Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Post 1996 Rate-of-Progress Plan and One-Hour Ozone Attainment Demonstration for the Philadelphia-Wilmington-Trenton Ozone Nonattainment Area

The EPA is approving the State Implementation Plans (SIPs) consisting of the Post 1996 rate-of-progress (ROP) plans and the one- hour ozone attainment demonstration for the Philadelphia-Wilmington- Trenton severe nonattainment area (the Philadelphia area). These control strategy plans were submitted by the Pennsylvania Department of Environmental Protection (PADEP). The measures that have been adopted by the Commonwealth which comprise the control strategies of the Post- 1996 ROP plans and the one-hour ozone attainment demonstration have and will result in significant emission reductions of volatile organic compounds (VOCs) and oxides of nitrogen ( NO<INF>X</INF>) in the Philadelphia area. The intended effect of this action is to approve these SIP revisions as meeting the requirements of the Clean Air Act (CAA or the Act). The Philadelphia area is comprised of two counties in Delaware, one county in Maryland, seven counties in New Jersey, and five counties in Pennsylvania, namely Bucks, Chester, Delaware, Montgomery, and Philadelphia counties.