Wisconsin Administrative Code › Department of Natural Resources › NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System › Chapter NR 273 - Nonferrous metals forming and metal powders › Subchapter IV - Precious Metals › Section NR 273.044 - New source performance standards

Current through June 24, 2024
Any new source subject to this subchapter shall achieve the
					 following standards:
Table 4-33
Precious Metals
Rolling Spent Emulsions
NSPS
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 4-34
Precious Metals
Drawing Spent Emulsions
NSPS
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
0.017
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
0.927
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-35
Precious Metals
Drawing Spent Soap Solutions
NSPS
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
0.002
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 4-36
Precious Metals
Metal Powder Production
Wet Atomization Wastewater
NSPS
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
6.68
Cyanide
1.94
0.802
Silver
2.74
1.14
Oil and grease
134
80.2
Total suspended solids
274
131
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-37
Precious Metals
Heat Treatment Contact Cooling Water
NSPS
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
0.142
0.063
Copper
0.793
0.417
Cyanide
0.121
0.050
Silver
0.171
0.071
Oil and grease
8.34
5.01
Total suspended solids
17.1
8.13
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-38
Precious Metals
Semi-Continuous or Continuous Contact Cooling Water
NSPS
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
0.350
0.155
Copper
1.96
1.03
Cyanide
0.299
0.124
Silver
0.423
0.175
Oil and grease
20.6
12.4
Total suspended solids
42.3
20.1
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-39
Precious Metals
Direct Chill Casting Contact Cooling Water
NSPS
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
0.367
0.162
Copper
2.05
1.08
Cyanide
0.313
0.130
Silver
0.443
0.184
Oil and grease
21.6
13.0
Total suspended solids
44.3
21.1
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-40
Precious Metals
Shot Casting Contact Cooling Water
NSPS
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
0.125
0.055
Copper
0.698
0.367
Cyanide
0.107
0.044
Silver
0.151
0.063
Oil and grease
7.34
4.41
Total suspended solids
15.1
7.16
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-41
Precious Metals
Pressure Bonding Contact Cooling Water
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (pounds per million off-pounds) of
								  precious metals 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 4-42
Precious Metals
Surface Treatment Spent Baths
NSPS
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 4-43
Precious Metals
Surface Treatment Rinse
NSPS
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
0.210
0.093
Copper
1.17
0.616
Cyanide
0.179
0.074
Silver
0.253
0.105
Oil and grease
12.3
7.39
Total suspended solids
25.3
12.0
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-44
Precious Metals
Alkaline Cleaning Spent Baths
NSPS
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
1.17
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-45
Precious Metals
Alkaline Cleaning Rinse
NSPS
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
0.381
0.168
Copper
2.13
1.112
Cyanide
0.325
0.135
Silver
0.459
0.191
Oil and grease
22.4
13.5
Total suspended solids
45.9
21.9
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-46
Precious Metals
Alkaline Cleaning Prebonding Wastewater
NSPS
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
0.400
0.174
Copper
2.21
1.16
Cyanide
0.337
0.139
Silver
0.476
0.197
Oil and grease
23.2
13.9
Total suspended solids
47.6
22.6
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-47
Precious Metals
Tumbling or Burnishing Wastewater
NSPS
Maximum for any 1 day
Maximum for monthly average
Pollutant or pollutant property
mg/off-kg (poun pounds) of preci or
								  burnished
ds per million off-ous metals tumbled
Cadmium
0.412
0.182
Copper
2.300
1.21
Cyanide
0.351
0.145
Silver
0.496
0.206
Oil and grease
24.2
14.5
Total suspended solids
49.6
23.6
pH
(1)
(1)
(1) Within the range of 7.5 to 10.0 at all times
Table 4-48
Precious Metals
Sawing or Grinding Spent Emulsions
NSPS
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
0.038
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