Section NR 270.044 - New source performance standards (NSPS)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 mercury ores 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 |
Hg | 0.002 | 0.001 |
pH | (1) | (1) |
(2)(a) Except as provided in this subsection, there may not be discharge of process wastewater to navigable waters from mills beneficiating mercury ores by gravity separation methods or by froth-flotation 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 equal 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). Wis. Admin. Code Department of Natural Resources § NR 270.044
Cr. Register, October, 1986, No. 370, eff. 11-1-86.