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 270.034 - New source performance standards (NSPS)

Universal Citation: WI Admin Code ยง NR 270.034

Current through August 26, 2024

Except as provided in ss. NR 270.0015, 270.002 and 270.003, any new source subject to this subcategory shall achieve the following NSPS representing the degree of effluent reduction attainable by the application of the best available demonstrated technology (BADT):

(1) The concentration of pollutants discharged in mine drainage from mines, either open-pit or underground, that produce uranium ore, excluding mines using in-situ leach methods, may not exceed:

Effluent characteristic

[NSPS] 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)

(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable waters from mills using the acid leach, alkaline leach or combined acid and alkaline leach process for the extraction of uranium or from mines and mills using in-situ leach methods.

(b) In the event that the annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility exceeds the annual evaporation, a volume of water equivalent to the difference between annual precipitation falling on the treatment facility and the drainage area contributing surface runoff to the treatment facility and annual evaporation may be discharged subject to the limitations set forth in sub. (1).

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