Air Plan Approval; DC; Infrastructure Requirements for the 2012 PM2.5

The Environmental Protection Agency (EPA) is taking direct final action to approve a revision to the District of Columbia (the District) state implementation plan (SIP). Whenever new or revised national ambient air quality standards (NAAQS) are promulgated, the Clean Air Act (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. The District has made a submittal addressing the infrastructure requirements for the 2012 annual fine particulate matter (PM2.5) NAAQS. EPA is approving these revisions addressing the infrastructure requirements for the 2012 PM2.5 NAAQS in accordance with the requirements of the CAA.