Regulations last checked for updates: Oct 18, 2024

Title 40 - Protection of Environment last revised: Oct 16, 2024
All TitlesTitle 40Chapter IPart 467Subpart D - Subpart D—Forging Subcategory
View all text of Subpart D [§ 467.40 - § 467.47]
§ 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
Chromium0.0220.009
Cyanide0.0150.006
Zinc0.0730.031
TTO0.035
Oil and grease (alternate monitoring parameter)2.61.3
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
Chromium0.0420.017
Cyanide0.0280.011
Zinc0.140.058
TTO0.065
Oil and grease (alternate monitoring parameter)4.92.5
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
Chromium0.8970.37
Cyanide0.5910.25
Zinc2.981.24
TTO1.41
Oil and grease (alternate monitoring parameter)11053
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
Chromium0.0790.032
Cyanide0.0520.022
Zinc0.260.11
TTO0.123
Oil and grease (alternate monitoring parameter)9.34.7
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
Chromium1.70.7
Cyanide1.20.5
Zinc5.72.4
TTO2.7
Oil and grease (alternate monitoring parameter)200100
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
Chromium0.8510.35
Cyanide0.5610.23
Zinc2.821.18
TTO1.34
Oil and grease (alternate monitoring parameter)10050
[48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, 11635, Mar. 27, 1984, as amended at 53 FR 52369, Dec. 27, 1988]
source: 48 FR 49149, Oct. 24, 1983, unless otherwise noted.
cite as: 40 CFR 467.45
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