Approval and Promulgation of Air Quality Implementation Plans; State of Maryland; 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

EPA is approving State Implementation Plan (SIP) submittals from the State of Maryland 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. Maryland has made submittals addressing the infrastructure requirements for the 1997 8-hour ozone and fine particulate matter (PM<INF>2.5</INF>) NAAQS and the 2006 PM<INF>2.5</INF> NAAQS. This action approves portions of those submittals.