40 CFR 467.53: 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 discharge of wastewater pollutants from the core and ancillary operations shall not exceed the values set forth below:

Subpart E

Core

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 drawn with neat oils

Chromium 0.022 0.009

Cyanide 0.015 0.006

Zinc 0.073 0.031

Aluminum 0.321 0.16

Subpart E

Continuous Rod 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 rod cast

Chromium 0.00086 0.0004

Cyanide 0.0006 0.0002

Zinc 0.0029 0.0012

Aluminum 0.0127 0.0063

Subpart E

Continuous Rod Casting 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 rod cast

Chromium 0.086 0.035

Cyanide 0.056 0.024

Zinc 0.283 0.118

Aluminum 1.247 0.621

Subpart E

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 0.896 0.367

Cyanide 0.591 0.245

Zinc 2.974 1.243

Aluminum 13.10 6.519

Subpart E

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 0.563

Subpart E

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 4.451

Subpart E

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 2.82 1.179

Aluminum 12.43 6.19