40 CFR 421.233: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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) Raw material dust control.

BAT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of copper, nickel, and cobalt in the crushed raw material

Copper 0.099 0.047

Nickel 0.042 0.028

Ammonia (as N) 10.260 4.512

Cobalt 0.011 0.005

(b) Nickel wash water.

BAT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of nickel powder washed

Copper 0.043 0.021

Nickel 0.019 0.013

Ammonia (as N) 4.515 1.985

Cobalt 0.005 0.002

(c) Nickel reduction decant.

BAT Limitations for the Primary Nickel and Cobalt Subcategory

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average

mg/kg (pounds per million pounds) of nickel produced

Copper 16.250 7.744

Nickel 6.982 4.697

Ammonia (as N) 1,692.000 743.900

Cobalt 1.777 0.889

(d) Cobalt reduction decant.

BAT Limitations for the Primary Nickel 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 27.390 13.050

Nickel 11.770 7.917

Ammonia (as N) 2,852.000 1,254.000

Cobalt 2.996 1.498