On November 21, 2001, the South Carolina Department of Health and Environmental Control submitted revisions to the South Carolina State Implementation Plan (SIP). These revisions include the amending of volatile organic compounds (VOC's), prevention of significant deterioration (PSD), and other miscellaneous regulations. The purpose of these revisions is to make the revised regulations consistent with the requirements of the Clean Air Act as amended in 1990. The EPA is approving these revisions.