Air Plan Approval and Designation of Areas; KY; Redesignation of the Kentucky Portion of the Cincinnati-Hamilton 2008 8-Hour Ozone Nonattainment Area to Attainment

On August 26, 2016, the Commonwealth of Kentucky, through the Kentucky Energy and Environment Cabinet, Division for Air Quality (DAQ), submitted a request for the Environmental Protection Agency (EPA) to redesignate the Kentucky portion of the tri-state Cincinnati- Hamilton, Ohio-Kentucky-Indiana 2008 8-hour ozone nonattainment area (hereinafter referred to as the ``Cincinnati-Hamilton, OH-KY-IN Area'' or ``Area'') to attainment for the 2008 8-hour ozone National Ambient Air Quality Standards (NAAQS) and to approve the portions of the State Implementation Plan (SIP) revision containing a maintenance plan and base year emissions inventory for the Area. EPA is proposing to approve the Commonwealth's base year emissions inventory for the Kentucky portion of the Area; to approve the Commonwealth's plan for maintaining attainment of the 2008 8-hour ozone NAAQS in the Area, including motor vehicle emission budgets (MVEBs) for nitrogen oxides (NOx) and volatile organic compounds (VOC) for the years 2020 and 2030 for the Kentucky portion of the Area; and to redesignate the Kentucky portion of the Area to attainment for the 2008 8-hour ozone NAAQS. Through separate actions, EPA has approved the redesignation request and maintenance plan for the Ohio portion of the Area and has proposed to approve the redesignation request and maintenance plan for the Indiana portion of the Area.