Section 274.042. Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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(1) Except as provided in 40 CFR 125.30 to 125.32 and sub. (2) , any existing point source subject to this primary copper smelting subchapter may not discharge process wastewater pollutants to waters of the state.

(2) A process wastewater impoundment which is designed, constructed, and operated to contain the precipitation from the 10-year, 24-hour rainfall event as established for the impoundment's location by the national climatic center, national oceanic and atmospheric administration, may discharge a volume of process wastewater equivalent to the volume of precipitation which falls within the impoundment in excess of the precipitation attributable to the 10-year, 24-hour rainfall event, when such an event occurs.

History: Cr. Register, March, 1991, No. 423 , eff. 4-1-91.

                    
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