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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 464 - Metal Molding and Casting Point Source Category
 Subpart B - Copper Casting Subcategory

  § 464.24 - New source performance standards.  

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  • § 464.24 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) 0.0307 0.0168
    Lead (T) 0.0211 0.0104
    Zinc (T) 0.0303 0.0116
    Oil and grease 1.2 0.399
    TSS 0.598 0.479
    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 0.0068
    Lead (T) 0.53 0.26 0.006
    Zinc (T) 0.76 0.29 0.0072
    Oil and grease 30 10 0.199
    TSS 15 12 0.104
    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 (4.8/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) Direct Chill 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) 0.928 0.506
    Lead (T) 0.639 0.314
    Zinc (T) 0.916 0.35
    Oil and grease 36.2 12.1
    TSS 18.1 14.5
    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 0.205
    Lead (T) 0.53 0.26 0.181
    Zinc (T) 0.76 0.29 0.217
    Oil and grease 30 10 6.03
    TSS 15 12 3.13
    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 (145/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) Dust Collection 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) 0.553 0.301
    Lead (T) 0.38 0.187
    Zinc (T) 0.545 0.208
    Total phenols 0.617 0.215
    Oil and grease 21.5 7.18
    TSS 10.8 8.61
    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 0.122
    Lead (T) 0.53 0.26 0.108
    Zinc (T) 0.76 0.29 0.129
    Total phenols 0.86 0.3 0.144
    Oil and grease 30 10 3.59
    TSS 15 12 1.87
    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 (0.086/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) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

    (e) Investment Casting.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per millions pounds) of metal poured
    Copper (T) 8.48 4.63
    Lead (T) 5.84 2.86
    Zinc (T) 8.37 3.19
    Oil and grease 330 110
    TSS 165 132
    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) 0.53 0.26 1.65
    Zinc (T) 0.76 0.29 1.98
    Oil and grease 30 10 55.1
    TSS 15 12 28.6
    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.

    (f) 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) 1.81 0.988
    Lead (T) 1.25 0.612
    Zinc (T) 1.79 0.673
    Total phenols 2.02 0.706
    Oil and grease 70.6 23.5
    TSS 35.3 28.2
    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 0.4
    Lead (T) 0.53 0.26 0.353
    Zinc (T) 0.76 0.29 0.424
    Total phenols 0.86 0.3 0.471
    Oil and grease 30 10 11.8
    TSS 15 12 6.12
    pH (3) (3) (3)

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

    2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process waste-water 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.

    (g) 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) 0.392 0.214
    Lead (T) 0.27 0.132
    Zinc (T) 0.387 0.148
    Oil and grease 15.3 5.09
    TSS 7.63 6.11
    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/1)2 (mg/1)2
    Copper (T) 0.77 0.42 0.0865
    Lead (T) 0.53 0.26 0.0763
    Zinc (T) 0.76 0.29 0.0916
    Oil and grease 30 10 2.54
    TSS 15 12 1.32
    pH (3) (3) (3)

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

    2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process waste-water 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 21761, June 16, 1986]