40 CFR 471.82: Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT):

(a) Rolling spent neat oils—subpart H—BAT. There shall be no discharge of process wastewater pollutants.

(b) Rolling spent emulsions.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc rolled with emulsions

Chromium 0.0005 0.0002

Copper 0.002 0.0009

Cyanide 0.0003 0.0001

Zinc 0.002 0.0006

(c) Rolling contact cooling water.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc rolled with contact cooling water

Chromium 0.020 0.009

Copper 0.069 0.033

Cyanide 0.011 0.004

Zinc 0.055 0.023

(d) Drawing spent emulsions.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc drawn with emulsions

Chromium 0.002 0.0009

Copper 0.008 0.004

Cyanide 0.001 0.0005

Zinc 0.006 0.003

(e) Direct chill casting contact cooling water.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc cast by the direct chill method

Chromium 0.019 0.008

Copper 0.065 0.031

Cyanide 0.010 0.004

Zinc 0.052 0.021

(f) Stationary casting contact cooling water—subpart H—BAT. There shall be no discharge of process wastewater pollutants.

(g) Heat treatment contact cooling water.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc heat treated

Chromium 0.029 0.012

Copper 0.098 0.047

Cyanide 0.016 0.006

Zinc 0.078 0.032

(h) Surface treatment spent baths.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc surface treated

Chromium 0.033 0.014

Copper 0.114 0.054

Cyanide 0.018 0.007

Zinc 0.091 0.038

(i) Surface treatment rinse.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc surface treated

Chromium 0.133 0.054

Copper 0.457 0.219

Cyanide 0.072 0.029

Zinc 0.365 0.151

(j) Alkaline cleaning spent baths.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned

Chromium 0.002 0.0006

Copper 0.005 0.002

Cyanide 0.0007 0.0003

Zinc 0.004 0.002

(k) Alkaline cleaning rinse.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc alkaline cleaned

Chromium 0.626 0.254

Copper 2.17 1.03

Cyanide 0.338 0.135

Zinc 1.73 0.710

(l) Sawing or grinding spent emulsions.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc sawed or ground with emulsions

Chromium 0.009 0.004

Copper 0.031 0.015

Cyanide 0.005 0.002

Zinc 0.025 0.010

(m) Electrocoating rinse.

Subpart H—BAT

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

mg/off-kg (pounds per million off-pounds) of zinc electrocoated

Chromium 0.085 0.035

Copper 0.293 0.140

Cyanide 0.046 0.019

Zinc 0.234 0.096

(n) Degreasing spent solvents—subpart H—BAT. There shall be no discharge or process wastewater pollutants.