Approval and Promulgation of Implementation Plans; Indiana

On August 8, 1995, the State of Indiana submitted a State Implementation Plan (SIP) revision request to the United States Environmental Protection Agency (USEPA) for rule changes specific to Richmond Power and Light's (RPL's) Whitewater Generating Station located in Wayne County in Richmond, Indiana. The submittal provides for less stringent limits on particulate matter (PM) emissions than those currently in the SIP from both of the generating station's two primary boilers. The submittal also adds a combined PM limit for those times when both boilers are operating, establishes a site-specific opacity limit for the facility, and specifies a site-specific method for evaluating PM stack test results. The submittal includes air quality modeling which shows that the National Ambient Air Quality Standards (NAAQS) will still be protected under the new regulations.