Wisconsin Administrative Code
Department of Natural Resources
NR 200-299 - Environmental Protection Wisconsin Pollutant Discharge Elimination System
Chapter NR 270 - Ore mining and dressing
Section NR 270.032 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT)
Current through August 26, 2024
Except as provided in ss. NR 270.0015, 270.002 and 270.003 and 40 CFR 125.30- 125.32, any existing point source subject to this subcategory shall achieve the following effluent limitations representing the degree of effluent reduction attainable after application of the best practicable control technology currently available (BPT):
(1) The concentration of pollutants discharged in mine drainage from mines either open-pit or underground, from which uranium, radium and vanadium ores are produced excluding mines using in-situ leach methods may not exceed:
|
Effluent characteristic |
[BPT] Effluent limitations |
|
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Milligrams per liter |
||
|
TSS |
30.0 |
20.0 |
|
COD |
200.0 |
100.0 |
|
Zn |
1.0 |
0.5 |
|
Ra2261 (dissolved) |
10.0 |
3.0 |
|
Ra2261 (total) |
30.0 |
10.0 |
|
U |
4.0 |
2.0 |
|
pH |
(2) |
(2) |
1 Values in picocuries per liter (pCi/1).
2 Within the range 6.0 to 9.0.
(2) The concentrations of pollutants discharged from mills using the acid leach, alkaline leach or combined acid and alkaline leach process for the extraction of uranium, radium and vanadium including mill-mine facilities and mines using in-situ leach methods may not exceed:
|
Effluent characteristic |
[BPT] Effluent limitations |
|
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Milligrams per liter |
||
|
TSS |
30.0 |
20.0 |
|
COD |
- |
500.0 |
|
As |
1.0 |
0.5 |
|
Zn |
1.0 |
0.5 |
|
Ra2261 (dissolved) |
10.0 |
3.0 |
|
Ra2261 (total) |
30.0 |
10.0 |
|
NH3 |
- |
100.0 |
|
pH |
(2) |
(2) |
