Wis. Admin. Code Department of Natural Resources § NR 257.34 - New source performance standards

Current through March 28, 2022

Any new source subject to this subchapter shall achieve the following performance standards. Degassing operations may not discharge wastewater pollutants.

Table 83

Core operation NSPS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.13

0.051

Cyanide

0.068

0.027

Zinc

0.35

0.14

Aluminum

2.07

0.92

Oil and grease

3.39

3.39

Suspended solids

5.10

4.07

pH

(1)

(1)

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

Table 84

Extrusion press leakage NSPS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.11

0.045

Cyanide

0.060

0.024

Zinc

0.31

0.126

Aluminum

1.82

0.81

Oil and grease

2.98

2.98

Suspended solids

4.47

3.58

pH

(1)

(1)

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

Table 85

Direct chill casting contact cooling water NSPS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.4

0.20

Cyanide

0.27

0.11

Zinc

1.36

0.56

Aluminum

8.12

3.60

Oil and grease

13.29

13.29

Suspended solids

19.94

15.95

pH

(1)

(1)

1 The pH shall be maintained within the range of 7.0 to 10.0 at all times, except for those situations when this waste stream is discharged separately and without commingling with any other wastewater, in which case the pH shall be within the range of 6.0 to 10.0 at all times.

Table 86

Press heat treatment contact cooling water NSPS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.76

0.31

Cyanide

0.41

0.17

Zinc

2.08

0.86

Aluminum

12.45

5.52

Oil and grease

20.37

20.37

Suspended solids

30.56

24.45

pH

(1)

(1)

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

Table 87

Solution heat treatment contact cooling water NSPS

Pollutant or pollutant property

Maximum for any 1 day

Maximum for monthly average

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

Chromium

0.76

0.31

Cyanide

0.41

0.17

Zinc

2.08

0.86

Aluminum

12.45

5.52

Oil and grease

20.37

20.37

Suspended solids

30.56

24.45

pH

(1)

(1)

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

Table 88

Cleaning or etching bath NSPS

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

0.067

0.027

Cyanide

0.036

0.015

Zinc

0.183

0.075

Aluminum

1.094

0.485

Oil and grease

1.79

1.79

Suspended solids

2.69

2.15

pH

(1)

(1)

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

Table 89

Cleaning or etching rinse and hot water seal NSPS

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

0.52

0.21

Cyanide

0.28

0.11

Zinc

1.42

0.59

Aluminum

8.50

3.77

Oil and grease

13.91

13.91

Suspended solids

20.87

16.70

pH

(1)

(1)

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

Table 90

Cleaning or etching scrubber liquor NSPS

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

0.72

0.29

Cyanide

0.39

0.16

Zinc

1.97

0.81

Aluminum

11.81

5.24

Oil and grease

19.33

19.33

Suspended solids

29.00

23.20

pH

(1)

(1)

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

Notes

Wis. Admin. Code Department of Natural Resources § NR 257.34
Cr. Register, November, 1989, No. 407, eff. 12-1-89.

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