eLaws | eCases | United States Code | Federal Courts |
 Code of Federal Regulations (Last Updated: July 5, 2024)
 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

  § 421.224 - Standards of performance for new sources.  

Latest version.

  • § 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
    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.

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