Subchapter VI - Commodity Organic Chemicals
NR 235.50 Applicability; description of the commodity organic chemicals subcategory.
NR 235.51 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
NR 235.52 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
NR 235.53 New source performance standards (NSPS).
NR 235.54 Pretreatment standards for existing sources (PSES).
NR 235.55 Pretreatment standards for new sources (PSNS).
Subchapter VII - Bulk Organic Chemicals
NR 235.60 Applicability; description of the bulk organic chemicals subcategory.
NR 235.61 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
NR 235.62 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
NR 235.63 New source performance standards (NSPS).
NR 235.64 Pretreatment standards for existing sources (PSES).
NR 235.65 Pretreatment standards for new sources (PSNS).
Subchapter VIII - Specialty Organic Chemicals
NR 235.70 Applicability; description of the specialty organic chemicals subcategory.
NR 235.71 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).
NR 235.72 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
NR 235.73 New source performance standards (NSPS).
NR 235.74 Pretreatment standards for existing sources (PSES).
NR 235.75 Pretreatment standards for new sources (PSNS).
Subchapter IX - Direct Discharge Point Sources That Use End-Of-Pipe Biological Treatment
NR 235.80 Applicability; description of the subcategory of direct discharge point sources that use end-of-pipe biological treatment.
NR 235.81 Toxic pollutant effluent limitations and standards for direct discharge point sources that use end-of-pipe biological treatment.
Subchapter X - Direct Discharge Point Sources That Do Not Use End-of-Pipe Biological Treatment
NR 235.90 Applicability; description of the subcategory of direct discharge point sources that do not use end-of-pipe biological treatment.
NR 235.91 Toxic pollutant effluent limitations and standards for direct discharge point sources that do not use end-of-pipe biological treatment.
Subchapter XI - Indirect Discharge Point Sources
NR 235.98 Applicability; description of the subcategory of indirect discharge point sources.
NR 235.99 Toxic pollutant standards for indirect discharge point sources.
Ch. NR 235 Note
Note: Chapter NR 235 as it existed on March 31, 1997, was repealed and a new chapter NR 235 was created, Register, March, 1997, No. 495, eff. 4-1-97. NR 235.01
NR 235.01
Purpose. The purpose of this chapter is to establish effluent limitations, performance standards and pretreatment standards for discharges of process wastes from the organic chemicals, plastics and synthetic fibers point source category and its subcategories.
NR 235.01 History
History: Cr. Register, March, 1997, No. 495, eff. 4-1-97. NR 235.02(1)(1) This chapter applies to process wastewater discharges from all facilities or portions of facilities that manufacture the organic chemicals, plastics and synthetic fibers (OCPSF) products or product groups covered by
subchs. II to
VIII and are included within the following U.S. department of commerce bureau of the census standard industrial classification (SIC) groups:
NR 235.02(1)(a)
(a) SIC 2821 - Plastic materials, synthetic resins and nonvulcanizable elastomers.
NR 235.02(1)(c)
(c) SIC 2824 - Synthetic organic fibers, except cellulosic.
NR 235.02(1)(d)
(d) SIC 2865 - Cyclic crudes and intermediates, dyes and organic pigments.
NR 235.02(1)(e)
(e) SIC 2869 - Industrial organic chemicals, not elsewhere classified.
NR 235.02(2)
(2) This chapter applies to wastewater discharges from OCPSF research and development, pilot plant, technical service and laboratory bench scale operations if these operations are conducted in conjunction with and related to existing OCPSF manufacturing activities at the facility site.
NR 235.02(3)
(3) This chapter does not apply to discharges resulting from the manufacture of OCPSF products included in the following SIC subgroups, if a facility has reported under the following subgroups rather than under the SIC groups listed in
sub. (1):
NR 235.02(3)(c)
(c) Chemicals and chemical preparations, not elsewhere classified:
NR 235.02(3)(c)2.
2. SIC 2899597 - other industrial chemical specialties, including fluxes, plastic wood preparations and embalming fluids.
NR 235.02(3)(d)
(d) SIC 2911058 - aromatic hydrocarbons manufactured from purchased refinery products.
NR 235.02(3)(e)
(e) SIC 2911632 - aliphatic hydrocarbons manufactured from purchased refinery products.
NR 235.02(4)
(4) This chapter does not apply to discharges for which a different set of previously promulgated effluent limitations guidelines and standards apply, unless the facility reports OCPSF products under SIC codes 2821, 2865 or 2869, and the facility's OCPSF wastewaters are treated in a separate treatment system or discharged separately to a POTW.
NR 235.02(5)
(5) This chapter does not apply to any process wastewater discharges from the manufacture of organic chemical compounds solely by extraction from plant and animal raw materials or by fermentation processes.
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.
