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

Title 40Chapter ISubchapter NPart 464Subpart A → §464.13


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


§464.13   Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 available technology economically achievable, 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 limitations for copper, lead, zinc, and total phenols. 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.

BAT Effluent Limitations

Pollutant or pollutant propertyMaximum for any 1 day Maximum for monthly average
   kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.07710.0421
Lead (T)0.07910.039
Zinc (T)0.1140.0431
   Maximum for any 1 day Maximum for monthly average Annual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.017
Lead (T)0.790.390.022
Zinc (T)1.140.430.027

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

2These 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.

(b) Casting Quench Operations.

BAT Effluent Limitations

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)0.00930.0051
Lead (T)0.00960.0047
Zinc (T)0.01380.0052
   Maximum for any 1 day Maximum for monthly average Annual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0021
Lead (T)0.790.390.0027
Zinc (T)1.140.430.0033

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

2These 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.

(c) Die Casting Operations.

BAT Effluent Limitations

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)0.00660.0036
Lead (T)0.00680.0034
Zinc (T)0.00980.0037
Total Phenols0.00740.0026
   Maximum for any 1 day Maximum for monthly average Annual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0015
Lead (T)0.790.390.0019
Zinc (T)1.140.430.0023
Total Phenols0.860.30.0017

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.

(d) Dust Collection Scrubber Operations.

BAT 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)0.2310.126
Lead (T)0.2370.117
Zinc (T)0.3430.129
Total Phenols0.2580.09
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0511
Lead (T)0.790.390.0661
Zinc (T)1.140.430.0811
Total Phenols0.860.30.0601

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

2These 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.

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

(f) Investment Casting.

BAT 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)8.484.63
Lead (T)8.74.3
Zinc (T)12.64.74
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.421.87
Lead (T)0.790.392.42
Zinc (T)1.140.432.97

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.

(g) Melting Furnace Scrubber Operations.

BAT 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)3.011.64
Lead (T)3.091.52
Zinc (T)4.451.68
Total phenols3.361.17
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.664
Lead (T)0.790.390.859
Zinc (T)1.140.431.05
Total phenols0.860.30.781

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

2These 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.

(h) Mold Cooling Operations.

BAT 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)0.2970.162
Lead (T)0.3050.151
Zinc (T)0.440.166
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0656
Lead (T)0.790.390.0849
Zinc (T)1.140.430.104

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

2These 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.

[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]

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