Approval and Promulgation of Air Quality Implementation Plans; Wisconsin; Redesignation of the Milwaukee-Racine 2006 24-Hour Fine Particle Nonattainment Area to Attainment

The Environmental Protection Agency (EPA) is approving Wisconsin's request to redesignate the Milwaukee-Racine, Wisconsin nonattainment area (Milwaukee, Racine and Waukesha Counties) to attainment for the 2006 24-hour National Ambient Air Quality Standard (NAAQS or standard) for fine particulate matter (PM<INF>2.5</INF>) because the request meets the statutory requirements for redesignation under the Clean Air Act (CAA). The Wisconsin Department of Natural Resources (WDNR) submitted this request to EPA on June 8, 2012, and supplemented it on May 30, 2013. EPA's approval involves several related actions. EPA is making a determination that the Milwaukee- Racine area has attained the 2006 24-hour PM<INF>2.5</INF> standard. EPA is approving, as a revision to the Wisconsin state implementation plan (SIP), the state's plan for maintaining the 2006 24-hour PM<INF>2.5</INF> NAAQS through 2025 in the area. EPA is also approving the comprehensive emissions inventories submitted by WDNR for Nitrogen Oxides (NO<INF>X</INF>), Sulfur Dioxide (SO<INF>2</INF>), primary PM<INF>2.5</INF>, Volatile Organic Compounds (VOC), and ammonia as meeting the requirements of the CAA. Finally, EPA finds adequate and is approving Wisconsin's direct PM<INF>2.5</INF>, SO<INF>2</INF>, NO<INF>X</INF> and VOC Motor Vehicle Emission Budgets (MVEBs) for 2020 and 2025 for the Milwaukee-Racine area.