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 Code of Federal Regulations (Last Updated: November 8, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter N - Effluent Guidelines and Standards
 Part 467 - Aluminum Forming Point Source Category
 Subpart B - Rolling With Emulsions Subcategory

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

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  • § 467.22 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 B

    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 rolled with emulsions
    Chromium 0.057 0.024
    Cyanide 0.038 0.016
    Zinc 0.19 0.079
    Aluminum 0.84 0.416
    Oil and grease 2.60 1.56
    Suspended solids 5.33 2.53
    pH (1) (1)

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

    Subpart B

    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)

    1 The pH shall be maintained within the range of 7.0 to 10.0 at all times except for those situations when this waste stream is discharged separately and without commingling with any other wastewater in which case the pH shall be within the range of 6.0 to 10.0 at all times.

    Subpart B

    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)

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

    Subpart B

    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 0.262 0.109
    Aluminum 1.15 0.573
    Oil and grease 3.58 2.15
    Suspended solids 7.34 3.49
    pH (1) (1)

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

    Subpart B

    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)

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

    Subpart B

    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)

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

    [48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]