NR 235.02(6)
(6) This chapter does not apply to wastewater discharges of chromium, copper, lead, nickel or zinc in complexed metal-bearing waste streams listed as follows:
Acid dyes
Azo acid dyes, including metallized azo acid dyes
Azo dye intermediates from substituted diazonium salts + coupling compounds
Metallized azo dyes from azo dye + metal acetate
Organic pigments, miscellaneous lakes and toners
Vat dyes
Acid dyes
Metallized azo dyes from azo dye + metal acetate
Direct dyes
Azo direct dyes
Disperse dyes
Disperse dye coupler from N-substitution of 2-amino-4-acetamidoanisole
Azo and vat disperse dyes
Organic pigments
Organic pigment green 7 from copper phthalocyanine
Organic pigments from phthalocyanine pigments
Organic pigments from copper phthalocyanine (blue crude)
Organic pigments, miscellaneous lakes and toners
Sulfur dyes
Vat dyes
Organic pigments, quinacridines
Organic pigments, thioindigoids
Tetraethyl lead from alkyl halide + sodium-lead alloy
Tetramethyl lead from alkyl halide + sodium-lead alloy
Metallized azo dyes from azo dye + metal acetate
Organic pigments from azo pigments by diazotization and coupling
NR 235.02(7)
(7) This chapter does not apply to discharges of cyanide in cyanide bearing waste streams listed in Appendix A if the department or control authority does the following:
NR 235.02(7)(a)
(a) Determines that the cyanide limitations and standards are not achievable due to elevated levels of non-amenable cyanide that is not oxidized by chlorine treatment, that result from the unavoidable complexing of cyanide at the process source of the cyanide-bearing waste stream.
NR 235.02(7)(b)
(b) Establishes an alternative total cyanide or amenable cyanide limitation that reflects the best available technology economically achievable.
NR 235.02(7)(c)
(c) Bases the determination under
par. (a) upon a review of relevant engineering, production and sampling and analysis information, including measurements of both total and amenable cyanide in the waste stream.
NR 235.02(7)(d)
(d) Analyzes the extent of complexing in the waste stream, based on the foregoing information, and its impact of cyanide treatability in writing and, for direct dischargers, contained in the fact sheet required by
40 CFR 124.8.
NR 235.02(8)
(8) Discharge limitations for chromium, copper, lead, nickel and zinc or discharge standards for lead and zinc may be established for waste streams not listed in Appendix A and not otherwise determined to be metal-bearing waste streams if the department or control authority determines that the wastewater metals contamination is due to background levels that are not reasonably avoidable from sources such as intake water, corrosion of construction materials or contamination of raw materials. The determination shall be based upon a review of relevant facility operating conditions, process chemistry, engineering and sampling and analysis information. An analysis of the sources and levels of the metals, based on the foregoing information, shall be in writing as follows:
NR 235.02(8)(a)2.
2. The department may establish limitations for chromium, copper, lead, nickel and zinc for non-metal-bearing waste streams between the lowest level which the permit writer determines based on professional judgment can be reliably measured and the concentrations of the metals present in the waste streams, but not to exceed the applicable limitations contained in
ss. NR 235.81 and
235.91.
NR 235.02(8)(a)3.
3. The applicable limitations for zinc which may not be exceeded are those appearing in the tables in
ss. NR 235.81 and
235.91, not the alternative limitations listed in footnote 2 to each of these tables.
NR 235.02(8)(b)1.
1. The control authority may establish standards for lead and zinc for non-”metal-bearing waste streams” between the lowest level which the control authority determines based on best professional judgment can be reliably measured and the concentration of the metals present in the waste streams, but not to exceed the applicable standards contained in
s. NR 235.99.
NR 235.02(8)(b)2.
2. The applicable standards for zinc which may not be exceeded are those appearing in the table in
s. NR 235.99 and not the alternative standards in footnote 2 to this table.
NR 235.02(8)(c)
(c) The limitations and standards for individual dischargers shall be set on a mass basis by multiplying the concentration allowance established by the department or control authority by the process wastewater flow from the individual waste streams for which incidental metals have been found to be present.
NR 235.02(9)
(9) Any existing or new source direct discharge point source subject to 2 or more of
subchs. II through
VIII shall achieve BOD
5 and TSS discharges not exceeding the quantity or mass determined by multiplying the total OCPSF process wastewater flow subject to
subchs. II to
VIII times the following OCPSF production-proportioned concentration: For a specific facility, w
x is the proportion of the facility's total OCPSF production in subcategory
X. Then the facility-specific production-proportioned concentration limitations are given by:
and
The “BOD5 LimitX” and “TSS LimitX” are the respective subcategorical BOD5 and the TSS maximum for any one day or maximum for monthly average limitations.
NR 235.02 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.03
NR 235.03
Definitions. In addition to the definitions in
ss. NR 205.03,
205.04 and
211.03, the following definitions apply to the terms used in this chapter:
NR 235.03(1)
(1) “Direct discharge” means the introduction of pollutants into waters of the state.
NR 235.03(2)
(2) “Existing source” means any point source, except a new source as defined in
sub. (4), from which pollutants are or may be discharged either to waters of the state or into a publicly owned treatment works.
NR 235.03(3)
(3) “Indirect discharge” means the introduction of pollutants into a publicly owned treatment works.
NR 235.03(4)
(4) “New source” means any point source for which the commencement of construction occurred after March 21, 1983, and from which pollutants are or may be discharged either to waters of the state or into a publicly owned treatment works.
NR 235.03(5)
(5) “OCPSF” means organic chemicals, plastics and synthetic fibers.
NR 235.03(7)
(7) “SIC” means U.S. department of commerce bureau of the census standard industrial classification.
NR 235.03 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.04(1)(1) Any existing source subject to this chapter which discharges to waters of the state shall achieve:
NR 235.04(1)(a)
(a) The effluent limitations representing BPT by July 1, 1977; and
NR 235.04(1)(b)
(b) The effluent limitations representing BAT by July 1, 1984.
NR 235.04(2)
(2) Any new source subject to this chapter which discharges to waters of the state shall achieve NSPS at the commencement of discharge.
NR 235.04(3)
(3) Any existing source subject to this chapter which introduces process wastewater pollutants into a POTW shall achieve PSES by the date for each parameter as listed in the following tables:
-
See PDF for table 
-
See PDF for table NR 235.04(4)
(4) Any new source subject to this chapter which introduces process wastewater pollutants into a POTW shall achieve PSNS at the commencement of discharge.
NR 235.04 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.10
NR 235.10
Applicability; description of the rayon fibers subcategory. This subchapter applies to process wastewater discharges resulting from the manufacture of rayon fiber by the viscose process only.
NR 235.10 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.11
NR 235.11
Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT). Except as provided in
40 CFR 125.30 to
125.32, and in
s. NR 235.02 (9) for point sources with production in 2 or more subcategories, any existing point source subject to this subchapter shall achieve the following limitations:
NR 235.11(1)
(1) Limitations shall be calculated by multiplying the following concentrations by the manufacturing process wastewater flow:
-
See PDF for table NR 235.11(2)
(2) The pH shall be within the range of 6.0 to 9.0 at all times.
NR 235.11 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.12
NR 235.12
Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). NR 235.12(1)(1) For existing point sources whose total OCPSF production defined by
s. NR 235.02 is less than or equal to 5 million pounds of OCPSF products per year, the BAT level of treatment shall be the same as the BPT level of treatment.
NR 235.12(2)
(2) Except as provided in
sub. (1) and in
40 CFR 125.30 to
125.32, any existing point source that uses end-of-pipe biological treatment and is subject to this subchapter shall achieve discharges in accordance with
s. NR 235.81.
NR 235.12(3)
(3) Except as provided in
sub. (1) and in
40 CFR 125.30 to
125.32, any existing point source that does not use end-of-pipe biological treatment and is subject to this subchapter shall achieve discharges in accordance with
s. NR 235.91.
NR 235.12 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.13
NR 235.13
New source performance standards (NSPS). NR 235.13(1)(1) Any new source that uses end-of-pipe biological treatment and is subject to this subchapter:
NR 235.13(2)
(2) Any new source that does not use end-of-pipe biological treatment and is subject to this section:
