Section NR 230.023 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable(1) Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by application of BAT.(2) Except as provided in sub. (3), process wastewater pollutants may not be discharged to waters of the state.(3) If a process wastewater impoundment is designed, constructed, and operated to contain the precipitation from the 25-year, 24-hour rainfall event as established for the impoundment's location by the national climatic center, national oceanic and atmospheric administration, the impoundment may discharge a volume of process wastewater equivalent to the volume of precipitation which falls within the impoundment in excess of that attributable to the 25-year, 24-hour rainfall event, when such an event occurs.Wis. Admin. Code Department of Natural Resources NR 230.023
Cr. Register, September, 1990, No. 417, eff. 10-1-90.