The EPA is taking final action to approve the State Implementation Plan (SIP) revision concerning Kansas Air Regulation (K.A.R.) 28-19-79, Fuel Volatility, submitted by the Kansas Department of Health and Environment (KDHE). This revision sets a summertime gasoline Reid vapor pressure (RVP) limit of 7.2 pounds per square inch (psi), and 8.2 psi for gasoline containing at least 9.0 percent by volume but not more than 10.0 percent by volume ethanol, for gasoline distributed in Wyandotte and Johnson Counties in Kansas. This revision is necessary to ensure that the area continues to maintain the National Ambient Air Quality Standard (NAAQS) for ozone.