Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 235 - Organic chemical manufacturing › Subchapter IX - Pipe Biological Treatment › Section NR 235.81 - Toxic pollutant effluent limitations and standards for direct discharge point sources that use end-of-pipe biological treatment

Current through June 24, 2024
(1) Any point
				  source subject to this subchapter must achieve discharges not exceeding the
				  quantity determined by multiplying the process wastewater flow times the
				  concentrations in the following table.
(2) For chromium, copper, lead, nickel, zinc
				  and total cyanide:
(a) The discharge quantity
				  shall be determined by multiplying the concentrations listed in the following
				  table for these pollutants times the flow from the metal-bearing waste streams
				  for the metals and times the flow from the cyanide bearing waste streams for
				  total cyanide.
(b) The
				  metal-bearing waste streams and cyanide-bearing waste streams are defined as:
1. Those waste streams listed in Appendix
				  A.
2. Any additional OCPSF process
				  wastewater streams identified by the permitting authority on a case-by-case
				  basis as metal or cyanide bearing based upon a determination that such streams
				  contain significant amounts of the pollutants identified above.
(c) Any streams designated under
				  par. (b) 2. shall be treated independently of other metal or cyanide bearing
				  waste streams unless the permitting authority determines that the combination
				  of such streams, prior to treatment, with the Appendix A waste streams will
				  result in substantial reduction of these pollutants. This determination shall
				  be based upon a review of relevant engineering, production and sampling
				  information.
Sources Using End of Pipe Biological Treatment
BAT Effluent Limitations and
								  NSPS1
Maximum for any 1 day
Maximum for monthly
average
Pollutant or pollutant property
µg/l
µg/l
Acenaphthene
59
22
Acenaphthylene
59
22
Acrylonitrile
242
96
Anthracene
59
22
Benzene
136
37
Benzo(a)anthracene
59
22
3,4-Benzofluoranthene
61
23
Benzo(k)fluoranthene
59
22
Benzo(a)pyrene
61
23
Bis(2-ethylhexyl)phthalate
279
103
Carbon tetrachloride
38
18
Chlorobenzene
28
15
Chloroethane
268
104
Chloroform
46
21
2-Chlorophenol
98
31
Chrysene
59
22
Di-n-butyl phthalate
57
27
1,2-Dichlorobenzene
163
77
1,3-Dichlorobenzene
44
31
1,4-Dichlorobenzene
28
15
1,1-Dichloroethane
59
22
1,2-Dichloroethane
211
68
1,1-Dichloroethylene
25
16
1,2-trans-Dichloroethylene
54
21
2,4-Dichlorophenol
112
39
1,2-Dichloropropane
230
153
1,3-Dichloropropylene
44
29
Diethyl phthalate
203
81
2,4-Dimethylphenol
36
18
Dimethyl phthalate
47
19
4,6-Dinitro-o-cresol
277
78
2,4-Dinitrophenol
123
71
2,4-Dinitrotoluene
285
113
2,6-Dinitrotoluene
641
255
Ethylbenzene
108
32
Fluoranthene
68
25
Fluorene
59
22
Hexachlorobenzene
28
15
Hexachlorobutadiene
49
20
Hexachloroethane
54
21
Methyl chloride
190
86
Methylene chloride
89
40
Naphthalene
59
22
Nitrobenzene
68
27
2-Nitrophenol
69
41
4-Nitrophenol
124
72
Phenanthrene
59
22
Phenol
26
15
Pyrene
67
25
Tetrachloroethylene
56
22
Toluene
80
26
Total Chromium
2,770
1,110
Total Copper
3,380
1,450
Total Cyanide
1,200
420
Total Lead
690
320
Total Nickel
3,980
1,690
Total Zinc2
2,610
1,050
1,2,4-Trichlorobenzene
140
68
1,1,1-Trichloroethane
54
21
1,1,2-Trichloroethane
54
21
Trichloroethylene
54
21
Vinyl Chloride
268
104
1All units are micrograms per
					 liter.
2Total zinc for rayon fiber
					 manufacture that uses the viscose process and acrylic fiber manufacture that
					 uses the zinc chloride/solvent process is 6,796 mg/l maximum for any one day
					 and 3,325 mg/l maximum for monthly average.