Approval and Promulgation of Implementation Plans; Kentucky: NOX SIP Call Phase II

EPA is taking final action to approve the State Implementation Plan (SIP) revisions submitted by the Commonwealth of Kentucky on September 12, 2005, and March 24, 2006. The first revision provides Kentucky's response to EPA's regulations entitled, "Finding of Significant Contribution and Rulemaking for Certain States in Ozone Transport Assessment Group Region for Purposes of Reducing Regional Transport of Ozone," otherwise known as the "Nitrogen Oxides (NO<INF>X</INF>) SIP Call Phase I." The second revision responds to EPA's regulations entitled, "Interstate Ozone Transport: Response to Court Decisions on the NO<INF>X</INF> SIP Call, NO<INF>X</INF> SIP Call Technical Amendments, and Section 126 Rules," otherwise known as the "NO<INF>X</INF> SIP Call Phase II." EPA proposed to approve Kentucky's request to revise the SIP on May 29, 2009. This action is being taken pursuant to Section 110 of the Clean Air Act (CAA).