Air Plan Approval; Mississippi; Infrastructure Requirements for the 2010 Sulfur Dioxide National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is taking final action to approve, in part, and disapprove in part, the State Implementation Plan (SIP) submission, submitted by the State of Mississippi, through the Mississippi Department of Environmental Quality (MDEQ), on June 20, 2013, for inclusion into the Mississippi SIP. This final action pertains to the infrastructure requirements of the Clean Air Act (CAA or Act) for the 2010 1-hour sulfur dioxide (SO2) national ambient air quality standard (NAAQS). The CAA requires that each state adopt and submit a SIP for the implementation, maintenance and enforcement of each NAAQS promulgated by EPA, which is commonly referred to as an ``infrastructure SIP submission.'' MDEQ certified that the Mississippi SIP contains provisions that ensure the 2010 1-hour SO2 NAAQS is implemented, enforced, and maintained in Mississippi. EPA has determined that Mississippi's infrastructure SIP submission, provided to EPA on June 20, 2013, satisfies certain required infrastructure elements for the 2010 1-hour SO2 NAAQS.