Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; State of Indiana

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On July 8, 1994, the United States Environmental Protection Agency (USEPA) published direct final rulemaking approving the redesignation of St. Joseph, Elkhart, Marion, and Vanderburgh Counties, Indiana to attainment of the ozone National Ambient Air Quality Standards (NAAQS) and their accompanying maintenance plans as State Implementation Plan (SIP) revisions. On the same day (July 8, 1994), a proposed rule was also published which established a 30-day public comment period noting that, if adverse comments were received regarding the direct final rule, the USEPA would withdraw the direct final rule and publish an additional final rule to address the public comments. Adverse comments were received during the public comment period and the USEPA published a withdrawal of the direct final rule on August 26, 1994. This final rule summarizes these comments and USEPA's responses and finalizes the approval of the redesignation of St. Joseph, Elkhart and Marion Counties. However, due to preliminary, non-quality industrial assured ozone data recently received from the State of Indiana for Warrick County, (which is adjacent to Vanderburgh County) indicating that a violation of the ozone stan