Approval of Implementation Plans and Designation of Areas; Georgia; Redesignation of the Georgia Portion of the Chattanooga, 1997 PM2.5 Nonattainment Area to Attainment

On September 14, 2012, the Georgia Department of Natural Resources, through the Georgia Environmental Protection Division (GA EPD), submitted a request to redesignate the Georgia portion of Chattanooga, TN-GA-AL fine particulate matter (PM<INF>2.5</INF>) nonattainment area (hereafter referred to as the "Chattanooga TN-GA-AL Area" or "Area") to attainment for the 1997 annual PM<INF>2.5</INF> national ambient air quality standards (NAAQS) and to approve a state implementation plan (SIP) revision containing a maintenance plan for the Chattanooga TN-GA-AL Area. The Georgia portion of Chattanooga TN- GA-AL Area is comprised of two Counties: Catoosa and Walker Counties in Georgia. EPA is approving the redesignation request and the related SIP revision for the Georgia portion of Chattanooga TN-GA-AL Area, including GA EPD's plan for maintaining attainment of the 1997 Annual PM<INF>2.5</INF> standard in the Chattanooga TN-GA-AL Area. EPA is also approving, into the Georgia SIP, the motor vehicle emission budgets (MVEBs) for nitrogen oxides (NO<INF>x</INF>) and PM<INF>2.5</INF> for the year 2025 for the Georgia portion of Chattanooga TN-GA-AL Area. On April 23, 2013, and November 13, 2014, Alabama and Tennessee (respectively) submitted requests to redesignate the Alabama and Tennessee portions of the Chattanooga TN-GA-AL Area. EPA will be taking separate action on the requests from Alabama and Tennessee.