40 CFR 421.213: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable:

(a) Molybdenum sulfide leachate.

BAT Limitations for the Primary Molybdenum and Rhenium Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds million pounds) of molybdenum sulfide leached

Arsenic 0.644 0.287

Lead 0.130 0.060

Nickel 0.255 0.171

Selenium 0.380 0.171

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 61.720 27.130

Fluoride 16.210 9.214

(b) Roaster SO2 scrubber.

BAT 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 2.334 1.041

Lead 0.470 0.218

Nickel 0.924 0.621

Selenium 1.377 0.621

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 223.800 98.390

Fluoride 58.770 33.410

(c) Molybdic oxide leachate.

BAT 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 16.100 7.182

Lead 3.244 1.506

Nickel 6.371 4.286

Selenium 9.499 4.286

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 1,544.000 678.800

Fluoride 405.400 230.500

(d) Hydrogen reduction furnace scrubber.

BAT 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 3.183 1.420

Lead 0.641 0.298

Nickel 1.260 0.847

Selenium 1.878 0.847

Molybdenum [Reserved] [Reserved].

Ammonia (as N) 305.300 134.200

Fluoride 80.150 45.570

(e) Depleted rhenium scrubbing solution.

BAT 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 0.995 0.444

Lead 0.201 0.093

Nickel 0.394 0.265

Selenium 0.587 0.265

Molybdenum [Reserved] [Reserved].

Ammonia (as N) 95.440 41.960

Fluoride 25.060 14.250