Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 274 - Nonferrous metals manufacturing
Subchapter XXIV - Secondary Nickel
Section NR 274.244 - New source performance standards
Any new source subject to this subchapter shall achieve the following standards:
Table 24-1
Secondary Nickel Slag Reclaim Tailings
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of slag input into the reclaim process |
|
|
Chromium |
5.653 |
2.313 |
|
Copper |
24.410 |
12.850 |
|
Nickel |
24.670 |
16.320 |
|
Total suspended solids |
526.800 |
250.500 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 24-2
Secondary Nickel Acid Reclaim Leaching Filtrate
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of acid reclaim nickel produced |
|
|
Chromium |
2.198 |
0.899 |
|
Copper |
9.491 |
4.995 |
|
Nickel |
9.590 |
6.344 |
|
Total suspended solids |
204.800 |
97.400 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
Table 24-3
Secondary Nickel Acid Reclaim Leaching Belt Filter Backwash
|
NSPS |
||
|
Maximum for any 1 day |
Maximum for monthly average |
|
|
Pollutant or pollutant property |
mg/kg (pounds per million pounds) of nickel produced |
|
|
Chromium |
0.528 |
0.216 |
|
Copper |
2.278 |
1.199 |
|
Nickel |
2.302 |
1.523 |
|
Total suspended solids |
49.160 |
23.380 |
|
pH |
(1) |
(1) |
(1) Within the range of 7.5 to 10.0 at all times.
