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

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitation representing the degree of effluent reduction attainable by the application of the best practicable technology currently available: (a) Molybdenum sulfide leachate. BPT Limitations for the Primary Molybdenum Rhenium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum monthly average mg/kg (pounds per million pounds) of molybdenum sulfide leached Arsenic 0.968 0.431 Lead 0.195 0.093 Nickle 0.889 0.588 Selenium 0.570 0.255 Molybdenum [Reserved] [Reserved]. Ammonia (as N) 61.720 27.130 Fluoride 16.210 9.214 Total suspended solids 18.980 9.029 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (b) Roaster SO 2 scrubber. BPT Limitations for the Primary Molybdenum and Rhenium Subcategory Pollutant of pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of molybdenum sulfide roasted Arsenic 3.509 1.561 Lead 0.705 0.336 Nickel 3.224 2.133 Selenium 2.065 0.924 Molybdenum [Reserved] [Reserved]. Ammonia (as N) 223.800 98.390 Fluoride 58.770 33.410 Total suspended solids 68.840 32.740 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (c) Molybdic oxide leachate. BPT Limitations for the Primary Molybdenum and Rhenium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of molybdenum contained in molybdic oxide leached Arsenic 24.210 10.770 Lead 4.865 2.317 Nickel 22.240 14.710 Selenium 14.250 6.371 Molybdenum [Reserved] [Reserved] Ammonia (as N) 1,544.000 678.800 Fluoride 405.400 230.500 Total suspended solids 474.900 225.900 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (d) Hydrogen reduction furnace scrubber. BPT Limitations for the Primary Molybdenum and Rhenium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of molybdenum metal powder produced Arsenic 47.860 21.300 Lead 9.617 4.580 Nickel 43.970 29.080 Selenium 28.170 12.600 Molybdenum [Reserved] [Reserved] Ammonia (as N) 3,052.000 1,342.000 Fluoride 801.400 455.700 Total suspended solids 938.800 446.500 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. (e) Depleted rhenium scrubbing solution. BPT Limitations for the Primary Molybdenum and Rhenium Subcategory Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of molybdenum sulfide roasted Arsenic 1.497 0.666 Lead 0.301 0.143 Nickel 1.375 0.909 Selenium 0.881 0.394 Molybdenum [Reserved] [Reserved] Ammonia (as N) 95.440 41.960 Fluoride 25.060 14.250 Total suspended solids 29.360 13.960 pH ( 1 ) ( 1 ) 1 Within the range of 7.5 to 10.0 at all times. [50 FR 38355, Sept. 20, 1985, as amended at 55 FR 31701, Aug. 3, 1990]