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Federal Register / Vol. 86, No. 25 / Tuesday, February 9, 2021 / Proposed Rules
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
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commenting-epa-dockets.

Mr.
Riley Burger, Permits Branch 3AD10, Air and Radiation Division, U.S.
Environmental Protection Agency, Region III, 1650 Arch Street, Philadelphia, Pennsylvania 19103. The telephone number is 215 814 2217. Mr.
Burger can also be reached via electronic mail at burger.riley@epa.gov.

FOR FURTHER INFORMATION CONTACT:

On May 7, 2020, PADEP submitted two revisions to its SIP to address case-by-case NOX and/
or VOC RACT for 93 major facilities.
These SIP revisions are intended to address the NOX and/or VOC RACT
requirements under sections 182 and 184 of the CAA for the 1997 and 2008
8-hour ozone NAAQS. Table 1 of this document lists the SIP submittal date and the facilities included in PADEPs submittal that EPA is proposing to approve in this action. EPA views each facility as a separable SIP revision and may take separate final action on one or more facilities. In this rulemaking SUPPLEMENTARY INFORMATION:

action, EPA is only proposing to approve case-by-case RACT
determinations for nine of the 93
sources submitted to EPA by PADEP on behalf of Philadelphia Air Management Services AMS for facilities located in Philadelphia County.
The SIP revisions in this action only establish 2008 8-hour ozone NAAQS
RACT requirements. Applicable RACT
requirements under the CAA for sources located in Philadelphia for the 1997
8-hr ozone NAAQS were previously satisfied. See 81 FR 69687 October 7, 2016, effective November 7, 2016. For additional background information on Pennsylvanias presumptive RACT II
SIP see 84 FR 20274 May 9, 2019 and on Pennsylvanias source-specific or case-by-case RACT determinations see the appropriate technical support document TSD which is available online at https www.regulations.gov, Docket No. EPAR03OAR20200598.

TABLE 1PADEP SIP SUBMITTALS FOR MAJOR NOX AND/OR VOC SOURCES IN PHILADELPHIA COUNTY SUBJECT TO
SOURCE-SPECIFIC RACT UNDER THE 2008 8-HOUR OZONE STANDARD
SIP submittal date
Major source
5/7/2020

AdvanSix Resins & Chemicals LLCFrankford Plant formerly, Honeywell InternationalFrankford Plant.
Exelon Generation CompanyRichmond Generating Station.
Grays Ferry Cogeneneration PartnershipSchuylkill Station.
Vicinity Energy PhiladelphiaSchuylkill Station formerly Veolia Energy PhiladelphiaSchuylkill Station.
Kinder Morgan Liquids Terminals, LLCPhiladelphia Terminal.
Naval Surface Warfare CenterPhiladelphia Divison 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.

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I. Background A. 1997 and 2008 8-Hour Ozone NAAQS
Ground level ozone is not emitted directly into the air but is created by chemical reactions between NOX and VOC in the presence of sunlight.
Emissions from industrial facilities, electric utilities, motor vehicle exhaust, gasoline vapors, and chemical solvents are some of the major sources of NOX
and VOC. Breathing ozone can trigger a variety of health problems, particularly for children, the elderly, and people of all ages who have lung diseases such as asthma. Ground level ozone can also have harmful effects on sensitive vegetation and ecosystems.
On July 18, 1997, EPA promulgated a standard for ground level ozone based on 8-hour average concentrations. 62 FR
38856. The 8-hour averaging period replaced the previous 1-hour averaging period, and the level of the NAAQS was changed from 0.12 parts per million
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ppm to 0.08 ppm. EPA has designated two moderate nonattainment areas in Pennsylvania under the 1997 8-hour ozone NAAQS, namely PhiladelphiaWilmington-Atlantic City, PA-NJ-MDDE the Philadelphia Area and Pittsburgh-Beaver Valley the Pittsburgh Area. See 40 CFR 81.339.
On March 12, 2008, EPA strengthened the 8-hour ozone standards, by revising its level to 0.075 ppm averaged over an 8-hour period 2008 8-hour ozone NAAQS. On May 21, 2012, EPA
designated five marginal nonattainment areas in Pennsylvania for the 2008
8-hour ozone NAAQS: AllentownBethlehem-Easton, Lancaster, Reading, the Philadelphia Area, and the Pittsburgh Area. 77 FR 30088; see also 40 CFR 81.339.
On March 6, 2015, EPA announced its revocation of the 1997 8-hour ozone NAAQS for all purposes and for all areas in the country, effective on April 6, 2015. 80 FR 12264. EPA has
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determined that certain nonattainment planning requirements continue to be in effect under the revoked standard for nonattainment areas under the 1997
8-hour ozone NAAQS, including RACT.
On November 7, 2016 EPA
determined that the Philadelphia 1997
8-hour ozone NAAQS RACT
demonstration satisfies all applicable RACT requirements under the CAA for Philadelphia for the 1997 8-hour ozone NAAQS. 81 FR 69687 October 7, 2016.
B. RACT Requirements for Ozone The CAA regulates emissions of NOX
and VOC to prevent photochemical reactions that result in ozone formation.
RACT is an important strategy for reducing NOX and VOC emissions from major stationary sources within areas not meeting the ozone NAAQS.
Areas designated nonattainment for the ozone NAAQS are subject to the general nonattainment planning requirements of CAA section 172.
Section 172c1 of the CAA provides
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