40 CFR 467.13: Effluent limitations 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 must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable. The mass of pollutants in the core and ancillary operations' process wastewater shall not exceed the following values:

Subpart A

Core With an Annealing Furnace Scrubber

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium 0.036 0.015

Cyanide 0.024 0.0098

Zinc 0.119 0.050

Aluminum 0.525 0.257

Subpart A

Core Without an Annealing Furnace Scrubber

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium 0.025 0.010

Cyanide 0.016 0.0067

Zinc 0.081 0.034

Aluminum 0.356 0.174

Subpart A

Continuous Sheet Casting Spent Lubricant

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum sheet cast

Chromium 0.00086 0.00035

Cyanide 0.00057 0.00024

Zinc 0.00287 0.0012

Aluminum 0.0127 0.0062

Subpart A

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum quenched

Chromium 0.897 0.367

Cyanide 0.591 0.245

Zinc 2.974 1.243

Aluminum 13.10 6.518

Subpart A

Cleaning or Etching Bath

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.079 0.032

Cyanide 0.052 0.022

Zinc 0.262 0.109

Aluminum 1.151 0.573

Subpart A

Cleaning or Etching Rinse

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.612 0.251

Cyanide 0.404 0.167

Zinc 2.031 0.849

Aluminum 8.944 4.45

Subpart A

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property BAT effluent limitations

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.851 0.348

Cyanide 0.561 0.232

Zinc 2.822 1.179

Aluminum 12.43 6.186