40 CFR 467.15: Pretreatment standards for existing sources.

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

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium 0.036 0.015

Cyanide 0.024 0.010

Zinc 0.119 0.050

TTO 0.057

Oil and grease (alternate monitoring parameter) 4.3 2.1

Subpart A

Core Without an Annealing Furnace Scrubber

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils

Chromium 0.025 0.010

Cyanide 0.016 0.007

Zinc 0.081 0.034

TTO 0.038

Oil and grease (alternate monitoring parameter) 2.9 1.5

Subpart A

Continuous Sheet Casting Lubricant

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cast

Chromium 0.00086 0.00035

Cyanide 0.00057 0.00024

Zinc 0.0029 0.0012

TTO 0.0014

Oil and grease (alternate monitoring parameter) 0.10 0.052

Subpart A

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum quenched

Chromium 0.90 0.37

Cyanide 0.59 0.25

Zinc 2.98 1.25

TTO 1.41

Oil and grease (alternate monitoring parameter) 110 53

Subpart A

Cleaning or Etching Bath

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.079 0.032

Cyanide 0.052 0.022

Zinc 0.262 0.109

TTO 0.124

Oil and grease (alternate monitoring parameter) 9.3 4.7

Subpart A

Cleaning or Etching Rinse

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.61 0.25

Cyanide 0.41 0.17

Zinc 2.03 0.85

TTO 0.96

Oil and grease (alternate monitoring parameter) 73 36

Subpart A

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched

Chromium 0.85 0.35

Cyanide 0.56 0.23

Zinc 2.82 1.18

TTO 1.34

Oil and grease (alternate monitoring parameter) 100 50