40 CFR § 467.23
Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable
June 9, 2020
CFR

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

Open Table
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

Open Table
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

Open Table
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

Open Table
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

Open Table
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

Open Table
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 0.85 0.35
Cyanide 0.56 0.23
Zinc 2.82 1.18
Aluminum 12.43 6.19

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11633, Mar. 27, 1984]


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