Air Plan Approval; SC Infrastructure Requirements for the 2010 1-Hour NO2

The Environmental Protection Agency (EPA) is taking final action to approve portions of the State Implementation Plan (SIP) submission, submitted by the State of South Carolina, through the South Carolina Department of Health and Environmental Control (SC DHEC) on April 30, 2014, to demonstrate that the State meets certain infrastructure requirements of the Clean Air Act (CAA or Act) for the 2010 1-hour nitrogen dioxide (NO2) national ambient air quality standards (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. SC DHEC certified that the South Carolina SIP contains provisions that ensure the 2010 NO2 NAAQS are implemented, enforced, and maintained in South Carolina. EPA has determined that South Carolina's SIP satisfies certain required infrastructure elements for the 2010 NO2 NAAQS.