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e-CFR data is current as of November 24, 2020

Title 40Chapter ISubchapter NPart 464Subpart C → §464.32


Title 40: Protection of Environment
PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY
Subpart C—Ferrous Casting Subcategory


§464.32   Effluent limitations guidelines 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, 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 limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Cleaning Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.01290.0071
Lead (T)0.03530.0174
Zinc (T)0.06560.025
Oil and grease1.340.446
TSS1.70.67
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.0029
Lead (T)0.790.390.0098
Zinc (T)1.470.560.0179
Oil and grease30100.223
TSS38150.446
pH(3)(3)(3)

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

2These concentrations must be multiplied by the ratio (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.

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

(b) Casting Quench Operations

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.01380.0076
Lead (T)0.03760.0185
Zinc (T)0.06990.0266
Oil and grease1.430.476
TSS1.810.713
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.0031
Lead (T)0.790.390.0105
Zinc (T)1.470.560.019
Oil and grease30100.238
TSS38150.476
pH(3)(3)(3)

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

2These 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.

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

(c) Dust Collection Scrubber Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
Copper (T)0.2180.12
Lead (T)0.5930.293
Zinc (T)1.10.421
Total phenols0.6560.225
Oil and grease22.57.51
TSS28.511.3
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2(mg/l)2
Copper (T)0.290.160.0488
Lead (T)0.790.390.165
Zinc (T)1.470.560.3
Total phenols0.860.30.15
Oil and grease30103.76
TSS38157.51
pH(3)(3)(3)

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

2These concentrations must be multiplied by the ratio (0.090/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

3Within 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.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)3.191.76
Lead (T)8.74.3
Zinc (T)16.26.17
Oil and grease330110
TSS419165
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.716
Lead (T)0.790.392.42
Zinc (T)1.470.564.41
Oil and grease301055.1
TSS3815110
pH(3)(3)(3)

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

2These concentrations must be multiplied by the ratio of (1,320/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.

(f) Melting Furnace Scrubber Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed
Copper (T)1.020.561
Lead (T)2.771.37
Zinc (T)5.151.96
Total phenols3.011.05
Oil and grease10535
TSS13352.6
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.228
Lead (T)0.790.390.771
Zinc (T)1.470.561.4
Total phenols0.860.30.701
Oil and grease301017.5
TSS381535
pH(3)(3)(3)

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

2These 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.

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

(g) Mold Cooling Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.04280.0236
Lead (T)0.1170.0576
Zinc (T)0.2170.0827
Oil and grease4.431.48
TSS5.612.22
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.0096
Lead (T)0.790.390.0325
Zinc (T)1.470.560.0591
Oil and grease30100.738
TSS38151.48
pH(3)(3)(3)

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

2These 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.

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

(h) Slag Quench Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Cooper (T)0.05270.0291
Lead (T)0.1440.0709
Zinc (T)0.2670.102
Oil and grease5.461.82
TSS6.912.73
pH(1)(1)

1Within the range 7.0 to 10.0 at all times.

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.290.160.0118
Lead (T)0.790.390.04
Zinc (T)1.470.560.0728
Oil and grease30100.909
TSS38151.82
pH(3)(3)(3)

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

2These concentrations must be multiplied by the ratio of (21.8/x) where x is the actual normalized process wasterwater 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.

(i) Wet Sand Reclamation Operations.

BPT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 dayMaximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of sand reclaimed
Cooper (T)0.2170.12
Lead (T)0.590.291
Zinc (T)1.10.418
Total phenols0.6420.224
Oil and grease22.47.47
TSS28.411.2
pH(1)(1)

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

   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Cooper (T)0.290.160.0485
Lead (T)0.790.390.164
Zinc (T)1.470.560.299
Total phenols0.860.30.149
Oil and grease30103.73
TSS38157.47
pH(3)(3)(3)

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

2These 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.

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

[50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986]

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