Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Base Year Emissions Inventories for the Lebanon and Delaware County Nonattainment Areas for the 2012 Annual Fine Particulate Matter National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is approving two state implementation plan (SIP) revisions submitted by the Commonwealth of Pennsylvania. These revisions pertain to base year emission inventories for the Lebanon County and Delaware County nonattainment areas for the 2012 annual fine particulate national ambient air quality standard (NAAQS). The Clean Air Act (CAA) requires states to submit a comprehensive, accurate and current inventory of actual emissions from all sources of direct and secondary ambient fine particulate matter less than 2.5 microns in diameter (PM2.5) for all PM2.5 nonattainment areas. EPA is approving these revisions in accordance with the requirements under Title I of the CAA.