EPA is proposing to conditionally approve the State Implementation Plan (SIP) submission, submitted by the State of Tennessee through the Tennessee Department of Environment and Conservation (TDEC). This proposal pertains to the Clean Air Act (CAA) requirements pertaining to prevention of significant deterioration (PSD) (concerning the PM2.5 increments) for the for the 2008 8-hour ozone national ambient air quality standards (NAAQS) infrastructure SIPs. 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. TDEC certified that the Tennessee SIP contains provisions that ensure the 2008 8-hour ozone NAAQS are implemented, enforced, and maintained in Tennessee (hereafter referred to as ``infrastructure submission''). EPA is proposing to supplement the earlier proposed approval related to sections related to prevention of significant deterioration (PSD) (concerning the PM2.5 increments) by proposing conditional approval of the State's infrastructure submission based upon a October 4, 2012, commitment by the State to submit a SIP revision to address current deficiencies in these sections. EPA is proposing to conditionally approve these sections related to PSD because the current Tennessee SIP does not include provisions to fully comply with the requirements of these sections. All of the other required infrastructure elements for the 2008 8-hour ozone NAAQS are being addressed in a separate rulemaking.
Agency Contact: Nacosta C. Ward, Regulatory Development Section, Air Planning Branch, Air, Pesticides and Toxics Management Division, U.S. Environmental Protection Agency, Region 4, 61 Forsyth Street SW., Atlanta, Georgia 30303-8960. The telephone number is (404) 562-9140. Ms. Ward can be reached via electronic mail at firstname.lastname@example.org.