Wis. Admin. Code NR § 273.042

Current through May 28, 2024
Section NR 273.042 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available

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 4-1

Precious Metals

Rolling Spent Emulsions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals rolled with emulsions

Cadmium

0.026

0.012

Copper

0.147

0.077

Cyanide

0.023

0.010

Silver

0.032

0.013

Oil and grease

1.54

0.925

Total suspended solids

3.16

1.51

pH

(1)

(1)

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

Table 4-2

Precious Metals

Drawing Spent Emulsions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals drawn with emulsions

Cadmium

0.016

0.007

Copper

0.091

0.048

Cyanide

0.014

0.006

Silver

0.020

0.008

Oil and grease

0.950

0.570

Total suspended solids

1.95

0.926

pH

(1)

(1)

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

Table 4-3

Precious Metals

Drawing Spent Soap Solutions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals drawn with soap solutions

Cadmium

0.001

0.0005

Copper

0.006

0.003

Cyanide

0.0009

0.0004

Silver

0.001

0.0006

Oil and grease

0.063

0.038

Total suspended solids

0.128

0.061

pH

(1)

(1)

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

Table 4-4

Precious Metals

Metal Powder Production

Wet Atomization Wastewater

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals powder wet atomized

Cadmium

2.27

1.00

Copper

12.7

6.70

Cyanide

1.94

0.802

Silver

2.70

1.14

Oil and grease

134

80.2

Total suspended solids

274

130

pH

(1)

(1)

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

Table 4-5

Precious Metals

Heat Treatment Contact Cooling Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of extruded precious metals heat treated

Cadmium

1.42

0.626

Copper

7.93

4.17

Cyanide

1.21

0.501

Silver

1.71

0.709

Oil and grease

83.4

50.1

Total suspended solids

171

81.3

pH

(1)

(1)

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

Table 4-6

Precious Metals

Semi-Continuous or Continuous Contact Cooling Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals cast by the semi-continuous or continuous method

Cadmium

3.50

1.55

Copper

19.6

10.3

Cyanide

2.99

1.24

Silver

4.23

1.75

Oil and grease

206

124

Total suspended solids

423

209

pH

(1)

(1)

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

Table 4-7

Precious Metals

Direct Chill Casting Contact Cooling Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals cast by the direct chill method

Cadmium

3.67

1.62

Copper

20.5

10.8

Cyanide

3.13

1.30x

Silver

4.43

1.84x

Oil and grease

216

130

Total suspended solids

443

211

pH

(1)

(1)

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

Table 4-8

Precious Metals

Shot Casting Contact Cooling Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals shot cast

Cadmium

1.25

0.551

Copper

6.98

3.67

Cyanide

1.07

0.441

Silver

1.51

0.624

Oil and grease

73.4

44.1

Total suspended solids

151

71.6

pH

(1)

(1)

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

Table 4-9

Precious Metals

Pressure Bonding Contact Cooling Water

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metal base metal pressure bonded

Cadmium

0.029

0.013

Copper

0.159

0.084

Cyanide

0.024

0.010

Silver

0.034

0.014

Oil and grease

1.67

1.00

Total suspended solids

3.43

1.63

pH

(1)

(1)

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

Table 4-10

Precious Metals

Surface Treatment Spent Baths

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals surface treated

Cadmium

0.033

0.015

Copper

0.183

0.097

Cyanide

0.028

0.012

Silver

0.040

0.017

Oil and grease

1.93

1.16

Total suspended solids

3.95

1.88

pH

(1)

(1)

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

Table 4-11

Precious Metals

Surface Treatment Rinse

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals surface treated

Cadmium

2.10

0.924

Copper

11.7

5.16

Cyanide

1.79

0.739

Silver

2.53

1.05

Oil and grease

123

73.9

Total suspended solids

253

120

pH

(1)

(1)

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

Table 4-12

Precious Metals

Alkaline Cleaning Spent Baths

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned

Cadmium

0.021

0.009

Copper

0.114

0.060

Cyanide

0.018

0.007

Silver

0.025

0.010

Oil and grease

1.20

0.720

Total suspended solids

2.46

1.170

pH

(1)

(1)

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

Table 4-13

Precious Metals

Alkaline Cleaning Rinse

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals alkaline cleaned

Cadmium

3.81

1.68

Copper

21.3

11.2

Cyanide

3.25

1.35

Silver

4.59

1.91

Oil and grease

224

135

Total suspended solids

459

219

pH

(1)

(1)

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

Table 4-14

Precious Metals

Alkaline Cleaning Prebonding Wastewater

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals and base metal cleaned prior to bonding

Cadmium

3.95

1.74

Copper

22.1

11.6

Cyanide

3.37

1.39

Silver

4.76

1.97

Oil and grease

232

139

Total suspended solids

476

226

pH

(1)

(1)

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

Table 4-15

Precious Metals

Tumbling or Burnishing Wastewater

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals tumbled or burnished

Cadmium

4.12

1.82

Copper

23.0

12.1

Cyanide

3.51

1.45

Silver

4.96

2.06

Oil and grease

242

145

Total suspended solids

496

236

pH

(1)

(1)

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

Table 4-16

Precious Metals

Sawing or Grinding Spent Emulsions

BPT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/off-kg (pounds per million off-pounds) of precious metals sawed or ground with emulsions

Cadmium

0.032

0.014

Copper

0.178

0.094

Cyanide

0.027

0.011

Silver

0.039

0.016

Oil and grease

1.87

1.12

Total suspended solids

3.83

1.82

pH

(1)

(1)

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

Wis. Admin. Code Department of Natural Resources § NR 273.042

Cr. Register, September, 1990, No. 417, eff. 10-1-90.