Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in subpart L of this part and 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable after application of the best practicable control technology currently available (BPT): (a) 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 shall not exceed: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Milligrams per liter TSS 30 20 COD 200 100 Zn 1.0 0.5 Ra226 1 (dissolved) 10 3 Ra226 1 (total) 30 10 U 4 2 pH ( 2 ) ( 2 ) 1 Values in picocuries per liter (pCi/l). 2 Within the range 6.0 to 9.0. (b) 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 shall not exceed: Effluent characteristic Effluent limitations Maximum for any 1 day Average of daily values for 30 consecutive days Milligrams per liter TSS 30 20 COD 500 As 1.0 .5 Zn 1.00 .5 Ra226 1 (dissolved) 10 3 Ra226 1 (total) 30 10 NH 3 100 pH ( 2 ) ( 2 ) 1 Values in picocuries per liter (pCi/l). 2 Within the range 6.0 to 9.0.