Section NR 261.22 - Discharge standards(1) PRETREATMENT STANDARDS FOR EXISTING SOURCES (PSES).(a) Except as provided in par. (b), any existing source subject to this subchapter shall comply with ch. NR 211 and achieve, by February 15, 1986, the following pretreatment standards for existing sources: Table 4
PSES (mg/l)
Pollutant or pollutant property1 | 1 day max. | monthly avg. |
Cadmium (Cd) | 0.69 | 0.26 |
Chromium (Cr) | 2.77 | 1.71 |
Copper (Cu) | 3.38 | 2.07 |
Lead (Pb) | 0.69 | 0.43 |
Nickel (Ni) | 3.98 | 2.38 |
Silver (Ag) | 0.43 | 0.24 |
Zinc (Zn) | 2.61 | 1.48 |
Cyanide (CN) | 1.20 | 0.65 |
Total Toxic Organics (TTO) | 4.57 (by June 30, 1984)2 | ---- |
2.13 (by Feb. 15, 1986) | ---- |
1All metals and cyanide shall be determined in "total" form.
2Metal finishing facilities which are covered by ch. NR 254 shall comply with the 4.57 mg/l TTO limitation by July 10, 1985.
(b) For facilities with cyanide treatment, and upon approval of the control authority, an amenable cyanide limit (Cyanide, A) of 0.86 milligrams per liter (1 day max.) and 0.32 milligrams per liter (monthly avg.) may apply in place of the total cyanide limit specified in Table 4.(c) No discharger subject to the provisions of this subchapter 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.(2) PRETREATMENT STANDARDS FOR NEW SOURCES (PSNS).(a) Except as provided in par. (b), any new source subject to this subchapter shall comply with ch. NR 211 and achieve, at the commencement of discharge, the following pretreatment standards for new sources: Table 5
PSNS (mg/l)
Pollutant or pollutant property1 | 1 day max. | monthly avg. |
Cadmium (Cd) | 0.11 | 0.07 |
Chromium (Cr) | 2.77 | 1.71 |
Copper (Cu) | 3.38 | 2.07 |
Lead (Pb) | 0.69 | 0.43 |
Nickel (Ni) | 3.98 | 2.38 |
Silver (Ag) | 0.43 | 0.24 |
Zinc (Zn) | 2.61 | 1.48 |
Cyanide (CN) | 1.20 | 0.65 |
Total Toxic Organics (TTO) | 2.13 | ---- |
1All metals and cyanide shall be determined in "total" form.
(b) For facilities with cyanide treatment, and upon approval of the control authority, an amenable cyanide limit (Cyanide, A) of 0.86 milligrams per liter (1 day max.) and 0.32 milligrams per liter (monthly avg.) may apply in place of the total cyanide limit specified in Table 5.(c) No discharger subject to the provisions of this subchapter 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.Wis. Admin. Code Department of Natural Resources NR 261.22
Cr. Register, October, 1986, No. 370, eff. 11-1-86.