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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter N - Effluent Guidelines and Standards |
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Part 421 - Nonferrous Metals Manufacturing Point Source Category |
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Subpart AC - Secondary Tungsten and Cobalt Subcategory |
§ 421.315 - Pretreatment standards for existing sources.
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§ 421.315 Pretreatment standards for existing sources.
Except as provided in 40 CFR 403.7, any existing source subject to this subpart which introduces polutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in secondary tungsten and cobalt process wastewater introduced into a POTW shall not exceed the following values:
(a) Tungsten detergent wash and rinse.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten scrap washed Copper 0.250 0.119 Nickel 0.107 0.072 Ammonia (as N) 25.990 11.430 Cobalt 0.538 0.236 Tungsten 0.679 0.302 (b) Tungsten leaching acid.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten produced Copper 3.291 1.569 Nickel 1.414 0.951 Ammonia (as N) 342.700 150.700 Cobalt 7.096 3.111 Tungsten 8.947 3.985 (c) Tungsten post-leaching wash and rinse.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten produced Copper 6.583 3.137 Nickel 2.829 1.903 Ammonia (as N) 685.600 301.400 Cobalt 14.194 6.223 Tungsten 17.900 7.972 (d) Synthetic scheelite filtrate.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of synthetic scheelite produced Copper 21.330 10.170 Nickel 9.164 6.165 Ammonia (as N) 2,221.000 976.300 Cobalt 45.984 20.160 Tungsten 57.980 25.820 (e) Tungsten carbide leaching wet air pollution control.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten carbide scrap Copper 2.241 1.068 Nickel 0.963 0.648 Ammonia (as N) 233.400 102.600 Cobalt 4.833 2.119 Tungsten 6.093 2.714 (f) Tungsten carbide wash water.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of tungsten carbide produced Copper 10.670 5.083 Nickel 4.583 3.083 Ammonia (as N) 1,111.000 488.300 Cobalt 22.999 10.083 Tungsten 29.000 12.920 (g) Cobalt sludge leaching wet air pollution control.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced from cobalt sludge Copper 45.800 21.830 Nickel 19.680 13.240 Ammonia (as N) 4,770.000 2,097.000 Cobalt 98.756 43.295 Tungsten 124.500 55.460 (h) Crystallization decant.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 53.310 25.410 Nickel 22.910 15.410 Ammonia (as N) 5,552.000 2,441.000 Cobalt 114.954 50.397 Tungsten 144.9 64.56 (i) Acid wash decant.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 24.400 11.630 Nickel 10.490 7.053 Ammonia (as N) 2,541.000 1,117.000 Cobalt 52.611 23.065 Tungsten 66.34 29.55 (j) Cobalt hydroxide filtrate.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 72.510 34.560 Nickel 31.160 20.960 Ammonia (as N) 7,551.000 3,320.000 Cobalt 156.346 68.543 Tungsten 197.1 87.8 (k) Cobalt hydroxide filter cake wash.
PSES for the Secondary Tungsten and Cobalt Subcategory
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average mg/kg (pounds per million pounds) of cobalt produced Copper 139.600 66.510 Nickel 59.970 40.340 Ammonia (as N) 14,530.000 6,389.000 Cobalt 300.094 131.932 Tungsten 379.400 169.000 [50 FR 38386, Sept. 20, 1985, as amended at 55 FR 31717, 31718, Aug. 3, 1990]