Approval and Promulgation of Implementation Plans; Indiana

The United States Environmental Protection Agency (USEPA) is approving an August 25, 1995, State request for a site-specific revision to the Indiana sulfur dioxide (SO<INF>2) State Implementation Plan (SIP). This revision amends the SO<INF>2 emission limitations applicable to the Joseph E. Seagram and Sons, Inc. (Seagram), facility in Lawrenceburg, Indiana, so that two boilers may not operate simultaneously on coal or fuel oil. The Seagram facility has essentially operated under these restrictions for several years, thereby emitting less SO<INF>2 than the previous rules had allowed. The incorporation of this restriction into the Indiana SO<INF>2 SIP was deemed to be necessary after dispersion modeling in support of an SO<INF>2 SIP revision for Cincinnati, Ohio predicted violations of the National Ambient Air Quality Standards (NAAQS) for SO<INF>2 in Dearborn County, Indiana, if Seagram were to operate at the previously allowed SO<INF>2 emission rates. The restrictions contained in Indiana's August 25, 1995, submittal will eliminate the predicted violations in Dearborn County, and their approval by USEPA will enable final Federal approval of the Cincinnati, Ohio SO<INF>2 SIP revision.