The Environmental Protection Agency (EPA) is approving State Implementation Plan (SIP) revisions submitted by the State of Georgia, through the Georgia Environmental Protection Division (GA EPD) of the Department of Natural Resources, in letters dated September 19, 2006, with a clarification submitted on November 6, 2006, and July 31, 2018. EPA is approving miscellaneous changes to several Georgia rules. This action is being finalized pursuant to the Clean Air Act (CAA or Act) and its implementing regulations.