Approval and Promulgation of Air Quality Implementation Plans; Indiana; Oxides of Nitrogen Regulations

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On March 30, 2001, Indiana submitted and requested parallel processing of its proposed plan to control emissions of oxides of nitrogen ( NO X ) throughout the State. On July 2, 2001, through parallel processing, EPA proposed approval of the plan provided Indiana revise its proposed rule consistent with the discussion in EPA's proposal. Indiana did so and submitted its final plan to EPA on August 20, 2001 with a supplement on September 19, 2001. The plan consists of two rules, a budget demonstration, and supporting documentation. The plan will contribute to attainment and/or maintenance of the 1-hour ozone standard in several 1-hour ozone nonattainment areas including the Chicago-Gary-Lake County and Louisville areas. Indiana developed its plan, which focuses on electric generating units, large industrial boilers, turbines and cement kilns, to achieve the majority of reductions required by EPA's October 27, 1998, NO X State Implementation Plan (SIP) Call. As of May 1, 2004, Indiana's plan will also provide reductions at units currently required to make reductions under the EPA's Clean Air Act (CAA) Section 126 rulemaking. EPA is approving this plan as a SIP revision fulfilling the N