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 270.062 - 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 by the application of the best practicable control technology currently available (BPT):
(1) The concentration of pollutants in mine drainage from mines producing 5000 metric tons (5512 short tons) or more of tungsten bearing ores per year 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 |
|
Cd |
0.1 |
0.05 |
|
Cu |
0.3 |
0.15 |
|
Zn |
1.0 |
0.5 |
|
Pb |
0.6 |
0.3 |
|
As |
1.0 |
0.5 |
|
pH |
(1) |
(1) |
(2) The concentration of pollutants discharged in mine drainage from mines producing less than 5000 metric tons (5512 short tons) or discharged from mills processing less than 5000 metric tons (5512 short tons) of tungsten ores per year by methods other than ore leaching may not exceed:
|
[BPT] Effluent limitations |
||
|
Effluent characteristic |
Maximum for any 1 day |
Average of daily values for 30 consecutive days |
|
Milligrams per liter |
||
|
TSS |
50.0 |
30.0 |
|
pH |
(1) |
(1) |
(3) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of tungsten ores per year by purely physical methods including ore crushing, washing, jigging, heavy media separation, and magnetic and electrostatic separation 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 |
|
Cd |
0.1 |
0.05 |
|
Cu |
0.3 |
0.15 |
|
Zn |
1.0 |
0.5 |
|
As |
1.0 |
0.5 |
|
pH |
(1) |
(1) |
(4) The concentration of pollutants discharged from mills processing 5000 metric tons (5512 short tons) or more of tungsten ores per year by froth flotation 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 |
|
Cd |
0.1 |
0.05 |
|
Cu |
0.3 |
0.15 |
|
Zn |
1.0 |
0.5 |
|
As |
1.0 |
0.5 |
|
pH |
(1) |
(1) |
1 Within the range 6.0 to 9.0
