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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter N - Effluent Guidelines and Standards |
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Part 467 - Aluminum Forming Point Source Category |
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Subpart C - Extrusion Subcategory |
§ 467.32 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
Latest version.
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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
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
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
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
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
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
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
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
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
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]