GroundRules
40 CFR 421.224: Standards of performance for new sources.
Where this section sits in the code
- Title 40—Protection of Environment
- CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
- SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
- PART 421—NONFERROUS METALS MANUFACTURING POINT SOURCE CATEGORY
- Subpart T—Secondary Molybdenum and Vanadium Subcategory
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
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
Total Suspended Solids 292.665 234.132
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
Arsenic 80.952 36.108
Chromium 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
Total Suspended Solids 873.585 698.868
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
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
Total suspended solids 0.000 0.000
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
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
Total suspended solids 0.000 0.000
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
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
Total Suspended Solids 349.200 279.360
pH (1) (1)
1 Within the range of 7.5 to 10.0 at all times.
Collected 2026-08-27T02:26:04Z. Source file · JSON