Approval and Promulgation of Implementation Plans; Tennessee: Nashville Area Second 10-Year Maintenance Plan for the 1-Hour Ozone National Ambient Air Quality Standard

The EPA is approving a revision to the Tennessee State Implementation Plan (SIP) submitted in final form on August 10, 2005. The SIP revision provides the second 10-year maintenance plan for the Nashville (Middle Tennessee) 1-hour ozone maintenance area (Nashville Area), which is composed of the following five counties: Davidson, Rutherford, Sumner, Williamson, and Wilson. The Nashville Area is still required to fulfill obligations under the 1-hour ozone national ambient air quality standard (NAAQS), because EPA has deferred the effective date of the designation for the Nashville Area under the newer 8-hour ozone NAAQS due to participation in an Early Action Compact. EPA is approving this SIP revision because it satisfies the requirement of the Clean Air Act (CAA) for the second 10-year maintenance plan for the Nashville Area. In addition, in this rulemaking, EPA is providing information on its transportation conformity adequacy determination for new motor vehicle emission budgets (MVEBs) for the year 2016 that are contained in the second 10-year 1-hour ozone maintenance plan for the Nashville Area. EPA determined that the 2016 MVEBs are adequate through a previous action. EPA is also approving the 2016 MVEBs in this action.