EPA is finalizing a limited approval and a limited disapproval of a revision to the Tennessee State Implementation Plan (SIP) submitted by the State of Tennessee, through the Tennessee Department Environment and Conservation (TDEC), on April 4, 2008. EPA is taking final action on the entire SIP revision except for the Best Available Retrofit Technology (BART) determination for Eastman Chemical Company (Eastman). EPA is not taking any action on the Eastman BART determination at this time. Tennessee's April 4, 2008, SIP revision addresses regional haze for the first implementation period. Specifically, this SIP revision addresses the requirements of the Clean Air Act (CAA or Act) and EPA's rules that require states to prevent any future and remedy any existing anthropogenic impairment of visibility in mandatory Class I areas (national parks and wilderness areas) caused by emissions of air pollutants from numerous sources located over a wide geographic area (also referred to as the "regional haze program"). States are required to assure reasonable progress toward the national goal of achieving natural visibility conditions in Class I areas. EPA is finalizing a limited approval of Tennessee's April 4, 2008, SIP revision, except for the Eastman BART determination, to implement the regional haze requirements for Tennessee on the basis that this SIP revision, as a whole, strengthens the Tennessee SIP. Also in this action, EPA is finalizing a limited disapproval of this same SIP revision because of the deficiencies in the State's regional haze SIP revision arising from the remand by the U.S. Court of Appeals for the District of Columbia Circuit (D.C. Circuit) to EPA of the Clean Air Interstate Rule (CAIR).