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 Code of Federal Regulations (Last Updated: July 5, 2024)
 Title 40 - Protection of Environment
 Chapter I - Environmental Protection Agency
 SubChapter N - Effluent Guidelines and Standards
 Part 464 - Metal Molding and Casting Point Source Category
 Subpart D - Zinc Casting Subcategory

  § 464.44 - New source performance standards.  

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  • § 464.44 New source performance standards.

    Any new source subject to this subpart must achieve the following new source performance standards (NSPS), except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm3 or lb/billion SCF of air scrubbed) effluent standards for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass standards and maximum day and maximum for monthly average concentration (mg/l) standards shall apply. Concentration standards and annual average mass standards shall only apply to non-continuous dischargers.

    (a) Casting Quench Operations.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per million pounds) of metal poured
    Copper (T) 0.0344 0.0187
    Lead (T) 0.0237 0.0116
    Zinc (T) 0.0339 0.0129
    Oil and grease 1.34 0.446
    TSS 0.67 0.536
    pH (1) (1)

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

    Maximum for any 1 day Maximum for monthly average Annual average1
    (mg/l)2 (mg/l)2
    Copper (T) 0.77 0.42 0.0076
    Lead (T) 0.53 0.26 0.0067
    Zinc (T) 0.76 0.29 0.008
    Oil and grease 30 10 0.223
    TSS 15 12 0.116
    pH (3) (3) (3)

    1 kg/1,000 kkg (pounds per million pounds) of metal poured.

    2 These concentrations must be multiplied by the ratio of (5.34/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

    (b) Die Casting Operations.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per million pounds) of metal poured
    Copper (T) 0.0066 0.0036
    Lead (T) 0.0046 0.0022
    Zinc (T) 0.0066 0.0025
    Total phenols 0.0074 0.0026
    Oil and grease 0.259 0.0864
    TSS 0.13 0.104
    pH (1) (1)

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

    Maximum for any 1 day Maximum for monthly average Annual average1
    (mg/l)2 (mg/l)2
    Copper (T) 0.77 0.42 0.0015
    Lead (T) 0.53 0.26 0.0013
    Zinc (T) 0.76 0.29 0.0016
    Total phenols 0.86 0.3 0.0017
    Oil and grease 30 10 0.0432
    TSS 15 12 0.0225
    pH (3) (3) (3)

    1kg/1,000 kkg (pounds per million pounds) of metal poured.

    2These concentrations must be multiplied by the ratio of (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

    3Within the range of 7.0 to 10.0 at all times.

    (c) Melting Furnace Scrubber Operations.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
    Copper (T) 1.56 0.852
    Lead (T) 1.07 0.527
    Zinc (T) 1.54 0.588
    Total phenols 1.74 0.608
    Oil and grease 60.8 20.3
    TSS 30.4 24.3
    pH (1) (1)

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

    Maximum for any 1 day Maximum for monthly average Annual average1
    (mg/l)2 (mg/l)2
    Copper (T) 0.77 0.42 0.345
    Lead (T) 0.53 0.26 0.304
    Zinc (T) 0.76 0.29 0.365
    Total phenols 0.86 0.3 0.406
    Oil and grease 30 10 10.1
    TSS 15 12 5.27
    pH (3) (3) (3)

    1 kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed.

    2 These concentrations must be multiplied by the ratio of (0.243/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

    (d) Mold Cooling Operations.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per million pounds) of metal poured
    Copper (T) 0.304 0.166
    Lead (T) 0.209 0.103
    Zinc (T) 0.3 0.114
    Oil and grease 11.8 3.94
    TSS 5.91 4.73
    pH (1) (1)

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

    Maximum for any 1 day Maximum for monthly average Annual average1
    (mg/l)2 (mg/l)2
    Copper (T) 0.77 0.42 0.067
    Lead (T) 0.53 0.26 0.0591
    Zinc (T) 0.76 0.29 0.071
    Oil and grease 30 10 1.97
    TSS 15 12 1.03
    pH (3) (3) (3)

    1 kg/1,000 kkg (pounds per million pounds) of metal poured.

    2 These concentrations must be multiplied by the ratio of (47.3/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

    [50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]