Air Plan Approval; GA and SC: Changes to Ambient Air Standards and Definitions

The Environmental Protection Agency (EPA) is proposing to approve portions of revisions to the Georgia State Implementation Plan (SIP) submitted by the Georgia Department of Natural Resources, Environmental Protection Division, on August 30, 2010, and on July 25, 2014; and portions of revisions to the South Carolina SIP, submitted by the Department of Health and Environmental Control on December 15, 2014, August 12, 2015, and November 4, 2016. The Georgia SIP revisions incorporate definitions relating to fine particulate matter (PM 2.5 ), and amend state rules to reflect the 2008 national ambient air quality standard (NAAQS) for lead. The South Carolina SIP revisions incorporates the 2010 sulfur dioxide NAAQS, 2010 nitrogen dioxide NAAQS, 2012 PM 2.5  NAAQS, 2015 8-hour ozone NAAQS, removes the 1997 8-hour ozone NAAQS, and removes the standard for gaseous fluorides from the SIP. This action is being proposed because Georgia and South Carolina have demonstrated that these changes are consistent with the Clean Air Act.