(a) 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.
(b) There shall be no discharge allowance for wastewater
pollutants from the degassing operation.
(c) The mass of wastewater pollutants from the core and
ancillary operations except those identified in paragraph (b)
introduced into a POTW shall not exceed the values set forth
below:
Subpart C Core
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of extruded
Chromium
0.13
0.05
Cyanide
0.07
0.03
Zinc
0.35
0.15
TTO
0.24
Oil and grease
(alternate monitoring parameter)
3.40
3.40
Subpart C Extrusion Press Leakage
Pollutant or
pollutant property
PSNS
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of hard alloy aluminum extruded
Chromium
0.11
0.05
Cyanide
0.06
0.03
Zinc
0.31
0.13
TTO
0.21
Oil and grease
(alternate monitoring parameter)
2.98
2.98
Subpart C Direct Chill Casting 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 cast
Chromium
0.49
0.20
Cyanide
0.27
0.11
Zinc
1.36
0.56
TTO
0.92
Oil and grease
(alternate monitoring parameter)
13.29
13.29
Subpart C Press 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
0.17
Zinc
2.08
0.86
TTO
1.41
Oil and grease
(alternate monitoring parameter)
20.37
20.37
Subpart C 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
0.17
Zinc
2.08
0.86
TTO
1.41
Oil and grease
(alternate monitoring parameter)
20.37
20.37
Subpart C 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 C 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 C 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