Wis. Admin. Code Department of Natural Resources § NR 274.262 - Effluent limitations representing the degree of effluent reduction attainable by the 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 application of BPT:

Table 26-1

Secondary Precious Metals Furnace Wet Air Pollution Control

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of precious metals,

including silver, incinerated or

smelted

Copper

136.400

71.800

Cyanide

20.820

8.616

Zinc

104.800

43.800

Ammonia (as N)

9,571.000

4,207.000

Combined metals

21.54

Total suspended solids

2,944.000

1,400.000

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-2

Secondary Precious Metals Raw Material Granulation

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of precious metal in the granulated raw material

Copper

12.050

6.340

Cyanide

1.839

0.761

Zinc

9.256

3.867

Ammonia (as N)

845.100

371.500

Combined metals

1.902

Total suspended solids

259.900

123.600

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-3

Secondary Precious Metals Spent Plating Solutions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/liter of spent plating solution used as a raw material

Copper

1.900

1.000

Cyanide

0.290

0.120

Zinc

1.460

0.610

Ammonia (as N)

133.300

58.600

Combined metals

0.300

Total suspended solids

41.000

19.500

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-4

Secondary Precious Metals Spent Cyanide Stripping Solutions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold produced by cyanide stripping

Copper

7.030

3.700

Cyanide

1.073

0.444

Zinc

5.402

2.257

Ammonia (as N)

493.200

216.800

Combined metals

1.110

Total suspended solids

151.700

72.150

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-5

Secondary Precious Metals Refinery Wet Air Pollution Control(1)

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of precious metals,

including silver, produced in the

refinery

Copper

39.900

21.000

Cyanide

6.090

2.520

Zinc

30.660

12.810

Ammonia (as N)

2,799.000

1,231.000

Combined metals

6.300

Total suspended solids

861.000

409.500

pH

(2)

(2)

(1) This allowance applies to either acid or alkaline wet air pollution control scrubbers. If both acid and alkaline wet air pollution control scrubbers are present in a particular facility, the same allowance applies to each.

(2) Within the range of 7.5 to 10.0 at all times.

Table 26-6

Secondary Precious Metals Gold Solvent Extraction Raffinate and Wash Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold produced by solvent extraction

Copper

1.197

0.630

Cyanide

0.183

0.076

Zinc

0.920

0.384

Ammonia (as N)

83.980

36.920

Combined metals

0.189

Total suspended solids

25.830

12.290

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-7

Secondary Precious Metals Gold Spent Electrolyte

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold produced by electrolysis

Copper

0.017

0.009

Cyanide

0.003

0.001

Zinc

0.103

0.005

Ammonia (as N)

0.160

0.510

Combined metals

0.003

Total suspended solids

0.357

0.170

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-8

Secondary Precious Metals Gold Precipitation and Filtration

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold precipitated

Copper

8.360

4.400

Cyanide

1.276

0.528

Zinc

6.424

2.684

Ammonia (as N)

586.500

257.800

Combined metals

1.320

Total suspended solids

180.400

85.800

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-9

Secondary Precious Metals Platinum Precipitation and Filtration

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of platinum precipitated

Copper

9.880

5.200

Cyanide

1.508

0.624

Zinc

7.592

3.172

Ammonia (as N)

693.200

304.700

Combined metals

1.560

Total suspended solids

213.200

101.400

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-10

Secondary Precious Metals Palladium Precipitation and Filtration

BPT E

ffluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of palladium precipitated

Copper

11.400

6.000

Cyanide

1.740

0.720

Zinc

8.760

3.660

Ammonia (as N)

799.800

351.600

Combined metals

1.800

Total suspended solids

246.000

117.000

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-11

Secondary Precious Metals Other Platinum Group Metals Precipitation and Filtration

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of other platinum group metals precipitated

Copper

9.880

5.200

Cyanide

1.508

0.624

Zinc

7.592

3.172

Ammonia (as N)

693.200

304.700

Combined metals

1.560

Total suspended solids

213.200

101.400

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-12

Secondary Precious Metals Spent Solution for PGC Salt Production

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold contained in PGC product

Copper

1.710

0.900

Cyanide

0.261

0.108

Zinc

1.314

0.549

Ammonia (as N)

120.000

52.740

Combined metals

0.270

Total suspended solids

36.900

17.550

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-13

Secondary Precious Metals Equipment and Floor Wash

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of precious metals, including silver, produced in the refinery

Copper

0.000

0.000

Cyanide

0.000

0.000

Zinc

0.000

0.000

Ammonia (as N)

0.000

0.000

Combined metals

0.000

0.000

Total suspended solids

0.000

0.000

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Table 26-14

Secondary Precious Metals Preliminary Treatment

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of precious metals, metals produced through this operation

Copper

95.000

50.000

Cyanide

14.500

6.000

Zinc

73.000

30.500

Ammonia (as N)

6,665.000

2,930.000

Combined metals

15.000

Total suspended solids

2,050.000

975.000

pH

(1)

(1)

(1) Within the range of 7.5 to 10.0 at all times.

Notes

Wis. Admin. Code Department of Natural Resources § NR 274.262
Cr. Register, March, 1991, No. 423, eff. 4-1-91.

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