Section NR 211.10 - Prohibited discharge standards(1) Industrial users may not discharge pollutants into a POTW which pass through or interfere with the operation or performance of the POTW, and thereby cause or significantly contribute to a violation of the POTW's WPDES permit.(2) The following pollutants may not be introduced into a POTW: (a) Pollutants that create or contribute to a fire or explosion hazard in the POTW, including waste streams with a closed cup flashpoint of less than 140° F or 60° C using the test methods in s. NR 661.0021.(b) Pollutants which will cause or contribute to corrosive structural damage to the POTW but in no case discharges with a pH lower than 5.0, unless the POTW is specifically designed to accommodate such discharges.(c) Solid or viscous pollutants in amounts which will cause or contribute to obstruction to the flow in sewers or other interference with the operation of the POTW.(d) Any pollutant, including oxygen demanding pollutants, released in a discharge of such volume or strength as to cause or contribute to interference in the POTW.(e) Heat in amounts which will inhibit or contribute to the inhibition of biological activity in the POTW treatment plant resulting in interference or causing damage to the POTW but in no case heat in such quantities that the temperature exceeds 40°C (104°F) at the influent to the POTW treatment plant unless the department, at the request of the POTW, has approved alternate temperature limits.(f) Petroleum oil, nonbiodegradable cutting oil or products of mineral oil origin in amounts that will cause interference or pass through.(g) Pollutants which result in the presence of gases, vapors or fumes within the POTW in a quantity which may cause acute worker health or safety problems.(h) Any trucked or hauled pollutants, except at discharge points designated by the POTW.(3)(a) POTWs developing pretreatment programs under subchapter II shall develop specific prohibited discharge standards to enforce the general prohibitions of subs. (1) and (2). All other POTWs shall, where the contributions of industrial users result in pass-through or interference and the resulting permit violation is likely to recur, develop and enforce specific prohibited discharge standards which, together with appropriate POTW facility or operation changes, are necessary to ensure continued compliance with the POTW's WPDES permit. (b) This subsection is not intended to require pretreatment as a substitute for adequate municipal treatment.(c) Specific prohibited discharge standards may not be developed and enforced by the POTW without giving prior notice to persons or groups who have requested notice and an opportunity to respond.(d) Where specific prohibited discharge standards or limits on pollutants or pollutant parameters are developed by a POTW under this subsection, they shall be deemed pretreatment standards for the purposes of s. 283.21(2), Stats.(e) POTWs may develop best management practices to implement the prohibitions of subs. (1) and (2). Such BMPs shall be considered specific prohibited discharge standards under this subsection and pretreatment standards for the purposes of s. 283.21(2), Stats. (4) Except where expressly authorized to do so by an applicable pretreatment standard or requirement, no industrial user may increase the use of process water or in any other way attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with a pretreatment standard or requirement. The control authority may impose mass limitations on an industrial user to account for dilution or in any other situation for which the control authority finds mass limitations appropriate.Wis. Admin. Code Department of Natural Resources § NR 211.10
Cr. Register, July, 1983, No. 331, eff. 8-1-83; r. (1) (a) and (b), am. (2) (a), cr. (2) (f) to (h) and (4), Register, March, 1992, No. 435, eff. 4-1-92; correction in (2) (a) made under s. 13.92(4) (b) 7, Stats., Register May 2011 No. 665; CR 13-006: am. (3) (d), cr. (3) (e) Register January 2014 No. 697, eff. 2-1-14.Amended by, correction in (2) (a) made under s. 13.92(4) (b) 7., Stats., Register August 2020 No. 776, eff. 9/1/2020