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 274.254 - New source performance standards

Current through June 24, 2024
Any new source subject to this subchapter shall achieve the
					 following standards:
Table 25-19
Primary Precious Metals and Mercury Smelter Wet Air
					 Pollution Control
NSPS
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
Oil and grease
13.000
13.000
Total suspended solids
19.500
15.600
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-20
Primary Precious Metals and Mercury Silver Chloride
					 Reduction Spent Solution
NSPS
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
Oil and grease
4.000
4.000
Total suspended solids
6.000
4.800
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-21
Primary Precious Metals and Mercury Electrolytic
					 Cells Wet Air Pollution Control
NSPS
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
Oil and grease
198.000
198.000
Total suspended solids
297.000
237.600
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-22
Primary Precious Metals and Mercury Electrolyte
					 Preparation Wet Air Pollution Control
NSPS
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
Oil and grease
0.500
0.500
Total suspended solids
0.750
0.600
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-23
Primary Precious Metals and Mercury Calciner Wet Air
					 Pollution Control
NSPS
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
Oil and grease
220.000
220.000
Total suspended solids
330.000
264.000
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-24
Primary Precious Metals and Mercury Calcine Quench
					 Water
NSPS
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
Oil and grease
176.000
176.000
Total suspended solids
264.000
211.200
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-25
Primary Precious Metals and Mercury Calciner Stack
					 Gas Contact Cooling Water
NSPS
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
Oil and grease
41.500
41.500
Total suspended solids
62.250
49.800
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-26
Primary Precious Metals and Mercury Condenser
					 Blowdown
NSPS
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
Oil and grease
138.000
138.000
Total suspended solids
207.000
165.600
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.
Table 25-27
Primary Precious Metals and Mercury Mercury Cleaning
					 Bath Water
NSPS
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
Oil and grease
14.000
14.000
Total suspended solids
21.000
16.800
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times.