Approval and Promulgation of Air Quality Implementation Plans; Michigan; PSD Regulations

EPA is taking direct final action to convert a conditional approval of specified provisions of the Michigan State Implementation plan (SIP) to a full approval. The revisions consist of requirements of the prevention of significant deterioration (PSD) construction permit program under the Federal Clean Air Act (CAA). This program affects major stationary sources in Michigan that are subject to or potentially subject to the PSD construction permit program. EPA is converting its prior conditional approval to full approval because the Michigan Department of Environmental Quality (MDEQ) submitted corrections to the rules that satisfy the conditions listed in EPA's conditional approval. As part of this direct final rule, EPA is rescinding Michigan's delegation of authority for implementing the Federal PSD regulations. This action is being taken under section 110 of the CAA.