467.23 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
§ 467.23 Effluent limitations representing the degree of effluent
reduction attainable by the application of the best available
technology economically achievable.
Except as provided in 40 CFR 125.30 through 125.32, any existing
point source subject to this subpart must achieve the following
effluent limitations representing the degree of effluent reduction
attainable by the application of the best available technology
economically achievable. The discharge of process wastewater
pollutants from the core shall not exceed the values set forth
below:
Subpart B Core
Pollutant or
pollutant property
BAT effluent
limitations
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum rolled with emulsions
Chromium
0.057
0.024
Cyanide
0.038
0.016
Zinc
0.19
0.079
Aluminum
0.84
0.42
Subpart B Direct Chill Casting Contact Cooling Water
Pollutant or
pollutant property
BAT effluent
limitations
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cast
Chromium
0.59
0.24
Cyanide
0.39
0.16
Zinc
1.94
0.81
Aluminum
8.55
4.26
Subpart B Solution Heat Treatment Contact Cooling Water
Pollutant or
pollutant property
BAT Effluent
Limitations
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum quenched
Chromium
0.90
0.37
Cyanide
0.59
0.25
Zinc
2.98
1.25
Aluminum
13.10
6.52
Subpart B Cleaning or Etching Bath
Pollutant or
pollutant property
BAT effluent
limitations
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
0.109
Aluminum
1.15
0.573
Subpart B Cleaning or Etching Rinse
Pollutant or
pollutant property
BAT effluent
limitations
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cleaned or etched
Chromium
0.61
0.25
Cyanide
0.41
0.17
Zinc
2.03
0.85
Aluminum
8.95
4.45
Subpart B Cleaning or Etching Scrubber Liquor
Pollutant or
pollutant property
BAT effluent
limitations
Maximum for any 1 day
Maximum for monthly
average
mg/off-kg
(lb/million off-lbs) of aluminum cleaned or etched