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

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§ 467.32 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 C

Core

Expand 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 extruded
Chromium 0.16 0.066
Cyanide 0.11 0.044
Zinc 0.53 0.22
Aluminum 2.34 1.16
Oil and grease 7.32 4.39
Suspended solids 15.0 7.13
pH (1) (1)

Subpart C

Extrusion Press Leakage

Expand 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 extruded
Chromium 0.65 0.27
Cyanide 0.43 0.18
Zinc 2.16 0.90
Aluminum 9.51 4.73
Oil and grease 29.56 17.74
Suspended solids 60.60 28.82
pH (1) (1)

Subpart C

Direct Chill Casting Contact Cooling Water

Expand 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 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 C

Press Heat Treatment Contact Cooling Water

Expand 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)

Subpart C

Solution Heat Treatment Contact Cooling Water

Expand 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)

Subpart C

Cleaning or Etching Bath

Expand 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 0.26 0.109
Aluminum 1.15 0.573
Oil and grease 3.58 2.15
Suspended solids 7.34 3.49
pH (1) (1)

Subpart C

Cleaning or Etching Rinse

Expand 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)

Subpart C

Cleaning or Etching Scrubber Liquor

Expand 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)

Subpart C

Degassing Scrubber Liquor

Expand 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 degassed
Chromium 1.15 0.47
Cyanide 0.76 0.32
Zinc 3.81 1.59
Aluminum 16.78 8.35
Oil and grease 52.18 31.31
Suspended solids 106.97 50.88
pH (1) (1)

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11633, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]


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