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

§ 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

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
Chromium0.160.066
Cyanide0.110.044
Zinc0.530.22
Aluminum2.341.16
Oil and grease7.324.39
Suspended solids15.07.13
pH( 1)( 1)

1 Within the range of 7.0 to 10.0 at all times.

Subpart C

Extrusion Press Leakage

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
Chromium0.650.27
Cyanide0.430.18
Zinc2.160.90
Aluminum9.514.73
Oil and grease29.5617.74
Suspended solids60.6028.82
pH( 1)( 1)
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