Title 40: Protection of Environment
PART 467—ALUMINUM FORMING POINT SOURCE CATEGORY
Subpart C—Extrusion Subcategory
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§ 467.36 Pretreatment standards for new sources.
(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)...................................------------------------------------------------------------------------
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Subpart C
Extrusion Press Leakage
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Direct Chill Casting Contact Cooling Water
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Press Heat Treatment Contact Cooling Water
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Solution Heat Treatment Contact Cooling Water
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Cleaning or Etching Bath
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Cleaning or Etching Rinse
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------
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Subpart C
Cleaning or Etching Scrubber Liquor
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------------------------------------------------------------------------ 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)...................................------------------------------------------------------------------------