Air Plan Approval/Disapproval; Alabama; Infrastructure Requirements for the 2010 Sulfur Dioxide National Ambient Air Quality Standard

The Environmental Protection Agency (EPA) is proposing to approve in part and disapprove in part portions of the April 23, 2013, State Implementation Plan (SIP) submission, submitted by the State of Alabama, through the Alabama Department of Environmental Management (ADEM), for inclusion into the Alabama SIP. This proposal 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. ADEM certified that the Alabama SIP contains provisions that ensure the 2010 1-hour SO2 NAAQS is implemented, enforced, and maintained in Alabama. With the exception of provisions respecting state boards, which EPA is proposing to disapprove, and interstate transport, which EPA is not proposing any action at this time, EPA is proposing to determine that portions of Alabama's infrastructure SIP submission provided to EPA on April 23, 2013, satisfy the required infrastructure elements for the 2010 1-hour SO2 NAAQS.