Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 274 - Nonferrous metals manufacturing › Subchapter XXV - Primary Precious Metals and Mercury › Section NR 274.253 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable

Current through June 24, 2024
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