Approval and Promulgation of Implementation Plans; Kentucky; 110(a)(1) and (2) Infrastructure Requirements for the 2008 8-Hour Ozone National Ambient Air Quality Standards
EPA is proposing to approve in part, conditionally approve in part, and disapprove in part, the July 17, 2012, State Implementation Plan (SIP) submission provided by the Commonwealth of Kentucky, through the Division of Air Quality (DAQ) of the Kentucky Energy and Environment Cabinet. Kentucky DAQ submitted the July 17, 2012, SIP submission as a replacement to its original September 8, 2009, SIP submission. Specifically, this proposal pertains to the Clean Air Act (CAA or Act) requirements for the 2008 8-hour ozone national ambient air quality standards (NAAQS) infrastructure SIP. The CAA requires that each state adopt and submit a SIP for the implementation, maintenance, and enforcement of each NAAQS promulgated by EPA, which is commonly referred to as an ``infrastructure'' SIP. Kentucky DAQ made a SIP submission demonstrating that the Kentucky SIP contains provisions that ensure the 2008 8-hour ozone NAAQS are implemented, enforced, and maintained in the Commonwealth (hereafter referred to as ``infrastructure submission''). EPA is now proposing three related actions on Kentucky DAQ's infrastructure SIP submission. First, EPA is proposing to determine that Kentucky DAQ's infrastructure submission, provided to EPA on July 17, 2012, satisfies certain required infrastructure elements for the 2008 8-hour ozone NAAQS. Second, with respect to the infrastructure requirements related to specific prevention of significant deterioration (PSD) requirements, EPA is proposing to approve, in part and conditionally approve in part, the infrastructure SIP submission based on a December 19, 2012, Kentucky DAQ commitment to submit specific enforceable measures for approval into the SIP to address specific PSD program deficiencies. Third, EPA is proposing to disapprove Kentucky DAQ's infrastructure SIP submission with respect to certain interstate transport requirements for the 2008 8-hour ozone NAAQS because the submission does not address the statutory provisions with respect to the relevant NAAQS and thus does not satisfy the criteria for approval. The CAA requires EPA to act on this portion of the SIP submission even though under a recent court decision (which is not yet final as EPA has requested rehearing), Kentucky DAQ was not yet required to submit a SIP submission to address these interstate transport requirements. Moreover, under that same court decision, this disapproval does not trigger an obligation for EPA to promulgate a Federal Implementation plan (FIP) to address these interstate transport requirements.
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