Wis. Admin. Code Department of Natural Resources § NR 257.33 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

Current through March 28, 2022

Except as provided in 40 CFR 125.30 to 125.32, any existing point source subject to this subchapter shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of BAT. Degassing operations may not discharge wastewater pollutants.

Table 75

Core operation BAT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

1.7

0.7

Cyanide

1.2

0.5

Zinc

5.7

2.4

Aluminum

25.0

13.0

Table 76

Extrusion press leakage BAT

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

Aluminum

9.51

4.73

Table 77

Direct chill casting contact cooling water BAT

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

Aluminum

8.55

4.26

Table 78

Press heat treatment contact cooling water BAT

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

Aluminum

13.10

6.52

Table 79

Solution heat treatment contact cooling water BAT

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

Aluminum

13.10

6.52

Table 80

Cleaning or etching bath BAT

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

0.262

0.109

Aluminum

1.15

0.58

Table 81

Cleaning or etching rinse and hot water seal BAT

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

Aluminum

25.0

13.0

Table 82

Cleaning or etching scrubber liquor BAT

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

Aluminum

12.43

6.19

Notes

Wis. Admin. Code Department of Natural Resources § NR 257.33
Cr. Register, November, 1989, No. 407, eff. 12-1-89.

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