Approval and Promulgation of Implementation Plans; Tennessee 110(a)(1) and (2) Infrastructure Requirements for the 1997 and 2006 Fine Particulate Matter National Ambient Air Quality Standards

EPA is taking final action to approve in part, and conditionally approve in part, the State Implementation Plan (SIP) submission, submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), as demonstrating that the State meets the SIP requirements of sections 110(a)(1) and (2) of the Clean Air Act (CAA or the Act) for the 1997 annual and 2006 24- hour fine particulate matter (PM<INF>2.5</INF>) national ambient air quality standards (NAAQS). Section 110(a) of 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. Tennessee certified that the Tennessee SIP contains provisions that ensure the 1997 annual and 2006 24-hour PM<INF>2</INF> NAAQS are implemented, enforced, and maintained in Tennessee (hereafter referred to as "infrastructure submission"). With the exception of element 110(a)(2)(E)(ii), which pertains to the requirements of section 128(a)(1) of the CAA, Tennessee's infrastructure submissions, provided to EPA on December 14, 2007, and October 19, 2009, addresses all the required infrastructure elements for the 1997 annual and 2006 24-hour PM<INF>2</INF> NAAQS.