Air Plan Approval and Designation of Areas; KY; Redesignation of the Campbell County, 2010 1-Hour Sulfur Dioxide Nonattainment Area to Attainment

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The Environmental Protection Agency (EPA) is proposing to approve two separate but related submissions (one of which includes multiple components) provided by the Commonwealth of Kentucky, through the Kentucky Division of Air Quality (KDAQ), in relation to attainment of the 2010 Sulfur Dioxide (SO 2 ) national ambient air quality standards (NAAQS) for the Kentucky portion of the Campbell- Clermont, Kentucky-Ohio 2010 1-hour SO 2 nonattainment area (hereafter referred to as the "Campbell-Clermont, KY-OH Area" or "Area"). On March 31, 2015, KDAQ submitted a request for EPA to determine that the Campbell-Clermont, KY-OH Area attained the 2010 1- hour SO 2 NAAQS per EPA's "Clean Data Policy." Subsequently, on February 22, 2016, KDAQ submitted a request for EPA to redesignate the Campbell County portion of Kentucky that is within the Campbell-Clermont, KY-OH Area to attainment for the 2010 1-hour SO 2 NAAQS, and to approve a State Implementation Plan (SIP) revision containing a maintenance plan, base year inventory, and reasonably available control measures (RACM) determination for the Kentucky portion of the Area. EPA is proposing to approve the Commonwealth's RACM determination and in