Designation of Areas for Air Quality Planning Purposes; Wisconsin

In this action USEPA is removing all total suspended particulate (TSP) area designations in the State of Wisconsin. This direct final action was prompted by the Wisconsin Department of Natural Resources' (WDNR) April 20, 1994 request to redesignate portions of the cities of Brokaw, Green Bay, Kenosha, Madison, Manitowac, Marshfield, Milwaukee, Oshkosh, Racine, Superior and Waukesha from secondary TSP nonattainment to attainment or unclassifiable for PM. On June 3, 1993 (58 FR 31622), USEPA published a final rule revising the prevention of significant deterioration (PSD) particulate matter increments, which became effective on June 4, 1994, so that the increments are measured in terms of particulate matter with an aerodynamic diameter less than 10 microns (PM). Section 107(d)(4)(B) of the Clean Air Act (Act) authorizes USEPA to eliminate all area TSP designations once the increments for PM are promulgated. The June 3, 1993 action also established the method by which USEPA deletes such TSP designations.