40 CFR § 467.12
Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available
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 for the core operation and for the ancillary operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:

Subpart A

Core With an Annealing Furnace Scrubber

Open Table
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 neat oils
Chromium 0.0360 0.0147
Cyanide 0.0237 0.0098
Zinc 0.119 0.0498
Aluminum 0.525 0.257
Oil and grease 1.634 0.980
Suspended solids 3.348 1.593
pH (1) (1)

1Within the range of 7.0 to 10 at all times.

Subpart A

Core Without an Annealing Furnace Scrubber

Open Table
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 neat oils
Chromium 0.0244 0.010
Cyanide 0.0161 0.0067
Zinc 0.0808 0.0338
Aluminum 0.356 0.174
Oil and grease 1.11 0.664
Suspended solids 2.27 1.079
pH (1) (1)

1Within the range of 7.0 to 10 at all times.

Subpart A

Continuous Sheet Casting Spent Lubricant

Open Table
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 sheet cast by continuous methods
Chromium 0.00086 0.00035
Cyanide 0.00057 0.00024
Zinc 0.0029 0.0012
Aluminum 0.0127 0.0063
Oil and grease 0.0393 0.0236
Suspended solids 0.0805 0.0383
pH (1) (1)

1Within the range of 7.0 to 10 at all times.

Subpart A

Solution Heat Treatment Contact Cooling Water

Open Table
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)

1Within the range of 7.0 to 10 at all times.

Subpart A

Cleaning or Etching Bath

Open Table
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 0.110
Aluminum 1.15 0.573
Oil and grease 3.58 2.15
Suspended solids 7.34 3.49
pH (1) (1)

1Within the range of 7.0 to 10 at all times.

Subpart A

Cleaning or Etching Rinse

Open Table
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)

1Within the range of 7.0 to 10 at all times.

Subpart A

Cleaning or Etching Scrubber Liquor

Open Table
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)

1Within the range of 7.0 to 10 at all times.

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984]


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