40 C.F.R. § 467.12

Current through September 30, 2024
Section 467.12 - 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 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

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils
Chromium0.03600.0147
Cyanide0.02370.0098
Zinc0.1190.0498
Aluminum0.5250.257
Oil and grease1.6340.980
Suspended solids3.3481.593
pH(1)(1)

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

Subpart A

Core Without an Annealing Furnace Scrubber

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum rolled with neat oils
Chromium0.02440.010
Cyanide0.01610.0067
Zinc0.08080.0338
Aluminum0.3560.174
Oil and grease1.110.664
Suspended solids2.271.079
pH(1)(1)

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

Subpart A

Continuous Sheet Casting Spent Lubricant

Pollutant or pollutant propertyBPT 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
Chromium0.000860.00035
Cyanide0.000570.00024
Zinc0.00290.0012
Aluminum0.01270.0063
Oil and grease0.03930.0236
Suspended solids0.08050.0383
pH(1)(1)

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

Subpart A

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium3.391.39
Cyanide2.240.93
Zinc11.254.70
Aluminum49.5524.66
Oil and grease154.1092.46
Suspended solids315.91150.25
pH(1)(1)

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

Subpart A

Cleaning or Etching Bath

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium0.0790.032
Cyanide0.0520.022
Zinc0.2620.110
Aluminum1.150.573
Oil and grease3.582.15
Suspended solids7.343.49
pH(1)(1)

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

Subpart A

Cleaning or Etching Rinse

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium6.122.51
Cyanide4.041.67
Zinc20.318.49
Aluminum89.4644.52
Oil and grease278.24166.95
Suspended solids570.39271.29
pH(1)(1)

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

Subpart A

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant propertyBPT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium7.002.86
Cyanide4.611.91
Zinc23.229.70
Aluminum102.2450.88
Oil and grease318.00190.80
Suspended solids651.90310.05
pH(1)(1)

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

40 C.F.R. §467.12

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