Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Wisconsin; Redesignation of the Manitowoc County and Door County Areas to Attainment for Ozone

EPA is approving Wisconsin's requests to redesignate the Manitowoc County and Door County, Wisconsin nonattainment areas to attainment for the 1997 8-hour ozone standard because the requests meet the statutory requirements for redesignation under the Clean Air Act (CAA). The Wisconsin Department of Natural Resources (WDNR) submitted these requests on September 11, 2009. These approvals involve several related actions. EPA is making determinations under the CAA that the Manitowoc County and Door County areas have attained the 1997 8-hour ozone National Ambient Air Quality Standard (NAAQS). These determinations are based on three years of complete, quality-assured and certified ambient air quality monitoring data for the 2006-2008 ozone seasons that demonstrate that the 8-hour ozone NAAQS has been attained in the areas. Complete, quality-assured air quality data for the 2009 ozone season have been recorded in the EPA's Air Quality System (AQS) and show that the areas continue to attain the 8-hour ozone standard. EPA is also approving, as revisions to the Wisconsin State Implementation Plan (SIP), the State's plans for maintaining the 8-hour ozone NAAQS through 2020 in the areas. EPA is approving the 2005 base year emissions inventories for the Manitowoc County and Door County areas as meeting the base year emissions inventory requirement of the CAA. WDNR submitted these base year emissions inventories on June 12, 2007. Finally, EPA finds adequate and is proposing to approve the State's 2012 and 2020 Motor Vehicle Emission Budgets (MVEBs) for the Manitowoc County and Door County areas.