Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Infrastructure Requirements for the 2010 Nitrogen Dioxide and 2012 Fine Particulate Matter National Ambient Air Quality Standards

The Environmental Protection Agency (EPA) is approving portions of two State Implementation Plan (SIP) revisions submitted by the Commonwealth of Pennsylvania through the Pennsylvania Department of Environmental Protection (PADEP) pursuant to the Clean Air Act (CAA). Whenever new or revised national ambient air quality standards (NAAQS) are promulgated, the CAA requires states to submit a plan for the implementation, maintenance, and enforcement of such NAAQS. The plan is required to address basic program elements, including, but not limited to regulatory structure, monitoring, modeling, legal authority, and adequate resources necessary to assure attainment and maintenance of the standards. These elements are referred to as infrastructure requirements. PADEP made two separate SIP submittals addressing the infrastructure requirements for the 2010 nitrogen dioxide (NO<INF>2</INF>) NAAQS and the 2012 fine particular matter (PM<INF>2.5</INF>) NAAQS. In this rulemaking action, EPA is approving, in accordance with the requirements of the CAA, the two infrastructure SIP submissions with the exception of some portions of the submittals addressing visibility protection.