Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces 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 following values:
Subpart A
Core With an Annealing Furnace Scrubber ------------------------------------------------------------------------
PSES
-----------------------------
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.................................. 0.036 0.015Cyanide................................... 0.024 0.010Zinc...................................... 0.119 0.050TTO....................................... 0.057 ..............Oil and grease (alternate monitoring 4.3 2.1
parameter)...............................------------------------------------------------------------------------
Subpart A
Core Without an Annealing Furnace Scrubber ------------------------------------------------------------------------
PSES
---------------------------
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.................................... 0.025 0.010Cyanide..................................... 0.016 0.007Zinc........................................ 0.081 0.034TTO......................................... 0.038 ............Oil and grease (alternate monitoring 2.9 1.5
parameter).................................------------------------------------------------------------------------
Subpart A
Continuous Sheet Casting Lubricant ------------------------------------------------------------------------
PSES
---------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million off-
lbs) of aluminum cast
---------------------------Chromium.................................... 0.00086 0.00035Cyanide..................................... 0.00057 0.00024Zinc........................................ 0.0029 0.0012TTO......................................... 0.0014 ............Oil and grease (alternate monitoring 0.10 0.052
parameter).................................------------------------------------------------------------------------
Subpart A
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.................................... 0.90 0.37Cyanide..................................... 0.59 0.25Zinc........................................ 2.98 1.25TTO......................................... 1.41 ............Oil and grease (alternate monitoring 110 53
parameter).................................------------------------------------------------------------------------
Subpart A
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........................................ 0.262 0.109TTO......................................... 0.124 ............Oil and grease (alternate monitoring 9.3 4.7
parameter).................................------------------------------------------------------------------------
Subpart A
Cleaning or Etching Rinse ------------------------------------------------------------------------
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.................................... 0.61 0.25Cyanide..................................... 0.41 0.17Zinc........................................ 2.03 0.85TTO......................................... 0.96 ............Oil and grease (alternate monitoring 73 36
parameter).................................------------------------------------------------------------------------
Subpart A
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.................................... 0.85 0.35Cyanide..................................... 0.56 0.23Zinc........................................ 2.82 1.18TTO......................................... 1.34 ............Oil and grease (alternate monitoring 100 50
parameter).................................------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984, as amended at 53 FR 52369, 52370, Dec. 27, 1988]