Approval of Air Quality Implementation Plans; Minnesota; Infrastructure SIP Requirements for the 2008 Ozone, 2010 NO2, 2010 SO2, and 2012 PM2.

The Environmental Protection Agency (EPA) is proposing to approve some elements and disapprove other elements of state implementation plan (SIP) submissions from Minnesota regarding the infrastructure requirements of section 110 of the Clean Air Act (CAA) for the 2008 ozone, 2010 nitrogen dioxide (NO2), 2010 sulfur dioxide (SO2), and 2012 fine particulate matter (PM2.5) 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. EPA proposes to disapprove certain elements of Minnesota's submissions relating to Prevention of Significant Deterioration (PSD) requirements. Minnesota already administers Federally promulgated regulations that address the proposed disapprovals described in today's rulemaking. Therefore, the state will not be obligated to submit any new or additional regulations as a result of a future final disapproval.