Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 260 - Electroplating › Subchapter II - Indirect Discharges › Section NR 260.22 - Discharge standards

Current through June 24, 2024
(1) Any existing source which introduces
				  pollutants into a publicly owned treatment works shall comply with ch. NR 211
				  and achieve the following pretreatment standards for existing sources (PSES).
				  The subcategories referred to in Tables 1 through 4 are those process
				  subcategories listed in s.
				  NR
				  260.02(1).
(a) No industrial user introducing wastewater
				  pollutants into a publicly owned treatment works under the provisions of this
				  chapter may augment the use of process wastewater or otherwise dilute the
				  wastewater as a partial or total substitute for adequate treatment to achieve
				  compliance with this standard.
(b)
				  For facilities discharging less than 38,000 liters (10,000 gal.) per calendar
				  day of electroplating process wastewater the following limitations shall apply:
Table 1
Facilities discharging less than 38,000 liters
per day PSES limitations (mg/l)
All subcategories
Pollutant or pollutant
1 day max.
4 day avg.2
30 day avg.3
property1
Cyanide, A
5.0
2.7
1.5
(CN, A)
Lead (Pb)
0.6
0.4
0.3
Cadmium (Cd)
1.2
0.7
.5
Total Toxic Organics (TTO)
4.57
1 All metals shall be determined
					 in "total" form.
2 Average of daily values for 4
					 consecutive monitoring days.
3 Limitations for integrated
					 facilities using the combined wastestream formula as set forth in s. NR 21
					 1.12.
(c) Except as
				  provided in pars. (d) and (e), for facilities discharging 38,000 liters (10,000
				  gal.) or more per calendar day of electroplating process wastewater the
				  following limitations shall apply:
Table 2
Facilities discharging 38,000 liters or more
per day PSES limitations (mg/l)
All subcategories
Pollutant or pollutant
								  property1
1 day max.
4 day avg.2
30 day avg.3
Silver (Ag)4
1.2
0.7
.5
Cyanide (CN)
1.9
1.0
.55
Copper (Cu)
4.5
2.7
1.8
Nickel (Ni)
4.1
2.6
1.8
Chromium (Cr)
7.0
4.0
2.5
Zinc (Zn)
4.2
2.6
1.8
Lead (Pb)
0.6
0.4
0.3
Cadmium (Cd)
1.2
0.7
.5
Total Metals5
10.5
6.8
5.0
Total Toxic
Organics
(TTO)
2.13
1 All metals and cyanide shall
					 be determined in ''total" form.
2 Average of daily values for 4
					 consecutive monitoring days.
3 Limitations for integrated
					 facilities using the combined wastestream formula as set forth in s. NR 21
					 1.12.
4 Applicable to subcategory (b)
					 only - Electroplating of precious metals.
5 Total Metals equals the sum of the
					 concentrations of copper , nickel, chro - mium and zinc.
(d) The following optional mass based
				  limitations are equivalent to and may apply in place of those outlined in Table
				  2 if there has been a prior agreement between the facility and the publicly
				  owned treatment works receiving such regulated wastes:
Table 3
Optional Mass Limits
Facilities discharging 38,000 liters or more
per day PSES limitations (mg/sq m -
					 operation1)
Subcategories (a) to (g)
Subcategory (h)
Pollutant or
pollutant
property2
1 day max.
4 day
avg.3
30 day
avg.4
1day max.
4 day avg.3
30 day
avg.4
Silver (Ag)5
47
29
20
Cyanide
(CN)
74
39
21
169
89
49
Copper (Cu)
176
105
70
401
241
160
Nickel (Ni)
160
100
70
365
229
160
Chromium
(Cr)
273
156
96
623
357
223
Zinc (Zn)
164
102
70
374
232
160
Lead (Pb)
23
16
13
53
36
27
Cadmium
(Cd)
47
29
20
107
65
45
Total Metals6
410
267
195
935
609
445
Total Toxic Organics
(TTO)7
2.13
2.13
1 The area plated or acted upon
					 by the processes described in ss.
					 NR
					 260.02(1) and
					 260.03(3) which are
					 expressed in square meters.
2 All metals and cyanide shall be
					 determined in ' 'total" form.
3 Average of daily values for 4
					 consecutive monitoring days.
4 Limitations for integrated
					 facilities using the combined wastestream formula as set forth in s. NR 21
					 1.12.
5 Applicable to subcategory (b) only
					 - Electroplating of precious metals.
6 Total Metals equals the sum of
					 the masses of copper , nickel, chromium and zinc.
7 TTO shall be measured by
					 mg/l.
(e) In the absence of
				  strong chelating agents, after reduction of hexavalent chromium wastes, and
				  after neutralization using calcium oxide (or hydroxide), the following control
				  program may be elected by the industrial user, with the approval of the control
				  authority, in place of the limitations in Table 2. These optional pollutant
				  limitations are not eligible for allowance for removal achieved by the publicly
				  owned treatment works.
Table 4
Optional Control Program
					 Limits1
Facilities discharging 38,000 liters or more
per day PSES limitations (mg/l)
All subcategories
Pollutant or pollutant
1 day max.
4 day avg.3
30 day avg.4
property2
Cyanide (CN)
1.9
1.0
.55
Lead (Pb)
0.6
0.4
0.3
Cadmium (Cd)
1.2
0.7
.5
Total Suspended Solids (TSS)
20.0
13.4
10.0
pH5
7.5 - 10.0
7.5 - 10.0
Total Toxic
Organics
(TTO)
2.13
1 Optional pollutants agreed
					 upon by facility and control authority.
2 All metals and cyanide shall
					 be determined in ''total" form.
3 A verage of daily values for
					 4 consecutive monitoring days.
4 Limitations for integrated
					 facilities using the combined wastestream formula as set forth in s. NR 21
					 1.12.
5 pH shall be measured in
					 standard units.