Wis. Admin. Code Department of Natural Resources § NR 257.35 - Pretreatment standards for existing sources

Current through March 28, 2022

Except as provided in ss. NR 211.13 and 211.14, any existing source subject to this subchapter which introduces pollutants into a POTW shall comply with ch. NR 211 and achieve the following pretreatment standards for existing sources. Degassing operations may not discharge wastewater pollutants.

Table 91

Core operation PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum extruded

Chromium

0.15

0.061

Cyanide

0.098

0.041

Zinc

0.49

0.21

TTO

0.23

Oil and grease (alternate monitoring parameter)

18.0

8.8

Table 92

Extrusion press leakage PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum extruded

Chromium

0.65

0.27

Cyanide

0.43

0.18

Zinc

2.16

0.90

TTO

1.02

Oil and grease (alternate monitoring parameter)

77.0

39.0

Table 93

Direct chill casting contact cooling water PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cast

Chromium

0.59

0.24

Cyanide

0.39

0.16

Zinc

1.94

0.81

TTO

0.92

Oil and grease (alternate monitoring parameter)

69.0

35.0

Table 94

Press heat treatment contact cooling water PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum quenched

Chromium

0.90

0.37

Cyanide

0.59

0.25

Zinc

2.98

1.25

TTO

1.41

Oil and grease (alternate monitoring parameter)

110.0

53.0

Table 95

Solution heat treatment contact cooling water PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum quenched

Chromium

0.90

0.37

Cyanide

0.59

0.25

Zinc

2.98

1.25

TTO

1.41

Oil and grease (alternate monitoring parameter)

110.0

53.0

Table 96

Cleaning or etching bath PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium

0.079

0.032

Cyanide

0.052

0.022

Zinc

0.26

0.109

TTO

0.124

Oil and grease (alternate monitoring parameter)

9.30

4.70

Table 97

Cleaning or etching rinse and hot water seal PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium

1.7

0.7

Cyanide

1.2

0.5

Zinc

5.7

2.4

TTO

2.7

Oil and grease (alternate monitoring parameter)

200.0

100.0

Table 98

Cleaning or etching scrubber liquor PSES

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium

0.85

0.35

Cyanide

0.56

0.23

Zinc

2.82

1.18

TTO

1.34

Oil and grease (alternate monitoring parameter)

100.0

50.0

Notes

Wis. Admin. Code Department of Natural Resources § NR 257.35
Cr. Register, November, 1989, No. 407, eff. 12-1-89.

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