Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Attainment Plan for the Lower Beaver Valley Nonattainment Area for the 2008 Lead National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is proposing to approve a state implementation plan (SIP) revision submitted by the Commonwealth of Pennsylvania (Pennsylvania) for the purpose of demonstrating attainment of the 2008 lead national ambient air quality standard (NAAQS) in the Lower Beaver Valley 2008 lead nonattainment area (Lower Beaver Valley Area or Area). The attainment plan includes the base year emissions inventory, modeling demonstration of attainment with the lead NAAQS, and an analysis of reasonably available control measures (RACM), reasonably available control technology (RACT), and reasonable further progress (RFP). The attainment plan also includes contingency measures for the Lower Beaver Valley Area which include parts of a Consent Order and Agreement (COA) between Horsehead Corporation (Horsehead) and the Pennsylvania Department of Environmental Protection (PADEP). This action is being taken under the Clean Air Act (CAA).