Approval and Promulgation of Air Quality Implementation Plans; Delaware; Conversion of the Conditional Approval of the NOX RACT Regulation to a Full Approval and Approval of NOX RACT Determinations for Three Sources

EPA is taking direct final action to approve revisions to the Delaware State Implementation Plan (SIP) submitted by the Delaware Department of Natural Resources and Environmental Control (DNREC). These revisions were submitted to satisfy the condition imposed by EPA in its conditional limited approval of Delaware's regulation requiring reasonably available control technology (RACT) for major sources of nitrogen oxides ( NO<INF>X</INF>). This action converts EPA's conditional limited approval of Delaware Regulation 12, Control of NO<INF>X</INF> Emissions, to a full approval. EPA is also taking direct final action to approve three source-specific NO<INF>X</INF> RACT determinations. These actions are being taken under the Clean Air Act (CAA).