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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 C - Ferrous Casting Subcategory

  § 464.34 - New source performance standards.  

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  • § 464.34 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/1,000 kkg or lb/million lb of sand reclaimed; 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.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 0.0129 0.0071
    Lead (T) 0.0237 0.0116
    Zinc (T) 0.0437 0.0165
    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) 0.29 0.16 0.0029
    Lead (T) 0.53 0.26 0.0067
    Zinc (T) 0.98 0.37 0.0116
    Oil and grease 30 10 0.223
    TTS 15 12 0.116
    pH (3) (3) (3)

    1 kg/1000 kkg (pounds per million pounds) of metal poured.

    2 These concentrations must be multiplied by the ratio of (5.33/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.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 0.0129 0.0071
    Lead (T) 0.0353 0.0174
    Zinc (T) 0.0656 0.025
    Oil and grease 1.34 0.446
    TSS 1.7 0.67
    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) 0.29 0.16 0.0029
    Lead (T) 0.79 0.39 0.0098
    Zinc (T) 1.47 0.56 0.0179
    Oil and grease 30 10 0.223
    TTS 38 15 0.446
    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 (5.35/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.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 0.0138 0.0076
    Lead (T) 0.0252 0.0124
    Zinc (T) 0.0466 0.0176
    Oil and grease 1.43 0.476
    TSS 0.713 0.571
    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) 0.29 0.16 0.0031
    Lead (T) 0.53 0.26 0.0071
    Zinc (T) 0.98 0.37 0.0124
    Oil and grease 30 10 0.238
    TSS 15 12 0.124
    pH (3) (3) (3)

    1 Kg/1000 kkg (pounds per million pounds) of metal poured.

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

    3 These concentrations must be multiplied by the ratio of (5.7/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 0.0138 0.0076
    Lead (T) 0.0376 0.0185
    Zinc (T) 0.0699 0.0266
    Oil and grease 1.43 0.476
    TSS 1.81 0.713
    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) 0.29 0.16 0.0031
    Lead (T) 0.79 0.39 0.0105
    Zinc (T) 1.47 0.56 0.019
    Oil and grease 30 10 0.238
    TSS 38 15 0.476
    pH (3) (3) (3)

    1 Kg/1000 kkg (pounds per million pounds) of metal poured.

    2 These concentrations must be multiplied by the ratio of (5.7/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.

    (1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 0.218 0.12
    Lead (T) 0.398 0.195
    Zinc (T) 0.736 0.278
    Total Phenols 0.646 0.225
    Oil and grease 22.5 7.51
    TSS 11.3 9.01
    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) 0.29 0.16 0.0488
    Lead (T) 0.53 0.26 0.113
    Zinc (T) 0.98 0.37 0.195
    Total phenols 0.86 0.3 0.15
    Oil and grease 30 10 3.76
    TSS 15 12 1.95
    pH (3) (3) (3)

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

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

    3 These concentrations must be multiplied by the ratio of (0.09/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 0.218 0.12
    Lead (T) 0.593 0.293
    Zinc (T) 1.1 0.421
    Total phenols 0.656 0.225
    Oil and grease 22.5 7.51
    TSS 28.5 11.3
    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) 0.29 0.16 0.0488
    Lead (T) 0.79 0.39 0.165
    Zinc (T) 1.47 0.56 0.3
    Total phenols 0.86 0.3 0.15
    Oil and grease 30 10 3.76
    TSS 38 15 7.51
    pH (3) (3) (3)

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

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

    3 These concentrations must be multiplied by the ratio of (0.09/) where is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

    (e) Investment Casting.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 3.19 1.76
    Lead (T) 5.84 2.86
    Zinc (T) 10.8 4.07
    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) 0.29 0.16 0.716
    Lead (T) 0.53 0.26 1.65
    Zinc (T) 0.98 0.37 2.86
    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.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 3.19 1.76
    Lead (T) 8.7 4.3
    Zinc (T) 16.2 6.17
    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) 0.29 0.16 0.716
    Lead (T) 0.79 0.39 2.42
    Zinc (T) 1.47 0.56 4.41
    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.

    (f) Melting Furnace Scrubber Operations.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 1.02 0.561
    Lead (T) 1.86 0.911
    Zinc (T) 3.44 1.30
    Total phenols 3.01 1.05
    Oil and grease 105 35
    TSS 52.6 42.1
    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 average
    (mg/l)2 (mg/l)2
    Copper (T) 0.29 0.16 0.228
    Lead (T) 0.53 0.26 0.526
    Zinc (T) 0.98 0.37 0.911
    Total phenols 0.86 0.3 0.701
    Oil and grease 30 10 17.5
    TSS 15 12 9.11
    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 (0.42/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.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 1.02 0.561
    Lead (T) 2.77 1.37
    Zinc (T) 5.15 1.96
    Total phenols 3.01 1.05
    Oil and grease 105 35
    TSS 133 52.6
    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 average
    (mg/l)2 (mg/l)2
    Copper (T) 0.29 0.16 0.228
    Lead (T) 0.79 0.39 0.771
    Zinc (T) 1.47 0.56 1.4
    Total phenols 0.38 0.3 0.701
    Oil and grease 30 10 17.5
    TSS 38 15 35
    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 (0.42/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.

    (g) Mold Cooling Operations.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 0.0428 0.0236
    Lead (T) 0.0783 0.0384
    Zinc (T) 0.0145 0.0546
    Oil and grease 4.43 1.48
    TSS 2.22 1.77
    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)1
    Copper (T) 0.29 0.16 0.0096
    Lead (T) 0.53 0.26 0.0222
    Zinc (T) 0.98 0.37 0.0384
    Oil and grease 30 10 0.738
    TSS 15 12 0.384
    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 (17.7/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.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 0.0428 0.0236
    Lead (T) 0.117 0.0576
    Zinc (T) 0.217 0.0827
    Oil and grease 4.43 1.48
    TSS 5.61 2.22
    pH (1) (1)

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

    Maximum for any 1 day Maxium for monthly average Annual average1
    (mg/1)2 (mg/l)2
    Copper (T) 0.29 0.16 0.0096
    Lead (T) 0.79 0.39 0.0325
    Zinc (T) 1.47 0.56 0.0591
    Oil and grease 30 10 0.738
    TSS 38 15 1.48
    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 (17.7/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.

    (h) Slag Quench Operations.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    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) 0.0527 0.0291
    Lead (T) 0.0964 0.0473
    Zinc (T) 0.178 0.0673
    Oil and grease 5.46 1.82
    TSS 2.73 2.18
    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) 0.29 0.16 0.0118
    Lead (T) 0.53 0.26 0.0273
    Zinc (T) 0.98 0.37 0.0473
    Oil and grease 30 10 0.909
    TSS 15 12 0.473
    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 (21.8/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.

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    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) 0.0527 0.0291
    Lead (T) 0.144 0.0709
    Zinc (T) 0.267 0.102
    Oil and grease 5.46 1.82
    TSS 6.91 2.73
    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 average
    (mg/l)2 (mg/1)2
    Copper (T) 0.29 0.16 0.0118
    Lead (T) 0.79 0.39 0.04
    Zinc (T) 1.47 0.56 0.0728
    Oil and grease 30 10 0.909
    TSS 38 15 1.82
    pH (3) (3) (3)

    1 kg/1000 kkg (pounds per million pounds) of metal poured.

    2 These concentrations must be multiplied by the ratio of (21.8/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.

    (i) Wet Sand Reclamation Operations.

    (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per million pounds) of sand reclaimed
    Copper (T) 0.217 0.12
    Lead (T) 0.396 0.194
    Zinc (T) 0.732 0.276
    Total phenols 0.642 0.224
    Oil and grease 22.4 7.47
    TSS 11.2 8.96
    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) 0.29 0.16 0.0485
    Lead (T) 0.53 0.26 0.112
    Zinc (T) 0.98 0.37 0.194
    Total phenols 0.86 0.3 0.149
    Oil and grease 30 10 3.73
    TSS 15 12 1.94
    pH (3) (3) (3)

    1 kg/1,000 kkg (pounds per million pounds) of sand reclaimed.

    2 These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) for a specific plant.

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

    (2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

    NSPS

    Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
    kg/1,000 kkg (pounds per million pounds) of sand reclaimed
    Copper (T) 0.217 0.12
    Lead (T) 0.59 0.291
    Zinc (T) 1.1 0.418
    Total phenols 0.642 0.224
    Oil and grease 22.4 7.47
    TSS 28.4 11.2
    pH (1) (1)

    1 Within the range of 7.0 to at all times.

    Maximum for any 1 day Maximum for monthly average Annual average1
    (mg/l)2 (mg/l)2
    Copper (T) 0.29 0.16 0.0485
    Lead (T) 0.79 0.39 0.164
    Zinc (T) 1.47 0.56 0.299
    Total phenols 0.86 0.3 0.149
    Oil and grease 30 10 3.73
    TSS 38 15 7.47
    pH (3) (3) (3)

    1 kg/1,000 kkg (pounds per million pounds) of sand reclaimed.

    2 These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) 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]