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Federal Register / Vol. 86, No. 87 / Friday, May 7, 2021 / Proposed Rules
facility-wide or system-wide averaging plans approved by PADEP under 25 Pa.
Code 129.98 including, but not limited to, any terms and conditions that ensure the enforceability of the averaging plan as a practical matter i.e., any monitoring, reporting, recordkeeping, or testing requirements; and 2 all sourcespecific RACT determinations approved by PADEP under 25 Pa. Code 129.99, including any alternative compliance schedules approved under 25 Pa. Code 129.97k and 129.99i; the case-by-case RACT determinations submitted to EPA
for approval into the SIP should include any terms and conditions that ensure the enforceability of the case-by-case or source-specific RACT emission limitation as a practical matter i.e., any monitoring, reporting, recordkeeping, or testing requirements. See 84 FR 20274
May 9, 2019. Through multiple submissions between 2017 and 2020, PADEP has submitted to EPA for approval various SIP submissions to implement its RACT II case-by-case
determinations and averaging plans.
This proposed rule is based on EPAs review of some of these SIP revisions.
II. Summary of SIP Revisions In order to satisfy a requirement from EPAs May 9, 2019 conditional approval, PADEP has submitted to EPA
SIP revisions addressing case-by-case RACT requirements for major sources in Pennsylvania subject to 25 Pa. Code 129.99. Among the submitted SIP
revisions were case-by-case RACT
determinations for sources in Allegheny County, which PADEP submitted on behalf of ACHD. As noted in Table 1, PADEPs May 9, 2020 submission to EPA included SIP revisions pertaining to ACHDs case-by-case NOX and/or VOC RACT determinations for sources at the ten facilities located in Allegheny County that are the subject of this rulemaking. PADEP, on behalf of ACHD, provided documentation in its SIP
revisions to support the case-by-case RACT determinations for affected
emission units at each source subject to 25 Pa. Code 129.99.
In the Pennsylvania RACT SIP
revisions, ACHD included a case-bycase RACT determination for the existing emissions units at each of these facilities that required a source specific NOX and/or VOC RACT determination.
In ACHDs RACT determinations an evaluation was completed to determine if previously SIP-approved, case-by-case RACT requirements herein referred to as RACT I were more stringent and required to be retained in the sources Title V air quality permit and subsequently, the Federally-approved SIP, or if the new case-by-case RACT
requirements are more stringent and replace the previous Federally-approved provisions.
EPA, in this action, is taking action on sources of NOX and/or VOC at ten facilities in Allegheny County, Pennsylvania, subject to Pennsylvanias case-by-case RACT requirements, as summarized in Table 2.

TABLE 2TEN MAJOR NOX AND/OR VOC SOURCES IN ALLEGHENY COUNTY, PENNSYLVANIA SUBJECT TO CASE-BY-CASE
RACT II UNDER THE 2008 8-HOUR OZONE NAAQS
1997 8-hour ozone RACT source?
RACT I

Major source Allegheny County Bellefield Boiler
Eastman Chemical Resins, Inc
Energy Center Northshore
Neville Chemical
Pittsburgh Allegheny County Thermal Ltd.Stanwix Street PACT.
PPG Industries Inc.Springdale
Universal Stainless & Alloy Products, Inc
U.S. Steel Mon Valley WorksClairton
U.S. Steel Mon Valley WorksEdgar Thomson
U.S. Steel Mon Valley WorksIrvin

The case-by-case RACT
determinations submitted by PADEP, on behalf of ACHD, consist of an evaluation of all reasonably available controls at the time of evaluation for each affected emissions unit, resulting in an ACHD
determination of what specific control requirements, if any, satisfy RACT for that particular unit. The adoption of new or additional controls or the revisions to existing controls as RACT
were specified as requirements in new or revised Federally enforceable permits hereafter RACT II permits issued by ACHD to the source. The RACT II
permits, which revise or adopt additional source-specific requirements, have been submitted as part of the Pennsylvania RACT SIP revisions for EPAs approval in the Pennsylvania SIP
under 40 CFR 52.2020d1. The RACT
II permits submitted by PADEP, on behalf of ACHD, are listed in the last
VerDate Sep<11>2014

17:32 May 06, 2021

Jkt 253001

Major source pollutant NOX and/or VOC

Yes Yes Yes Yes Yes

NOX
VOC
NOX
VOC
NOX

0047I003a 11/30/20.
0058I026a 9/30/20.
0022I003a 11/30/20.
0060d 11/10/20.
0044I001a 11/30/20.

Yes Yes Yes Yes Yes

VOC
NOX
VOC
VOC
VOC

and NOX
and NOX
and NOX

0057OP18a 2/28/20.
0027a 2/20/20.
0052I020a 12/7/20.
0051I008a 12/7/20.
0050OP16c 12/7/20.

column of Table 2 of this document, along with the permit effective date, and are part of the docket for this rulemaking, which is available online at https www.regulations.gov, Docket No.
EPAR03OAR20200575.9 EPA is proposing to incorporate by reference in the Pennsylvania SIP, via the RACT II
permits, source-specific RACT
determinations under the 2008 8-hour ozone NAAQS for certain major sources of NOX and VOC emissions in Allegheny County.
III. EPAs Evaluation of SIP Revisions After thorough review and evaluation of the information provided by PADEP, on behalf of ACHD, in its SIP revision 9 The RACT II permits are redacted versions of a facilitys Federally enforceable permits and reflect the specific RACT requirements being approved into the Pennsylvania SIP.

PO 00000

Frm 00056

RACT II permit effective date
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submittals for 10 major sources of NOX
and/or VOC in Allegheny County, EPA
finds that ACHDs case-by-case RACT
determinations and conclusions provided are reasonable and appropriately considered technically and economically feasible controls, while setting lowest achievable limits.
EPA finds that the proposed sourcespecific RACT controls for the sources subject to this rulemaking action adequately meet the CAA RACT
requirements for the 2008 8-hour ozone NAAQS for the major sources of NOX
and/or VOC in Pennsylvania, as they are not covered by or cannot meet Pennsylvanias presumptive RACT
regulation.
EPA also finds that all the proposed revisions to previously SIP approved RACT requirements, under the 1997
8-hour ozone standard RACT I, as discussed in ACHDs SIP revisions, will
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