Approval and Promulgation of Implementation Plans; Indiana

On February 13, 1996, and June 27, 1996, the State of Indiana submitted, as a requested revision to the State Implementation Plan (SIP) for ozone, 326 IAC 8-12, a rule controlling volatile organic compound (VOC) emissions from shipbuilding and ship repair coating operations in Clark, Floyd, Lake, and Porter Counties. This rule is part of the State's 15% Rate-of-Progress (ROP) plan for reducing VOC emissions in Clark and Floyd Counties. VOCs are air pollutants which combine with oxides of nitrogen to form ground-level ozone, a pollutant which can damage lung tissue and cause serious respiratory illness. ROP plans are intended to help areas with ozone problems attain the public health based Federal ozone air quality standard. Indiana expects that the control measures required by this requested SIP revision will reduce VOC emissions by 1,164 pounds per day in Clark and Floyd Counties. In this action, EPA is approving the requested SIP revision through a ``direct final'' rulemaking; the rationale for this approval is set forth in the supplementary information section of this rulemaking. Elsewhere in this Federal Register, EPA is proposing approval and soliciting comment on this direct final action; if adverse comments are received, EPA will withdraw the direct final and address the comments received in a new final rule; otherwise, no further rulemaking will occur on this requested SIP revision.