Approval and Promulgation of State Implementation Plans: Michigan: Oxides of Nitrogen

The EPA is approving as a revision to Michigan's Clean Air Act State Implementation Plan (SIP) prepared by Michigan that will limit the emissions of oxides of nitrogen (NO<INF>X</INF>) from large stationary sources (i.e., electric generating units, industrial boilers and cement kilns). This SIP, which the Michigan Department of Environmental Quality (MDEQ) submitted for EPA approval on August 5, 2004, meets all of the requirements contained in an EPA rule that was published in the Federal Register on October 27, 1998. The federal rule, otherwise known as the Phase I NO<INF>X</INF> SIP Call, requires NO<INF>X</INF> reductions from sources in 19 States in the eastern half of the country and the District of Columbia. MDEQ's August 5, 2004, submittal also satisfies the conditions described in EPA's conditional approval notice published in the Federal Register on April 16, 2004. The effect of this approval is to ensure federal enforceability of the state NO<INF>X</INF> plan and to maintain consistency between the state-adopted plan and the approved Michigan SIP. EPA proposed approval of this SIP revision and published a direct final approval on December 23, 2004. EPA received adverse comments on the proposed rulemaking and, therefore, withdrew the direct final rulemaking on February 15, 2005.