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 ------------------------------------------------------------------------
BAT effluent limitations
--------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum drawn
with neat oils
--------------------------Chromium..................................... 0.022 0.009Cyanide...................................... 0.015 0.006Zinc......................................... 0.073 0.031Aluminum..................................... 0.321 0.16------------------------------------------------------------------------
Subpart E
Continuous Rod Casting Spent Lubricant ------------------------------------------------------------------------
BAT effluent limitations
--------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum rod cast
--------------------------Chromium..................................... 0.00086 0.0004Cyanide...................................... 0.0006 0.0002Zinc......................................... 0.0029 0.0012Aluminum..................................... 0.0127 0.0063------------------------------------------------------------------------
Subpart E
Continuous Rod Casting Contact Cooling Water ------------------------------------------------------------------------
BAT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum rod cast
---------------------------Chromium.................................... 0.086 0.035Cyanide..................................... 0.056 0.024Zinc........................................ 0.283 0.118Aluminum.................................... 1.247 0.621------------------------------------------------------------------------
Subpart E
Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
BAT effluent limitations
--------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum quenched
--------------------------Chromium..................................... 0.896 0.367Cyanide...................................... 0.591 0.245Zinc......................................... 2.974 1.243Aluminum..................................... 13.10 6.519------------------------------------------------------------------------
Subpart E
Cleaning or Etching Bath ------------------------------------------------------------------------
BAT effluent limitations
-------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million
off-lbs) of aluminum
cleaned or etched
-------------------------Chromium...................................... 0.079 0.032Cyanide....................................... 0.052 0.022Zinc.......................................... 0.262 0.109Aluminum...................................... 1.151 0.563------------------------------------------------------------------------
Subpart E
Cleaning or Etching Rinse ------------------------------------------------------------------------
BAT effluent limitations
-------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million
off-lbs) of aluminum
cleaned or etched
-------------------------Chromium...................................... 0.612 0.251Cyanide....................................... 0.404 0.167Zinc.......................................... 2.031 0.849Aluminum...................................... 8.944 4.451------------------------------------------------------------------------
Subpart E
Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------
BAT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum cleaned
or etched
---------------------------Chromium.................................... 0.851 0.348Cyanide..................................... 0.561 0.232Zinc........................................ 2.82 1.179Aluminum.................................... 12.43 6.19------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11633 and 11635, Mar. 27, 1984]