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 for the core operation and for the ancillary operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:
Subpart A
Core With an Annealing Furnace Scrubber ------------------------------------------------------------------------
BPT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum rolled
with neat oils
---------------------------Chromium.................................... 0.0360 0.0147Cyanide..................................... 0.0237 0.0098Zinc........................................ 0.119 0.0498Aluminum.................................... 0.525 0.257Oil and grease.............................. 1.634 0.980Suspended solids............................ 3.348 1.593pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Core Without an Annealing Furnace Scrubber ------------------------------------------------------------------------
BPT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum rolled
with neat oils
---------------------------Chromium.................................... 0.0244 0.010Cyanide..................................... 0.0161 0.0067Zinc........................................ 0.0808 0.0338Aluminum.................................... 0.356 0.174Oil and grease.............................. 1.11 0.664Suspended solids............................ 2.27 1.079pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Continuous Sheet Casting Spent Lubricant ------------------------------------------------------------------------
BPT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum sheet
cast by continuous methods
---------------------------Chromium.................................... 0.00086 0.00035Cyanide..................................... 0.00057 0.00024Zinc........................................ 0.0029 0.0012Aluminum.................................... 0.0127 0.0063Oil and grease.............................. 0.0393 0.0236Suspended solids............................ 0.0805 0.0383pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
BPT 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.................................... 3.39 1.39Cyanide..................................... 2.24 0.93Zinc........................................ 11.25 4.70Aluminum.................................... 49.55 24.66Oil and grease.............................. 154.10 92.46Suspended solids............................ 315.91 150.25pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Cleaning or Etching Bath ------------------------------------------------------------------------
BPT 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 0.110Aluminum.................................... 1.15 0.573Oil and grease.............................. 3.58 2.15Suspended solids............................ 7.34 3.49pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Cleaning or Etching Rinse ------------------------------------------------------------------------
BPT 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.................................... 6.12 2.51Cyanide..................................... 4.04 1.67Zinc........................................ 20.31 8.49Aluminum.................................... 89.46 44.52Oil and grease.............................. 278.24 166.95Suspended solids............................ 570.39 271.29pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart A
Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------
BPT 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.................................... 7.00 2.86Cyanide..................................... 4.61 1.91Zinc........................................ 23.22 9.70Aluminum.................................... 102.24 50.88Oil and grease.............................. 318.00 190.80Suspended solids............................ 651.90 310.05pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times. [48 FR 49149, Oct. 24, 1983; 49 FR 11631 and 11632, Mar. 27, 1984]