Wis. Admin. Code Department of Natural Resources § NR 257.62 - Effluent limitations representing the degree of effluent reduction attainable by application of the best practicable control technology currently available

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 BPT:

Table 160

Core operation BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum drawn with emulsions or soaps

Chromium

0.205

0.084

Cyanide

0.135

0.056

Zinc

0.680

0.285

Aluminum

3.00

1.50

Oil and grease

9.33

5.60

Suspended solids

19.12

9.10

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 161

Continuous rod casting spent lubricant BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.0009

0.0004

Cyanide

0.0006

0.0003

Zinc

0.0029

0.001

Aluminum

0.013

0.007

Oil and grease

0.040

0.024

Suspended solids

0.081

0.039

PH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 162

Continuous rod casting contact cooling water BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.684

0.28

Cyanide

0.450

0.187

Zinc

2.27

0.949

Aluminum

10.00

4.976

Oil and grease

31.10

18.66

Suspended solids

63.76

30.323

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 163

Solution heat treatment contact cooling water BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

3.39

1.39

Cyanide

2.24

0.93

Zinc

11.25

4.70

Aluminum

49.55

24.66

Oil and grease

154.10

92.46

Suspended solids

315.91

150.25

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 164

Cleaning or etching bath BPT

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

0.573

Oil and grease

3.58

2.15

Suspended solids

7.34

3.49

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 165

Cleaning or etching rinse and hot water seal BPT

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

6.12

2.51

Cyanide

4.04

1.67

Zinc

20.31

8.49

Aluminum

89.46

44.519

Oil and grease

278.24

166.95

Suspended solids

570.39

271.29

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Table 166

Cleaning or etching scrubber liquor BPT

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

7.00

2.86

Cyanide

4.61

1.91

Zinc

23.22

9.70

Aluminum

102.24

50.88

Oil and grease

318.00

190.80

Suspended solids

651.90

310.05

pH

(1)

(1)

1 Within the range of 7.0 to 10 at all times.

Notes

Wis. Admin. Code Department of Natural Resources § NR 257.62
Cr. Register, November, 1989, No. 407, eff. 12-1-89.

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