Section NR 274.013 - 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) During any calender month, a process wastewater impoundment may discharge from the overflow a volume equivalent to whatever is the greatest of the following: (a) The difference between the precipitation for that month which falls within the impoundment and the evaporation from the impoundment for that month; or(b) The difference between the mean precipitation for that month which falls within the impoundment and the mean evaporation for that month as established for the impoundment's location by the national climatic center, national oceanic and atmospheric administration, or as otherwise established if no monthly evaporation has been determined by the national climatic center.Wis. Admin. Code Department of Natural Resources § NR 274.013
Cr. Register, March, 1991, No. 423, eff. 4-1-91.