Approval and Promulgation of Implementation Plan; Indiana

On February 25, 1994, the State of Indiana submitted regulations as a revision to the ozone State Implementation Plan (SIP), governing the control of Volatile Organic Compound (VOC) emissions from graphic arts sources in Lake and Porter Counties. EPA approved these regulations on May 4, 1995, subject to the condition that the State adopt appropriate record keeping and reporting requirements. On July 24, 1997, the State of Indiana submitted a SIP revision request to the EPA containing, among other things, record keeping and reporting requirements for all graphic arts sources in Indiana. VOC is one of the air pollutants which combine on hot, sunny summer days with oxides of nitrogen to form ground-level ozone, commonly known as smog, in and downwind of significant source areas, such as large urban areas. Ozone pollution is of particular concern because of its harmful effects on lung tissue and breathing passages. The State's rule revisions are designed to meet the Clean Air Act (Act) requirement for States to adopt Reasonably Available Control Technology (RACT) rules for sources that are covered by Control Techniques Guideline (CTG) documents or that are major sources for VOC. This rulemaking action approves, through direct final action, the Indiana SIP revision request as it pertains to graphic arts sources.