40 C.F.R. § 421.224

Current through May 31, 2024
Section 421.224 - Standards of performance for new sources

Any new source subject to this subpart shall achieve the following new source performance standards:

(a) Leach tailings.

NSPS 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
Arsenic27.12012.097
Chromium7.2192.927
Lead5.4632.536
Nickel10.7317.219
Iron23.41311.902
Molybdenum[Reserved][Reserved]
Ammonia (as N)8078.0003551.000
Total Suspended Solids292.665234.132
pH(1)(1)

1 Within the range of 7.5 to 10.0 at all times.

(b) Molybdenum filtrate solvent extraction raffinate.

NSPS 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
Arsenic80.95236.108
Chromium21.5488.736
Lead16.3067.571
Nickel32.03121.548
Iron69.88735.526
Molybdenum[Reserved][Reserved]
Ammonia (as N)24114.00010600.000
Total Suspended Solids873.585698.868
pH(1)(1)

1 Within the range of 7.5 to 10.0 at all times.

(c) Vanadium decomposition wet air pollution control.

NSPS 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 and vanadium produced
Arsenic0.0000.000
Chromium0.0000.000
Lead0.0000.000
Nickel0.0000.000
Iron0.0000.000
Molybdenum0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH(1)(1)

1 Within the range of 7.5 to 10.0 at all times.

(d) Molybdenum drying wet air pollution control.

NSPS 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 and vanadium produced
Arsenic0.0000.000
Chromium0.0000.000
Lead0.0000.000
Nickel0.0000.000
Iron0.0000.000
Molybdenum0.0000.000
Ammonia (as N)0.0000.000
Total suspended solids0.0000.000
pH(1)(1)

1 Within the range of 7.5 to 10.0 at all times.

(e) Pure Grade Molybdenum.

NSPS 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
Arsenic32.35914.434
Chromium8.6143.492
Lead6.5183.026
Nickel12.8048.614
Iron27.93614.201
Molybdenum[Reserved][Reserved]
Ammonia (as N)9638.0004237.000
Total Suspended Solids349.200279.360
pH(1)(1)

1 Within the range of 7.5 to 10.0 at all times.

40 C.F.R. §421.224

50 FR 38357, Sept. 20, 1985, as amended at 55 FR 31704, Aug. 3, 1990