40 CFR 421.236: Pretreatment standards for new sources.

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with a 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of wastewater pollutants in primary nickel and cobalt process wastewater introduced into a POTW shall not exceed the following values:

(a) Raw material dust control.

PSNS 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.

PSNS 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.

PSNS 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) 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.

PSNS 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