Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; NOX RACT Determination for the Naval Surface Warfare Center, Caderock Division Ship Systems Engineering Station

EPA is taking direct final action to approve revisions to the Commonwealth of Pennsylvania's State Implementation Plan (SIP). The revisions were submitted by the Pennsylvania Department of Environmental Protection (PADEP) to establish and require reasonably available control technology (RACT) for the Naval Surface Warfare Center, Caderock Division Ship Systems Engineering Station (NSWCCD- SSES), a major source of nitrogen oxides (NO<INF>X</INF>). This source is located in Pennsylvania. The EPA is approving this revision to establish RACT requirements in the SIP in accordance with the Clean Air Act (CAA).