Except as provided in 40 CFR 403.7, any new 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 new 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
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum forged
Chromium
0.019
0.008
Cyanide
0.010
0.004
Zinc
0.051
0.021
TTO
0.035
Oil and grease
(alternate monitoring parameter)
0.50
0.50
Subpart D Forging Scrubber Liquor
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum forged
Chromium
0.035
0.014
Cyanide
0.019
0.008
Zinc
0.096
0.040
TTO
0.065
Oil and grease
(alternate monitoring parameter)
0.95
0.95
Subpart D Solution Heat Treatment Contact Cooling Water
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum quenched
Chromium
0.76
0.31
Cyanide
0.41
0.16
Zinc
2.08
0.86
TTO
1.41
Oil and grease
(alternate monitoring parameter)
20.37
20.37
Subpart D Cleaning or Etching Bath
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cleaned or etched
Chromium
0.067
0.027
Cyanide
0.036
0.015
Zinc
0.183
0.075
TTO
0.124
Oil and grease
(alternate monitoring parameter)
1.79
1.79
Subpart D Cleaning or Etching Rinse
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cleaned or etched
Chromium
0.52
0.21
Cyanide
0.28
0.11
Zinc
1.42
0.59
TTO
0.96
Oil and grease
(alternate monitoring parameter)
13.91
13.91
Subpart D Cleaning or Etching Scrubber Liquor
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cleaned or etched