§ 467.45 Pretreatment standards for existing sources.
40 CFR 467.45
Citation40 CFR 467.45
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Displayed edition2026-09-09
Last updated2026-09-09
§ 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
[48 FR 49149, Oct. 24, 1983; 49 FR 11632, 11633, 11635, Mar. 27, 1984, as amended at 53 FR 52369, Dec. 27, 1988]