Promulgation of State Implementation Plan Revisions; Infrastructure Requirements for the 2010 SO2

The Environmental Protection Agency (EPA) is proposing to approve elements of State Implementation Plan (SIP) revisions from the State of South Dakota to demonstrate the State meets infrastructure requirements of the Clean Air Act (Act, CAA) for the National Ambient Air Quality Standards (NAAQS) promulgated for sulfur dioxide (SO2) on June 2, 2010, and fine particulate matter (PM2.5) on December 14, 2012. Section 110(a) of the CAA requires that each state submit a SIP for the implementation, maintenance, and enforcement of each NAAQS promulgated by the EPA.