Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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§ 467.22 Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

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 practicable control technology currently available.

Subpart B

Core

Pollutant or pollutant property BPT 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 0.416
Oil and grease 2.60 1.56
Suspended solids 5.33 2.53
pH (1) (1)

Subpart B

Direct Chill Casting Contact Cooling Water

Pollutant or pollutant property BPT 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
Oil and grease 26.58 15.95
Suspended solids 54.49 25.92
pH (1) (1)

Subpart B

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property BPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium 3.39 1.39
Cyanide 2.24 0.93
Zinc 11.25 4.70
Aluminum 49.55 24.66
Oil and grease 154.10 92.46
Suspended solids 315.91 150.25
pH (1) (1)

Subpart B

Cleaning or Etching Bath

Pollutant or pollutant property BPT 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 0.262 0.109
Aluminum 1.15 0.573
Oil and grease 3.58 2.15
Suspended solids 7.34 3.49
pH (1) (1)

Subpart B

Cleaning or Etching Rinse

Pollutant or pollutant property BPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 6.12 2.51
Cyanide 4.04 1.67
Zinc 20.31 8.49
Aluminum 89.46 44.52
Oil and grease 278.24 166.95
Suspended solids 570.39 271.29
pH (1) (1)

Subpart B

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property BPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 7.00 2.86
Cyanide 4.61 1.91
Zinc 23.22 9.70
Aluminum 102.24 50.88
Oil and grease 318.00 190.80
Suspended solids 651.90 310.05
pH (1) (1)

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]


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