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

摘要

EPA is proposing to approve 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 proposed approvals involve several related actions. EPA is proposing to determine that the Manitowoc County and Door County areas have attained the 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 proposing to approve, as revisions to the Wisconsin State Implementation Plan (SIP), the State's plans for maintaining the 8-hour ozone NAAQS through 2020 in