Wis. Admin. Code Department of Natural Resources NR 262.21

Current through August 26, 2024

Section NR 262.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:

(1) There may not be discharge of process wastewater pollutants from metal preparation operations.

(2) The discharge of process wastewater pollutants from all porcelain enameling coating operations may not exceed the values set forth below:

BPT effluent limitations

Pollutant or pollutant property	Maximum for any 1 day		Maximum for monthly average
mg/m2 (Pounds per million ft2) of area coated
Chromium . ..	0.29	(0.06)	0.12	(0.024)
Lead ........	0.11	(0.02)	0.09	(0.02)
Nickel .......	0.98	(0.02)	0.7	(0.15)
Zinc ........	0.93	(0.19)	0.39	(0.08)
Aluminum . ..	3.16	(0.65)	1.29	(0.27)
Iron .........	0.86	(0.18)	0.44	(0.09)
Oil and grease.	13.86	(2.48)	8.32	(1.71)
TSS .........	28.42	(5.82)	13.86	(2.84)
pH ..........	(1)	(1)	(1)	(1)

¹Within the range 7.5 to 10.0.

Wis. Admin. Code Department of Natural Resources NR 262.21

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