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 [48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984]