How Did IDEM Change Its Rule?
The major change deals with the applicability of the rule. In ozone nonattainment areas, facilities which emit VOC or NOX in amounts of 25 tons per year or more into the ambient air must submit an emission statement to IDEM. Once an area meets the national ambient air quality standard and is redesignated to attainment, sources in the area are no longer subject to the emission statement requirements of the CAA. In the State of Indiana, a number of counties subject to the emission statement program have been redesignated as attainment with the onehour ozone standards, and the State has revised regulation 326 IAC 26 to discontinue the requirement in these redesignated areas. Emission statements requirements originally applied to sources in Clark, Elkhart, Floyd, Lake, [[Page 63071]] Marion, Porter, St. Joseph, and Vanderburgh counties. Due to redesignations, however, they now only need apply to sources in Lake and Porter counties. In addition, the State has required reporting of emissions
