40 CFR 467.45: Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduced 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 D

Core

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

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

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 D

Forging 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 forged

Chromium 0.042 0.017

Cyanide 0.028 0.011

Zinc 0.14 0.058

TTO 0.065

Oil and grease (alternate monitoring parameter) 4.9 2.5

Subpart D

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 0.897 0.37

Cyanide 0.591 0.25

Zinc 2.98 1.24

TTO 1.41

Oil and grease (alternate monitoring parameter) 110 53

Subpart D

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 0.26 0.11

TTO 0.123

Oil and grease (alternate monitoring parameter) 9.3 4.7

Subpart D

Cleaning or Etching Rinse

Pollutant or pollutant property PSES

Maximum for any 1 day Maximum for monthly average

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

Chromium 1.7 0.7

Cyanide 1.2 0.5

Zinc 5.7 2.4

TTO 2.7

Oil and grease (alternate monitoring parameter) 200 100

Subpart D

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 0.35

Cyanide 0.561 0.23

Zinc 2.82 1.18

TTO 1.34

Oil and grease (alternate monitoring parameter) 100 50