Wis. Admin. Code Department of Natural Resources § NR 257.12 - 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 1

Core with an annealing furnace scrubber BPT

Pollutant or pollutant property

Maximum for

any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium

0.0360

0.0147

Cyanide

0.0237

0.0098

Zinc

0.119

0.0498

Aluminum

0.525

0.257

Oil and grease

1.634

0.980

Suspended solids

3.348

1.593

pH

(1)

(1)

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

Table 2

Core without an annealing furnace scrubber BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium

0.0244

0.010

Cyanide

0.0161

0.0067

Zinc

0.0808

0.0338

Aluminum

0.356

0.174

Oil and grease

1.11

0.664

Suspended solids

2.27

1.079

pH

(1)

(1)

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

Table 3

Continuous sheet 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 sheet cast by continuous methods

Chromium

0.00086

0.00035

Cyanide

0.00057

0.00024

Zinc

0.0029

0.0012

Aluminum

0.0127

0.0063

Oil and grease

0.0393

0.0236

Suspended solids

0.805

0.0383

pH

(1)

(1)

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

Table 4

Solution heat treatment contact cooling water BPT

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

mg/off-kg (lb/ of million off-lbs)aluminu m 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

pH

315.91 (1)

150.25 (1)

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

Table 5

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

0.110

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 6

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

44.52

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 7

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 257.12
Cr. Register, November, 1989, No. 407, eff. 12-1-89.

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