Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XXIII - Primary Nickel and Cobalt
Section NR 274.232 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
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 BPT:
Table 23-1
Primary Nickel and Cobalt Raw Material Dust Control
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of copper, nickel, and cobalt in crushed raw material |
|
|
Copper |
0.146 |
0.077 |
|
Nickel |
0.148 |
0.098 |
|
Ammonia (as N) |
10.260 |
4.512 |
|
Cobalt |
0.016 |
0.007 |
|
Total suspended solids |
3.157 |
1.502 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 23-2
Primary Nickel and Cobalt Nickel Wash Water
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of nickel powder washed |
|
|
Copper |
0.064 |
0.034 |
|
Nickel |
0.065 |
0.043 |
|
Ammonia (as N) |
4.515 |
1.985 |
|
Cobalt |
0.007 |
0.003 |
|
Total suspended solids |
1.389 |
0.660 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 23-3
Primary Nickel and Cobalt Nickel Reduction Decant
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of nickel produced |
|
|
Copper |
24.120 |
12.700 |
|
Nickel |
24.370 |
16.120 |
|
Ammonia (as N) |
1,692.000 |
743.900 |
|
Cobalt |
2.666 |
1.143 |
|
Total suspended solids |
520.500 |
247.600 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 23-4
Primary Nickel and Cobalt Cobalt Reduction Decant
|
BPT Effluent Limitations |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of cobalt produced |
|
|
Copper |
40.660 |
21.400 |
|
Nickel |
41.080 |
27.180 |
|
Ammonia (as N) |
2,852.000 |
1,254.000 |
|
Cobalt |
4.494 |
1.926 |
|
Total suspended solids |
877.300 |
417.300 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
