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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 A - Aluminum Casting Subcategory

  § 464.14 - New source performance standards.  

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  • § 464.14 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 Cleaning 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) 0.0771 0.0421
    Lead (T) 0.0791 0.039
    Zinc (T) 0.114 0.0431
    Oil and grease 3.0 1.0
    TSS 3.8 1.5
    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 0.017
    Lead (T) 0.79 0.39 0.022
    Zinc (T) 1.14 0.43 0.027
    Oil and grease 30 10 0.501
    TSS 38 15 1.0
    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 (12/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) 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) 0.0093 0.0051
    Lead (T) 0.0096 0.0047
    Zinc (T) 0.0138 0.0052
    Oil and grease 0.363 0.121
    TSS 0.46 0.182
    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 0.0021
    Lead (T) 0.79 0.39 0.0027
    Zinc (T) 1.14 0.43 0.0033
    Oil and grease 30 10 0.0605
    TSS 38 15 0.121
    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 (1.45/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.

    (c) Die Casting Operations.

    NSPS

    Pollutant or pollutant property Maximum for one 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) 0.0068 0.0034
    Zinc (T) 0.0098 0.0037
    Total Phenols 0.0074 0.0026
    Oil and grease 0.259 0.0864
    TSS and 0.33 0.13
    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) 0.79 0.39 0.0019
    Zinc (T) 1.14 0.43 0.0023
    Total phenols 0.86 0.3 0.0017
    Oil and grease 30 10 0.0432
    TSS and 38 15 0.0864
    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 (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured)

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

    (d) Dust Collection Scrubber Operations.

    NSPS

    Pollutant of pollutant property Maximum for any 1 day Maximum for monthly average
    kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
    Cooper (T) 0.231 0.126
    Lead (T) 0.237 0.117
    Zinc (T) 0.343 0.129
    Total phenols 0.258 0.09
    Oil and grease 9.01 3.0
    TSS 11.4 4.51
    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
    Cooper (T) 0.77 0.42 0.0511
    Lead (T) 0.79 0.39 0.0661
    Zinc (T) 1.14 0.43 0.0811
    Total phenols 0.86 0.3 0.0601
    Oil and grease 30 10 1.5
    TSS 38 15 3.0
    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 (0.036/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.

    (e) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

    (f) Investment Casting.

    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) 8.48 4.63
    Lead (T) 8.7 4.3
    Zinc (T) 12.6 4.74
    Oil and grease 330 110
    TSS 419 165
    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 1.87
    Lead (T) 0.79 0.39 2.42
    Zinc (T) 1.14 0.43 2.97
    Oil and grease 30 10 55.1
    TSS 38 15 110
    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 (1,320/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.

    (g) 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) 3.01 1.64
    Lead (T) 3.09 1.52
    Zinc (T) 4.45 1.68
    Total phenols 3.36 1.17
    Oil and grease 117 39.1
    TSS 148 58.6
    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 0.664
    Lead (T) 0.79 0.39 0.859
    Zinc (T) 1.14 0.43 1.05
    Total phenols 0.86 0.3 0.781
    Oil and grease 30 10 19.5
    TSS 38 15 39.1
    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 (0.468/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.

    (h) 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) 0.297 0.162
    Lead (T) 0.305 0.151
    Zinc (T) 0.44 0.166
    Oil and grease 11.6 3.86
    TSS 14.7 5.79
    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 0.0656
    Lead (T) 0.79 0.39 0.0849
    Zinc (T) 1.14 0.43 0.104
    Oil and grease 30 10 1.93
    TSS 38 15 3.86
    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 (46.3/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 21760, June 16, 1986]