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
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
