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 [48 FR 49149, Oct. 24, 1983; 49 FR 11633, 11635, Mar. 27, 1984]