40 CFR 421.223: 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) Leach Tailings.

BAT Limitations for the Secondary Molybdenum and Vanadium Subcategory

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

mg/kg (pounds per million pounds) of technical grade molybdenum plus vanadium plus pure grade molybdenum produced

Arsenic 27.120 12.097

Chromium 7.219 2.927

Lead 5.463 2.536

Nickel 10.731 7.219

Iron 23.413 11.902

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 8078.000 3551.000

(b) Molybdenum filtrate solvent extraction raffinate.

BAT Limitations for the Secondary Molybdenum and Vanadium Subcategory

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

mg/kg (pounds per million pounds) of technical grade molybdenum plus vanadium plus pure grade molybdenum produced

Arsenic 80.952 36.108

Chronium 21.548 8.736

Lead 16.306 7.571

Nickel 32.031 21.548

Iron 69.887 35.526

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 24114.000 10600.000

(c) Vanadium decomposition wet air pollution control.

BAT Limitations for the Secondary Molybdenum and Vanadium Subcategory

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

mg/kg (pounds per million pounds) of vanadium produced by decomposition

Arsenic 0.000 0.000

Chromium 0.000 0.000

Lead 0.000 0.000

Nickel 0.000 0.000

Iron 0.000 0.000

Molybdenum 0.000 0.000

Ammonia (as N) 0.000 0.000

(d) Molybdenum drying wet air pollution control.

BAT Limitations for the Secondary Molybdenum and Vanadium Subcategory

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

mg/kg (pounds per million pounds) of molybdenum produced

Arsenic 0.000 0.000

Chromium 0.000 0.000

Lead 0.000 0.000

Nickel 0.000 0.000

Iron 0.000 0.000

Molybdenum 0.000 0.000

Ammonia (as N) 0.000 0.000

(e) Pure Grade Molybdenum.

BAT Limitations for the Secondary Molybdenum and Vanadium Subcategory

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

mg/kg (pounds per million pounds) of pure molybdenum produced

Arsenic 32.359 14.434

Chromium 8.614 3.492

Lead 6.518 3.026

Nickel 12.804 8.614

Iron 27.936 14.201

Molybdenum [Reserved] [Reserved]

Ammonia (as N) 9638.000 4237.000