Wis. Admin. Code Department of Natural Resources § NR 274.253 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

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 BAT:

Table 25-10

Primary Precious Metals and Mercury Smelter Wet Air Pollution Control

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold and silver smelted

Lead

0.364

0.169

Mercury

0.195

0.078

Silver

0.377

0.156

Zinc

1.326

0.546

Gold

0.130

Table 25-11

Primary Precious Metals and Mercury Silver Chloride Reduction Spent Solution

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of silver reduced in solution

Lead

0.112

0.052

Mercury

0.060

0.024

Silver

0.116

0.048

Zinc

0.408

0.168

Gold

0.040

Table 25-12

Primary Precious Metals and Mercury Electrolytic Cells Wet Air Pollution Control

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of gold refined electrolytically

Lead

5.544

2.574

Mercury

2.970

1.188

Silver

5.742

2.376

Zinc

20.200

8.316

Gold

1.980

Table 25-13

Primary Precious Metals and Mercury Electrolyte Preparation Wet Air Pollution Control

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/troy ounce of silver in the produced electrolyte

Lead

0.014

0.007

Mercury

0.008

0.003

Silver

0.015

0.006

Zinc

0.051

0.021

Gold

0.005

Table 25-14

Primary Precious Metals and Mercury Calciner Wet Air Pollution Control

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of mercury condensed

Lead

6.160

2.860

Mercury

3.300

1.320

Silver

6.380

2.640

Zinc

22.440

9.240

Gold

2.200

Table 25-15

Primary Precious Metals and Mercury Calcine Quench Water

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of mercury condensed

Lead

4.928

2.288

Mercury

2.640

1.056

Silver

5.104

2.112

Zinc

17.950

7.392

Gold

1.760

Table 25-16

Primary Precious Metals and Mercury Calciner Stack Gas Contact Cooling Water

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of mercury condensed

Lead

1.162

0.540

Mercury

0.623

0.249

Silver

1.204

0.498

Zinc

4.233

1.743

Gold

0.415

Table 25-17

Primary Precious Metals and Mercury Condenser Blowdown

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of mercury condensed

Lead

3.864

1.794

Mercury

2.070

0.828

Silver

4.002

1.656

Zinc

14.080

5.796

Gold

1.380

Table 25-18

Primary Precious Metals and Mercury Mercury Cleaning Bath Water

BAT Effluent Limitations

Maximum for any 1 day

Maximum for monthly average

Pollutant or pollutant property

mg/kg (pounds per million pounds) of mercury condensed

Lead

0.392

0.182

Mercury

0.210

0.084

Silver

0.406

0.168

Zinc

1.428

0.588

Gold

0.140

Notes

Wis. Admin. Code Department of Natural Resources § NR 274.253
Cr. Register, March, 1991, No. 423, eff. 4-1-91.

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