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 270.113 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT)
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 by the application of the best available technology economically achievable (BAT):
(1) The concentration of pollutants discharged in mine drainage from mines that produce platinum bearing ores from open-pit or underground operations other than placer deposits may not exceed:
|
Effluent characteristic |
[BAT] Effluent limitations |
|
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Milligrams per liter |
||
|
Cu |
0.3 |
0.15 |
|
Zn |
1.5 |
0.75 |
|
Pb |
0.8 |
0.3 |
|
Hg |
0.002 |
0.06 |
|
Cd |
0.1 |
0.06 |
(2) The concentration of pollutants discharged from mills that use the froth-flotation process alone, or in conjunction with other processes, for the beneficiation of platinum ores may not exceed:
|
Effluent characteristic |
[BAT] Effluent limitations |
|
|
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
|
Milligrams per liter |
||
|
Cu |
0.3 |
0.15 |
|
Zn |
1.5 |
0.75 |
|
Pb |
0.8 |
0.3 |
|
Hg |
0.002 |
0.06 |
|
Cd |
0.1 |
0.06 |
