Section 260.22. Discharge standards.

 

(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 - See PDF for table

(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 wast ewater the following limitations shall apply:

Table 2
Facilities discharging 38,000 liters or more
per day PSES limitations (mg/l)
All subcategories - See PDF for table

(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 - operation 1 )
- See PDF for table

(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 Limits 1
Facilities discharging 38,000 liters or more
per day PSES limitations (mg/l)
All subcategories - See PDF for table

(2)  Where electroplating process wastewaters are combined with regulated wastewaters which have 30-day average standards, the corresponding 30-day average standard for the electroplating wastewaters shall be used. The 30-day average for pollutants may be found in Tables 1 through 4.

History: Cr. Register, October, 1986, No. 370 , eff. 11-1-86.