40 CFR 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