Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Allegheny County's Generic VOC and NOX RACT Regulation and Revised Definitions

EPA is taking direct final action to approve revisions to the Pennsylvania State Implementation Plan (SIP) submitted by the Commonwealth of Pennsylvania on behalf of the Allegheny County Health Department, Bureau of Environmental Quality, Division of Air Quality (hereafter the ACHD). These revisions consist of a generic regulation which requires major sources of volatile organic compounds (VOC) and nitrogen oxides (NO<INF>X</INF>) to implement reasonably available control technology (RACT) and related changes to the definitions of the terms "major source" and "potential emissions" and "low NO<INF>X</INF> burner with separate overfire air." This generic RACT regulation applies to major sources not otherwise subject to RACT pursuant to other ACHD regulations. These sources are located in Allegheny County. EPA is approving this revision to the SIP in accordance with the Clean Air Act (CAA).