EPA is approving revisions to the Knox County portion of the Tennessee State Implementation Plan (SIP) submitted by the State of Tennessee Department of Environment and Conservation on February 26, 1993, and June 23, 1998. The revisions add clarification to the section regarding exceptions to prohibition with a permit in the Open Burning rule by replacing the existing language in Section 16.3 with new language. Private residences and farming operations are defined in more detail as purposes for which open burning is allowed, and church congregational property is being added to excepted purposes. In addition, an open burning exemption is being removed from the permits chapter.