Approval and Promulgation of Implementation Plans; Indiana

On November 21, 1995, and February 14, 1996, the State of Indiana submitted rules for the control of volatile organic liquid (VOL) storage operations in Clark, Floyd, Lake, and Porter Counties as a requested State Implementation Plan (SIP) revision. This rule is part of the State's 15 percent (%) Rate of Progress (ROP) plan to control Volatile Organic Compounds (VOC) emissions in Clark and Floyd Counties, and is included in the VOC contingency plan for Lake and Porter Counties. In addition, this rule is intended to satisfy Clean Air Act (Act) requirements to adopt VOC Reasonably Available Control Technology (RACT) rules for non-Control Techniques Guidelines (CTG) sources in Clark, Floyd, Lake, and Porter Counties. Emissions of VOC react with nitrogen oxides in sunlight to form ground-level ozone, commonly known as smog. Exposure to high ozone concentrations causes respiratory irritation, especially to children, seniors, and people with asthma and other respiratory problems. Indiana expects that the control measures specified in this VOL storage SIP will reduce VOC emissions by 2,620 pounds per day (lbs/day) in Lake and Porter Counties and 142 lbs/day in Clark and Floyd Counties. In this action, EPA is approving Indiana's rule as a direct final action; the rationale for this approval is set forth below. 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. Unless this direct final is withdrawn, no further rulemaking will occur on this requested SIP revision.