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

EPA is approving the attainment demonstration for the one-hour ozone national ambient air quality standard (NAAQS) for the Philadelphia-Wilmington-Trenton severe nonattainment area (the Philadelphia area) as a revision to the Delaware State Implementation Plan (SIP). EPA is also approving the Post-1996 rate-of-progress (ROP) plans for the Delaware portion of the Philadelphia area, namely Kent and New Castle Counties. These control strategy plans were submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC). The measures that have been adopted by the State which comprise the control strategies 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. Two counties in Delaware, one county in Maryland, seven counties in New Jersey, and five counties in Pennsylvania comprise the Philadelphia area. The intended effect of this action is to approve this SIP revision as meeting the requirements of the Clean Air Act (CAA or the Act).