Chapter NR 237

NR 237.07 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.08 NR 237.08 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

NR 237.08(1) (1)  Existing source. Except as provided in 40 CFR 125.30 to 125.32, any existing source subject to this chapter shall achieve the effluent limitations set forth in subs. (2), (3) and (4) representing the degree of effluent reduction attainable by the application of BPT.

NR 237.08(2) (2) Biological oxygen demand and chemical oxygen demand.

NR 237.08(2)(a) (a) Except as provided in par. (c), the limitation for the daily average mass of BOD5 and COD for any calendar month shall be calculated by multiplying the long term daily average raw waste load by a variability factor and the difference between 1 and the required fractional reduction as given in the following table: - See PDF for table

NR 237.08(2)(b) (b) The limitations for BOD5 and COD shall be expressed in mass per unit time.

NR 237.08(2)(c) (c) Extraction operations and mixing, compounding, and formulation operations are not required to reduce the maximum 30-day average BOD5 concentration to less than 45 mg/l or reduce the maximum 30-day average COD concentration to less than 220 mg/l.

NR 237.08(2)(d) (d)

NR 237.08(2)(d)1. 1. For fermentation operations, calculation of raw waste loads of BOD5 and COD shall exclude any waste load associated with separable mycelia and solvents in those waste loads, except that residual amounts of solvents remaining after solvent recovery, separate disposal, or reuse may be included in the raw waste load. Removal, disposal, and reuse includes physical separation and removal of separable mycelia, recovery of solvents from waste streams, incineration of concentrated solvent waste streams, incineration of tar still bottoms, and broth concentration for disposal other than to the treatment system.

NR 237.08(2)(d)2. 2. For extraction, chemical synthesis, and mixing, compounding, and formulation operations, calculation of raw waste loads of BOD5 and COD shall exclude any waste load associated with solvents in those waste loads, except that residual amounts of solvents remaining after solvent recovery, separate disposal, or reuse may be included in the raw waste load. Removal, disposal, and reuse includes recovery of solvents from waste streams and incineration of concentrated solvent waste streams and incineration of tar still bottoms.

NR 237.08(3) (3) Total suspended solids. The TSS BPT effluent limitation shall be calculated by multiplying the BOD5 limitation, as calculated in sub. (2), by 1.7.

NR 237.08(4) (4) Cyanide and pH. The following limitations for cyanide and pH apply: - See PDF for table

NR 237.08 Note (1) This applies only to those plants using or generating cyanide and to discharges not resulting from research.

NR 237.08 Note (2) Within the range of 6.0 to 9.0.

NR 237.08 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.09 NR 237.09 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

NR 237.09(1) (1) Except as provided in 40 CFR 125.30 to 125.32 and sub. (2), any existing source subject to this chapter which uses or generates cyanide shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of BAT: - See PDF for table

NR 237.09(2) (2) This section does not apply to discharges resulting from pharmaceutical research at facilities which do not manufacture pharmaceuticals.

NR 237.09 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.10 NR 237.10 New source performance standards.

NR 237.10(1) (1) Except as provided in sub. (2), any new source subject to this chapter shall achieve the following standards: - See PDF for table

NR 237.10(2) (2) This section does not apply to discharges resulting from
pharmaceutical research at facilities which do not manufacture pharmaceuticals.

NR 237.10 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.11 NR 237.11 Pretreatment standards for existing sources.

NR 237.11(1) (1) Except as provided in ss. NR 211.13 and 211.14 and sub. (2), any existing source subject to this chapter which introduces pollutants into a POTW and which uses or generates cyanide shall comply with ch. NR 211 and achieve the following PSES: - See PDF for table

NR 237.11(2) (2) This section does not apply to discharges resulting from pharmaceutical research at facilities which do not manufacture pharmaceuticals.

NR 237.11 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.12 NR 237.12 Pretreatment standards for new sources.

NR 237.12(1) (1) Except as provided in s. NR 211.13 and sub. (2), any existing source subject to this chapter which introduces pollutants into a POTW and which uses or generates cyanide shall achieve the standards set forth in s. NR 237.11.

NR 237.12(2) (2) This section does not apply to discharges resulting from pharmaceutical research at facilities which do not manufacture pharmaceuticals.

NR 237.12 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.13 NR 237.13 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology.

NR 237.13(1) (1) Except as provided in 40 CFR 125.30 to 125.32 and sub. (2), any existing source subject to this chapter shall achieve the effluent limitations set forth in s. NR 237.09 for BOD5, TSS, and pH.

NR 237.13(2) (2) This section does not apply to discharges resulting from pharmaceutical research at facilities which do not manufacture pharmaceuticals.

NR 237.13 History History: Cr. Register, May, 1990, No. 413, eff. 6-1-90.

NR 237.13 Note Note: The Wisconsin administrative code corresponds to the code of federal regulations as cross referenced in the following table: - See PDF for table