need to demonstrate that any future emissions or new emission
limits for Seward and Conemaugh are sufficient to provide for NAAQS
attainment in both areas as a result of this redesignation. A
discussion of the intended boundaries for the Westmoreland and Cambria
nonattainment area is located in the TSD associated with this
redesignation document. The TSD can be found at www.regulations.gov in
Docket ID No. EPA-R03-OAR-2023-0419. Based on this information, EPA
notified the Governor of Pennsylvania, in a letter dated February 17,
2023, of EPA's intention to redesignate portions of Westmoreland and
Cambria counties to nonattainment. On June 22, 2023, Acting Secretary
for the PA DEP, Richard Negrin, responded to EPA's letter but did not
specify whether it agreed or disagreed with EPA's determination to
redesignate portions of Westmoreland and Cambria counties as
nonattainment for the 2010 SO2 NAAQS. Instead,
Pennsylvania's response included several comments questioning certain
aspects of the TSD that EPA had developed and submitted to PA DEP with
the February 17, 2023 redesignation letter. EPA has responded to the
Commonwealth's comments in a RTC document which is in the docket for
this action.\14\
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\14\ A copy of PA DEP's comments on EPA's initial redesignation
TSD and also EPA's RTC replying to these comments, can be found in
Docket No. EPA-R03-OAR-2023-0419 via www.regulations.gov.
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Through this action, EPA is providing notice of our intent to
redesignate portions of Westmoreland and Cambria counties to
nonattainment for the 2010 SO2 NAAQS. The Agency is
voluntarily taking public comment on the intended redesignation, TSD,
and our response to PA DEP's June 27, 2023 comments. Public comment
information is located in section I of this document. Per CAA section
107(d)(3)(C), EPA intends to promulgate a redesignation, if any, after
considering any further information obtained during the comment period.
Adam Ortiz,
Regional Administrator, Region III.
[FR Doc. 2024-02834 Filed 2-9-24; 8:45 am]
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