Approval and Promulgation of Air Quality Implementation Plans; Commonwealth of Pennsylvania; Section 110(a)(2) Infrastructure Requirements for the 1997 8-Hour Ozone and the 1997 and 2006 Fine Particulate Matter National Ambient Air Quality Standards

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EPA is approving submittals from the Commonwealth of Pennsylvania 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. Pennsylvania has made submittals addressing the infrastructure requirements for the 1997 8-hour ozone and fine particulate matter (PM 2.5 ) NAAQS and the 2006 PM 2.5 NAAQS. This action approves those submittals, or portions thereof.