Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Philadelphia County Reasonably Available Control Technology Under the 1997 8-Hour Ozone National Ambient Air Quality Standards

Résumé

The Environmental Protection Agency (EPA) is approving state implementation plan (SIP) revisions submitted by the Commonwealth of Pennsylvania (Pennsylvania). The revisions pertain to a demonstration that Philadelphia County (Philadelphia) meets the requirements for reasonably available control technology (RACT) of the Clean Air Act (CAA) for nitrogen oxides (NO X ) and volatile organic compounds (VOC) as ozone precursors for the 1997 8-hour ozone national ambient air quality standards (NAAQS). In this rulemaking action, EPA is approving three separate SIP revisions addressing RACT under the 1997 8-hour ozone NAAQS for Philadelphia; approving portions of two previously submitted RACT SIP revisions, which EPA had found deficient and conditionally approved; and converting the prior conditional approval of the Philadelphia RACT demonstration for the 1997 8-hour ozone NAAQS to full approval. EPA is approving these revisions to the Pennsylvania SIP addressing 1997 8-hour ozone RACT for Philadelphia in accordance with the requirements of the CAA.