40 CFR 467.55: 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 values set forth below:

Subpart E

Core

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

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

Chromium 0.022 0.009

Cyanide 0.015 0.006

Zinc 0.073 0.031

TTO 0.035

Oil and grease (alternate monitoring parameter) 2.6 1.3

Subpart E

Continuous Rod 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 rod cast

Chromium 0.0009 0.0004

Cyanide 0.0006 0.0003

Zinc 0.0029 0.0012

TTO 0.0014

Oil and grease (alternate monitoring parameter) 0.10 0.052

Subpart E

Continuous Rod Casting 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 rod cast

Chromium 0.086 0.035

Cyanide 0.057 0.023

Zinc 0.283 0.118

TTO 0.133

Oil and grease (alternate monitoring parameter) 10 5.1

Subpart E

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 0.896 0.367

Cyanide 0.591 0.245

Zinc 2.98 1.24

TTO 1.41

Oil and grease (alternate monitoring parameter) 110 53

Subpart E

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 0.033

Cyanide 0.052 0.022

Zinc 0.262 0.109

TTO 0.124

Oil and grease (alternate monitoring parameter) 9.3 4.7

Subpart E

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 0.612 0.251

Cyanide 0.404 0.17

Zinc 2.03 0.85

TTO 0.96

Oil and grease (alternate monitoring parameter) 73 36

Subpart E

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 0.851 0.348

Cyanide 0.561 0.232

Zinc 2.82 1.18

TTO 1.34

Oil and grease (alternate monitoring parameter) 100 50