Any new source subject to this subpart must achieve the following performance standards. The discharge of wastewater pollutants from the core shall not exceed the values set forth below:
Subpart D
Core ------------------------------------------------------------------------
NSPS
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum forged
---------------------------Chromium.................................... 0.019 0.008Cyanide..................................... 0.010 0.004Zinc........................................ 0.051 0.021Aluminum.................................... 0.305 0.135Oil and grease.............................. 0.50 0.50Suspended solids............................ 0.75 0.60pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart D
Forging Scrubber Liquor ------------------------------------------------------------------------
NSPS
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum forged
---------------------------Chromium.................................... 0.035 0.014Cyanide..................................... 0.019 0.008Zinc........................................ 0.096 0.04Aluminum.................................... 0.576 0.256Oil and grease.............................. 0.943 0.95Suspended solids............................ 1.42 1.13pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart D
Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
NSPS
--------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum quenched
--------------------------Chromium..................................... 0.76 0.31Cyanide...................................... 0.41 0.163Zinc......................................... 2.08 0.86Aluminum..................................... 12.45 5.52Oil and grease............................... 20.37 20.37Suspended solids............................. 30.56 24.45pH........................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart D
Cleaning or Etching Bath ------------------------------------------------------------------------
NSPS
---------------------------
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.................................... 0.066 0.027Cyanide..................................... 0.036 0.015Zinc........................................ 0.183 0.075Aluminum.................................... 1.094 0.485Oil and grease.............................. 1.79 1.79Suspended solids............................ 2.69 2.15pH.......................................... (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart D
Cleaning or Etching Rinse ------------------------------------------------------------------------
NSPS
-------------------------
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...................................... 0.52 0.21Cyanide....................................... 0.28 0.11Zinc.......................................... 1.42 0.59Aluminum...................................... 8.5 3.77Oil and grease................................ 13.91 13.91Suspended solids.............................. 20.87 16.69pH............................................ (\1\) (\1\)------------------------------------------------------------------------\1\ Within the range of 7.0 to 10 at all times.
Subpart D
Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------
NSPS
--------------------------
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..................................... 0.72 0.29Cyanide...................................... 0.39 0.155Zinc......................................... 1.97 0.812Aluminum..................................... 11.81 5.24Oil and grease............................... 19.33 19.33Suspended solids............................. 29.00 23.20pH........................................... (\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]