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 practicable technology currently available:
Subpart E
Core ------------------------------------------------------------------------
BPT effluent limitations
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/per million
off-lbs) of aluminum drawn
with neat oils
---------------------------Chromium.................................... 0.022 0.0090Cyanide..................................... 0.015 0.0050Zinc........................................ 0.073 0.031Aluminum.................................... 0.32 0.160Oil and grease.............................. 0.97 0.598Suspended solids............................ 2.04 0.972pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart E
Continuous Rod 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 rod cast
---------------------------Chromium.................................... 0.00086 0.00035Cyanide..................................... 0.00057 0.00024Zinc........................................ 0.00287 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 10.0 at all times.
Subpart E
Continuous Rod Casting 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 rod cast
---------------------------Chromium.................................... 0.684 0.28Cyanide..................................... 0.451 0.187Zinc........................................ 2.271 0.949Aluminum.................................... 10.00 4.976Oil and grease.............................. 31.10 18.66Suspended solids............................ 63.76 30.322pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart E
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 E
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........................................ 0.26 0.11Aluminum.................................... 1.150 0.57Oil 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 E
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 E
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................................ 318.00 190.8Suspended 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 11633 and 11635, Mar. 27, 1984]