EPA is conditionally approving the 1998 revisions to the Kansas City ozone maintenance plan as a revision to the Kansas State Implementation Plan (SIP). Full approval is contingent upon Kansas' submission of additional, enforceable control measures. The Kansas City ozone maintenance area experienced a violation of the National Ambient Air Quality Standard (NAAQS) for ozone in 1995. In response to this violation, Kansas submitted revisions to its ozone maintenance plan. These revisions pertain to the implementation of control strategies to achieve reductions in volatile organic compound (VOC) emissions within the Kansas portion of the Kansas City ozone maintenance area. A major purpose of these revisions is to provide a more flexible approach to maintenance of acceptable air quality levels in Kansas City, while achieving emission reductions equivalent to those required by the previously approved plan. In a separate Federal Register document published today, EPA is also conditionally approving a similar plan submitted by the Missouri Department of Natural Resources (MDNR) to address the Missouri portions of the ozone maintenance area.