Approval and Promulgation of Implementation Plans; Tennessee: Approval of Revisions to the Knox County Portion of the Tennessee State Implementation Plan

EPA is taking direct final action to approve revisions to the Tennessee State Implementation Plan (SIP) submitted by the State of Tennessee, through the Tennessee Department of Environment and Conservation (TDEC), on December 21, 1999, March 15, 2000, and January 12, 2001. The revisions pertain to the Knox County portion of the Tennessee SIP and include changes to the Knox County Air Quality Regulations (KCAQR) Section 13.0--"Definitions" and Section 22.0-- "Regulation of Fugitive Dust and Materials." These revisions are part of Knox County's strategy to attain and maintain the national ambient air quality standards (NAAQS), and are considered by the TDEC to be at least as stringent as the State's requirements. This action is being taken pursuant to section 110 of the Clean Air Act (CAA).