Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduced pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the values set forth below:
Subpart D
Core ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum forged
---------------------------Chromium.................................... 0.022 0.009Cyanide..................................... 0.015 0.006Zinc........................................ 0.073 0.031TTO......................................... 0.035 ............Oil and grease (alternate monitoring 2.6 1.3
parameter).................................------------------------------------------------------------------------
Subpart D
Forging Scrubber Liquor ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum forged
---------------------------Chromium.................................... 0.042 0.017Cyanide..................................... 0.028 0.011Zinc........................................ 0.14 0.058TTO......................................... 0.065 ............Oil and grease (alternate monitoring 4.9 2.5
parameter).................................------------------------------------------------------------------------
Subpart D
Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum quenched
---------------------------Chromium.................................... 0.897 0.37Cyanide..................................... 0.591 0.25Zinc........................................ 2.98 1.24TTO......................................... 1.41 ............Oil and grease (alternate monitoring 110 53
parameter).................................------------------------------------------------------------------------
Subpart D
Cleaning or Etching Bath ------------------------------------------------------------------------
PSES
---------------------------
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 0.11TTO......................................... 0.123 ............Oil and grease (alternate monitoring 9.3 4.7
parameter).................................------------------------------------------------------------------------
Subpart D
Cleaning or Etching Rinse ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mb/off-kg (lb/million off-
lbs) of aluminum cleaned
or etched
---------------------------Chromium.................................... 1.7 0.7Cyanide..................................... 1.2 0.5Zinc........................................ 5.7 2.4TTO......................................... 2.7 ............Oil and grease (alternate monitoring 200 100
parameter).................................------------------------------------------------------------------------
Subpart D
Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------
PSES
--------------------------
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 0.35Cyanide...................................... 0.561 0.23Zinc......................................... 2.82 1.18TTO.......................................... 1.34 ...........Oil and grease (alternate monitoring 100 50
parameter)..................................------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, and 11635, Mar. 27, 1984, as amended at 53 FR 52369-52371, Dec. 27, 1988]