Approval and Promulgation of Implementation Plans State: Approval of Revisions to the Knox County Portion of the State of Tennessee's State Implementation Plan (SIP)

EPA is approving revisions to the Knox County portion of the Tennessee State Implementation Plan (SIP) to allow the Knox County Department of Air Pollution Control (Knox County) to utilize permits- by-rule for the purpose of limiting potential to emit (PTE) criteria pollutants for certain source categories to less than the title V permitting major source thresholds. EPA is also approving under section 112(l) of the Clean Air Act several source categories of the submitted regulations for limiting PTE of hazardous air pollutants (HAP) to less than title V permitting major source thresholds. These permits-by-rule provide a way for sources to accept limitations on their operations without the added burden of obtaining source-specific permits for the following source categories: fuel-burning equipment burning natural gas/liquified petroleum gas (LPG) and/or distillate oil, fuel burning equipment burning natural gas/LPG and/or residual oil, on-site power generation, concrete mixing plants, coating operations, printing operations, and fiberglass molding and forming operations. On May 23, 1995, Knox County through the Tennessee Department of Environment and Conservation submitted a SIP revision fulfilling the requirements necessary to utilize exclusionary rules to limit PTE of air pollutants in a federally enforceable manner.