Air Plan Approval; Michigan; 2006 PM2.

The Environmental Protection Agency (EPA) is approving elements of state implementation plan (SIP) submissions from Michigan regarding state board requirements of section 110 of the Clean Air Act (CAA) for the 2006 fine particulate matter (PM2.5) and 2008 lead National Ambient Air Quality Standards (NAAQS). The infrastructure requirements are designed to ensure that the structural components of each state's air quality management program are adequate to meet the state's responsibilities under the CAA.