Rules & Regulations of the State of Tennessee
Title 0400 - Environment and Conservation
Subtitle 0400-40 - Water Resources (WPC)
Chapter 0400-40-05 - Individual National Pollutant Discharge Elimination System (NPDES) Permits
Section 0400-40-05-.10 - WATER QUALITY-BASED PERMITTING

(1) Water quality-based effluent limitations shall be required for pollutants that would otherwise cause, or have the reasonable potential to cause or contribute to, a violation of the criteria established by the General Water Quality Criteria, Chapter 0400-40-03, as applicable.

(2) Effluent limitations on toxic substances will be required in accordance with the General Water Quality Criteria, Chapter 0400-40-03, using the LC50 and/or IC25 criteria and appropriate application factor for each toxic parameter.

(3) Appropriate limitations on organic related and other oxygen demanding parameters will be required in any permit to insure adequate dissolved oxygen in the state's waters in accordance with the General Water Quality Criteria, Chapter 0400-40-03.

(4) Water quality-based effluent limitations may be required in any permits to ensure compliance with the Antidegradation Statement, Rule 0400-40-03-.06.

(5) Water quality-based effluent limitations shall be consistent with the assumptions and requirements of any applicable wasteload allocation for the discharge established in a total maximum daily load (TMDL) approved or issued by the Administrator.