19-5-116 - Limitation on effluent limitation standards for BOD, SS, Coliforms, and pH for domestic or municipal sewage.
19-5-116. Limitation on effluent limitation standards for BOD, SS, Coliforms, andpH for domestic or municipal sewage.
Unless required to meet instream water quality standards or federal requirementsestablished under the federal Water Pollution Control Act, the board shall not establish, underSection 19-5-104, effluent limitation standards for Biochemical Oxygen Demand (BOD), TotalSuspended Solids (SS), Coliforms, and pH for domestic or municipal sewage which are morestringent than the following:
(1) Biochemical Oxygen Demand (BOD): The arithmetic mean of BOD valuesdetermined on effluent samples collected during any 30-day period shall not exceed 25 mg/l, norshall the arithmetic mean exceed 35 mg/l during any seven-day period.
(2) Total Suspended Solids (SS): The arithmetic mean of SS values determined oneffluent samples collected during any 30-day period shall not exceed 25 mg/l, nor shall thearithmetic mean exceed 35 mg/l during any seven-day period.
(3) Coliform: The geometric mean of total coliforms and fecal coliform bacteria ineffluent samples collected during any 30-day period shall not exceed either 2000/100 ml for totalcoliforms or 200/100 ml for fecal coliforms. The geometric mean during any seven-day periodshall not exceed 2500/100 ml for total coliforms or 250/100 for fecal coliforms.
(4) pH: The pH level shall be maintained at a level not less than 6.5 or greater than 9.0.
Renumbered and Amended by Chapter 112, 1991 General Session