Approval and Promulgation of Implementation Plans; Alaska: Infrastructure Requirements for the 1997 and 2006 Fine Particulate Matter and 2008 Ozone National Ambient Air Quality Standards

The EPA is approving the Alaska State Implementation Plan (SIP) as meeting specific infrastructure requirements of the Clean Air Act (CAA) for the National Ambient Air Quality Standards (NAAQS) promulgated for fine particulate matter (PM<INF>2.5</INF>) on July 18, 1997 and October 17, 2006, and for ozone on March 12, 2008. Whenever a new or revised NAAQS is 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 implement, maintain, and enforce the standards. These elements are referred to as infrastructure requirements.