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

Title 40Chapter ISubchapter NPart 464Subpart D → §464.43


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


§464.43   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/1) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Quench 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)0.03440.0187
Lead (T)0.02370.0116
Zinc (T)0.03390.0129
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0076
Lead (T)0.530.260.0067
Zinc (T)0.760.290.008

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

2These concentrations must be multiplied by the ratio of (5.34/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(b) Die Casting 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)0.00660.0036
Lead (T)0.00460.0022
Zinc (T)0.00660.0025
Total phenols0.00740.0026
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.0015
Lead (T)0.530.260.0013
Zinc (T)0.760.290.0016
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.

(c) 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)1.560.852
Lead (T)1.070.527
Zinc (T)1.540.588
Total phenolse1.740.608
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.345
Lead (T)0.530.260.304
Zinc (T)0.760.290.365
Total phenols0.860.30.406

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

2These concentrations must be multiplied by the ratio of (0.243/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(d) 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)0.3040.166
Lead (T)0.2090.103
Zinc (T)0.30.114
   Maximum for any 1 dayMaximum for monthly averageAnnual average1
   (mg/l)2(mg/l)2
Copper (T)0.770.420.067
Lead (T)0.530.260.0591
Zinc (T)0.760.290.071

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

2These concentrations must be multiplied by the ratio of (47.3/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 21762, June 16, 1986]

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