40 CFR § 421.313
Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
June 9, 2020
CFR

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) Tungsten detergent wash and rinse.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
mg/kg (pounds per million pounds) of tungsten carbide scrap leached
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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 45.80 21.83
Nickel 19.68 13.24
Ammonia (as N) 4,770.00 2,097.00
Cobalt 98.756 43.295
Tungsten 124.50 55.46

(h) Crystallization decant.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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 144.900 64.560

(i) Acid wash decant.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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 66.340 29.550

(j) Cobalt hydroxide filtrate.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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 197.100 87.800

(k) Cobalt hydroxide filter cake wash.

BAT Limitations for the Secondary Tungsten and Cobalt Subcategory

Open Table
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 31714, 31715, Aug. 3, 1990]


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