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Federal Register / Vol. 86, No. 208 / Monday, November 1, 2021 / Rules and Regulations subject to 25 Pa. Code 129.98 or 129.99.
Among the Pennsylvania SIP revisions submitted by PADEP were case-by-case RACT determinations and alternative NOX emissions limits for certain sources in Philadelphia County, which PADEP
submitted on behalf of AMS. PADEPs submission included SIP revisions pertaining to source-specific RACT
requirements for the existing emissions units at each of the major sources of NOX and/or VOC that required a sourcespecific RACT determination or alternative NOX emissions limits for major sources seeking such limits.
In the case-by-case RACT
determinations submitted by PADEP on behalf of AMS, an evaluation was
completed to determine if previously SIP-approved, case-by-case RACT
emissions limits or operational controls were more stringent than the new RACT
II presumptive or case-by-case requirements. If more stringent, the previously approved RACT
requirements will continue to apply to the applicable source and are included in the new RACT II permit. If the new case-by-case RACT II requirements are more stringent than the previously approved RACT requirements, then the RACT II requirements will supersede the prior RACT requirements.3
In AMS RACT determinations involving NOX averaging, an evaluation was completed to determine that the
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aggregate NOX emissions emitted by the air contamination sources included in the facility-wide or system-wide NOX
emissions averaging plan using a 30-day rolling average are not greater than the NOX emissions that would be emitted by the group of included sources if each source complied with the applicable presumptive limitation in 25 Pa. Code 129.97 on a source-specific basis.
Here, EPA is approving SIP revisions pertaining to case-by-case RACT
requirements and alternative NOX
emissions limits for sources at nine major NOX and/or VOC emitting facilities in Philadelphia County, as summarized in Table 1 in this document.

TABLE 1NINE MAJOR NOX AND/OR VOC EMITTING FACILITIES IN PENNSYLVANIA SUBJECT TO SOURCE-SPECIFIC RACT
II DETERMINATIONS UNDER THE 2008 8-HOUR OZONE NAAQS
Major source county
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AdvanSix Resins & Chemicals LLCFrankford Plant formerly Honeywell InternationalFrankford Plant.
Exelon Generation CompanyRichmond Generating Station
Grays Ferry Cogeneration PartnershipSchuylkill Station
Vicinity Energy PhiladelphiaSchuylkill Station formerly Veolia Energy PhiladelphiaSchuylkill Station.
Kinder Morgan Liquids Terminals, LLCPhiladelphia Terminal
Naval Surface Warfare CenterPhiladelphia Division formerly Naval Surface Warfare CenterCarderock Division, Ship Systems Engineering Station.
Newman and Company, Inc formerly Paperworks Industries, Inc
Philadelphia Energy Solutions Refining and Marketing LLC
Philadelphia Shipyard Inc

1997 8-hour ozone RACT
source?
RACT I

Major source pollutant NOX and/or VOC

Yes

NOX and VOC

IP16000276 3/5/2020.

Yes
Yes
Yes

NOX
NOX
NOX

IP16000246 4/20/2020.
IP16000250 3/4/2020.
IP16000249 3/4/2020.

Yes
Yes

VOC
NOX

IP16000233 4/20/2020.
IP16000235 3/20/2020.

Yes
Yes
No

NOX
NOX and VOC
VOC

IP000223 3/31/2020.
IP1600269 4/24/2020.
IP16000300 4/8/2020.

The case-by-case RACT
determinations submitted by PADEP, on behalf of AMS, consist of an evaluation of all reasonably available controls at the time of evaluation for each affected emissions unit, resulting in an AMS
determination of what specific emissions limit or control measures satisfy RACT for that particular unit.
The adoption of new, additional, or revised emissions limits or control measures to existing SIP-approved RACT I requirements were specified as requirements in new or revised federally enforceable permits hereafter RACT II
permits issued by AMS to the source.
Similarly, AMS determinations of alternative NOX emissions limits are included in RACT II permits. These RACT II permits have been submitted as part of the Pennsylvania RACT SIP
revisions for EPAs approval into the Pennsylvania SIP under 40 CFR
52.2020d1. The RACT II permits
submitted by PADEP are listed in the last column of Table 1 of this preamble, along with the permit effective date, and are part of the docket for this rule, which is available online at https
www.regulations.gov, Docket No. EPA
R03OAR20190657.4 EPA is incorporating by reference in the Pennsylvania SIP, via the RACT II
permits, source-specific RACT
emissions limits and control measures and alternative NOX emissions limits under the 2008 8-hour ozone NAAQS
for certain major sources of NOX and VOC emissions.

3 While the prior SIP-approved RACT permit will remain part of the SIP, this RACT II rule will incorporate by reference the RACT II requirements through the RACT II permit, which will also
contain any more stringent requirements from the previously approved RACT permit.
4 The RACT II permits included in the docket for this rule are redacted versions of the facilities
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B. EPAs Final Action PADEPs SIP revisions incorporate AMS determinations of source-specific RACT II controls for individual emission units at major sources of NOX
and/or VOC in Philadelphia, where those units are not covered by or cannot meet Pennsylvanias presumptive RACT

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RACT II permit effective date
regulation or where included in a NOX
averaging plan. After thorough review and evaluation of the information provided by AMS in the SIP revision submittals for sources at nine major NOX and/or VOC emitting facilities in Philadelphia, EPA found that: 1 AMS
case-by-case RACT determinations and conclusions establish limits and/or controls on individual sources that are reasonable and appropriately considered technically and economically feasible controls, 2 AMS
determinations on alternative NOX
emissions limits demonstrate that emissions under the averaging plan are equivalent to emissions if the individual sources were operating in accordance with the applicable presumptive limit, and 3 AMS determinations are consistent with the CAA, EPA
regulations, and applicable EPA
guidance.
federally enforceable permits. They reflect the specific RACT requirements being approved into the Pennsylvania SIP via this final action.

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