Technical Support Document for Best Available Retrofit Technology Under the Regional Haze Rule [final]

The purpose of this document is to describe Illinois approach for meeting the BART requirements for emission sources in Illinois that have been shown to be BART-eligible. Technical analyses conducted by the Illinois EPA have shown that certain BART-eligible sources in Illinois are causing or contributing to visibility impairment in several Class I areas in the eastern United States, including Mammoth Cave National Park in Kentucky, the Mingo Wilderness Area in Missouri, and Isle Royale National Park in Michigan. Illinois is therefore required to submit revisions to its State Implementation Plan (SIP) to require that subject emission sources install cost effective retrofit control technologies, or provide equivalent emission reductions.