Air Plan Approval; Alabama; Regional Haze Plan and Prong 4 (Visibility) for the 2012 PM2.5

The Environmental Protection Agency (EPA) is proposing to take the following four actions regarding the Alabama State Implementation Plan (SIP), contingent upon a final determination from the Agency that a state's participation in the Cross-State Air Pollution Rule (CSAPR) continues to meet the Regional Haze Rule (RHR)'s criteria to qualify as an alternative to the application of Best Available Retrofit Technology (BART): Approve the portion of Alabama's October 26, 2015, SIP submittal seeking to change reliance from the Clean Air Interstate Rule (CAIR) to CSAPR for certain regional haze requirements; convert EPA's limited approval/limited disapproval of Alabama's July 15, 2008, regional haze SIP to a full approval; approve the visibility prong of Alabama's infrastructure SIP submittals for the 2012 Fine Particulate Matter (PM2.5), 2010 Nitrogen Dioxide (NO2), and 2010 Sulfur Dioxide (SO2) National Ambient Air Quality Standards (NAAQS); and convert EPA's disapproval of the visibility portion of Alabama's infrastructure SIP submittal for the 2008 Ozone NAAQS to an approval.