Regulations last checked for updates: Oct 18, 2024

Title 40 - Protection of Environment last revised: Oct 16, 2024
All TitlesTitle 40Chapter IPart 467Subpart B - Subpart B—Rolling With Emulsions Subcategory
View all text of Subpart B [§ 467.20 - § 467.27]
§ 467.25 - 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 B Core
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 emulsions
Chromium0.0570.024
Cyanide0.0380.016
Zinc0.1900.079
TTO0.090
Oil and grease (alternate monitoring parameter)6.83.4
Subpart B Direct Chill 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 cast by semi-continuous methods
Chromium0.590.24
Cyanide0.390.16
Zinc1.940.81
TTO0.92
Oil and grease (alternate monitoring parameter)6935
Subpart B 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
Chromium0.900.37
Cyanide0.590.25
Zinc2.981.25
TTO1.41
Oil and grease (alternate monitoring parameter)11053
Subpart B 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
Zinc0.2620.109
TTO0.124
Oil and grease (alternate monitoring parameter)9.34.7
Subpart B 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
Chromium0.610.25
Cyanide0.410.17
Zinc2.030.85
TTO0.96
Oil and grease (alternate monitoring parameter)7336
Subpart B 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
Chromium0.850.35
Cyanide0.560.23
Zinc2.831.18
TTO1.34
Oil and grease (alternate monitoring parameter)10050
[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, 11633, Mar. 27, 1984, as amended at 53 FR 52369, 52370, Dec. 27, 1988]
source: 48 FR 49149, Oct. 24, 1983, unless otherwise noted.
cite as: 40 CFR 467.25
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