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 B
Core ------------------------------------------------------------------------
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 emulsions
---------------------------Chromium.................................... 0.057 0.024Cyanide..................................... 0.038 0.016Zinc........................................ 0.190 0.079TTO......................................... 0.090 ............Oil and grease (alternate monitoring 6.8 3.4
parameter).................................------------------------------------------------------------------------
Subpart B
Direct Chill Casting 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 cast by
semi-continuous methods
---------------------------Chromium.................................... 0.59 0.24Cyanide..................................... 0.39 0.16Zinc........................................ 1.94 0.81TTO......................................... 0.92 ............Oil and grease (alternate monitoring 69 35
parameter).................................------------------------------------------------------------------------
Subpart B
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 B
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 B
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 B
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........................................ 2.83 1.18TTO......................................... 1.34 ............Oil and grease (alternate monitoring 100 50
parameter).................................------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, 11633, Mar. 27, 1984, as amended at 53 FR 52369, 52370, Dec. 27, 1988]