Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Tennessee; Redesignation of the Knoxville 2008 8-Hour Ozone Nonattainment Area to Attainment

The Environmental Protection Agency (EPA) is taking four separate final actions related to a state implementation plan (SIP) revision submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), Division of Air Pollution Control, on November 14, 2014, for the Knoxville, Tennessee 8-hour ozone nonattainment area (hereinafter referred to as the "Knoxville Area" or "Area"). The Knoxville Area includes a portion of Anderson County as well as Blount and Knox Counties in their entireties. EPA is approving the base year emissions inventory for the 2008 8-hour ozone national ambient air quality standards (NAAQS) for the Knoxville Area; determining that the Knoxville Area is attaining the 2008 8-hour ozone NAAQS; approving into the SIP the State's plan for maintaining attainment of the 2008 8-hour ozone NAAQS in the Area, including the 2011 and 2026 motor vehicle emission budgets (MVEBs) for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOC); and redesignating the Area to attainment for the 2008 8-hour ozone NAAQS. EPA is also finding the 2011 and 2026 MVEBs for NO<INF>X</INF> and VOC for the Knoxville Area adequate for the purposes of transportation conformity.