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 Standard
The Environmental Protection Agency (EPA) is conditionally approving two State Implementation Plan (SIP) revisions for the Commonwealth of Pennsylvania. The SIP revisions consist of a demonstration that Philadelphia County is meeting the requirements of reasonably available control technology (RACT) of the Clean Air Act (CAA) for nitrogen oxides (NOX) and volatile organic compounds (VOC) under the 1997 8-hour ozone national ambient air quality standard (NAAQS). EPA's conditional approval of Philadelphia County's 1997 8-hour ozone RACT demonstration is based on Philadelphia County's commitment to submit additional SIP revisions addressing source-specific RACT controls for major sources of VOC and NOX in the County. This action is being taken under the CAA.