(a) Except as provided in 40 CFR 403.7, any new 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 new sources.
(b) There shall be no discharge allowance for wastewater pollutants from the degassing operation.
(c) The mass of wastewater pollutants from the core and ancillary operations except those identified in paragraph (b) introduced into a POTW shall not exceed the values set forth below:
Subpart C
Core ------------------------------------------------------------------------
PSNS
-------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million
off-lbs) of extruded
-------------------------Chromium...................................... 0.13 0.05Cyanide....................................... 0.07 0.03Zinc.......................................... 0.35 0.15TTO........................................... 0.24 ...........Oil and grease (alternate monitoring 3.40 3.40
parameter)...................................------------------------------------------------------------------------
Subpart C
Extrusion Press Leakage ------------------------------------------------------------------------
PSNS
-------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million
off-lbs) of hard alloy
aluminum extruded
-------------------------Chromium...................................... 0.11 0.05Cyanide....................................... 0.06 0.03Zinc.......................................... 0.31 0.13TTO........................................... 0.21 ...........Oil and grease (alternate monitoring 2.98 2.98
parameter)...................................------------------------------------------------------------------------
Subpart C
Direct Chill Casting Contact Cooling Water ------------------------------------------------------------------------
PSNS
-------------------------
Pollutant or pollutant property Maximum for
Maximum for monthly
any 1 day average------------------------------------------------------------------------
mg/off-kg (lb/million
off-lbs) of aluminum
cast
-------------------------Chromium...................................... 0.49 0.20Cyanide....................................... 0.27 0.11Zinc.......................................... 1.36 0.56TTO........................................... 0.92 ...........Oil and grease (alternate monitoring 13.29 13.29
parameter)...................................------------------------------------------------------------------------
Subpart C
Press Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
PSNS
-------------------------
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 0.17Zinc.......................................... 2.08 0.86TTO........................................... 1.41 ...........Oil and grease (alternate monitoring 20.37 20.37
parameter)...................................------------------------------------------------------------------------
Subpart C
Solution Heat Treatment Contact Cooling Water ------------------------------------------------------------------------
PSNS
-------------------------
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 0.17Zinc.......................................... 2.08 0.86TTO........................................... 1.41 ...........Oil and grease (alternate monitoring 20.37 20.37
parameter)...................................------------------------------------------------------------------------
Subpart C
Cleaning or Etching Bath ------------------------------------------------------------------------
PSNS
-------------------------
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...................................... 0.067 0.027Cyanide....................................... 0.036 0.015Zinc.......................................... 0.183 0.075TTO........................................... 0.124 ...........Oil and grease (alternate monitoring 1.79 1.79
parameter)...................................------------------------------------------------------------------------
Subpart C
Cleaning or Etching Rinse ------------------------------------------------------------------------
PSNS
-------------------------
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 0.59TTO........................................... 0.96 ...........Oil and grease (alternate monitoring 13.91 13.91
parameter)...................................------------------------------------------------------------------------
Subpart C
Cleaning or Etching Scrubber Liquor ------------------------------------------------------------------------
PSNS
-------------------------
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 0.16Zinc.......................................... 1.97 0.81TTO........................................... 1.34 ...........Oil and grease (alternate monitoring 19.33 19.33
parameter)...................................------------------------------------------------------------------------ [48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, and 11634, Mar. 27, 1984]