In this action, EPA is approving the following as revisions to the Indiana State Implementation (SIP) plan: A Rate-Of-Progress (ROP) plan to reduce volatile organic compound (VOC) emissions in Clark and Floyd Counties by 15 percent (%) by November 15, 1996; 1996 corrections to Clark and Floyd Counties' 1990 base year emission inventory (to establish an accurate base line for the 15% ROP plan); construction permits requiring VOC emission control at Rhodes, Incorporated (Rhodes) in Charlestown, Clark County; and a ridesharing program affecting commuters in Clark and Floyd Counties. The plan and control measures help protect the public's health and welfare by reducing the emissions of VOC that contribute to the formation of ground-level ozone, commonly known as urban smog. High concentrations of ground-level ozone can aggravate asthma, cause inflammation of lung tissue, decrease lung function, and impair the body's defenses against respiratory infection. The 15% ROP plan's control measures are expected to reduce VOC emissions in Clark and Floyd Counties by 17,215 pounds (lbs) per day. In this action, EPA is approving the above requested SIP revisions through a ``direct final'' rulemaking; the rationale for this approval is set forth below.