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 B - Copper Casting Subcategory |
§ 464.22 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.
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§ 464.22 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/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 Quench Operations.
BPT 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) 0.0307 0.0168 Lead (T) 0.0315 0.0156 Zinc (T) 0.0455 0.0171 Oil and grease 1.2 0.399 TSS 1.52 0.598 pH (1) (1) 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) 0.79 0.39 0.0088 Zinc (T) 1.14 0.43 0.0108 Oil and grease 30 10 0.199 TSS 38 15 0.399 pH (3) (3) (3) (b) Direct Chill Casting Operations.
BPT 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) 0.928 0.506 Lead (T) 0.952 0.47 Zinc (T) 1.37 0.518 Oil and grease 36.2 12.1 TSS 45.8 18.1 pH (1) (1) 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) 0.79 0.39 0.265 Zinc (T) 1.14 0.43 0.326 Oil and grease 30 10 6.03 TSS 38 15 12.1 pH (3) (3) (3) (c) Dust Collection Scrubber Operations.
BPT Effluent Limitations
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) 0.567 0.28 Zinc (T) 0.818 0.309 Total phenols 0.617 0.215 Oil and grease 21.5 7.18 TSS 27.3 10.8 ph (1) (1) 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) 0.79 0.39 0.158 Zinc (T) 1.14 0.43 0.194 Total phenols 0.86 0.3 0.144 Oil and grease 30 10 3.59 TSS 38 15 7.18 pH (3) (3) (3) (d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(e) Investment Casting.
BPT 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) 8.48 4.63 Lead (T) 8.7 4.3 Zinc (T) 12.6 4.74 Oil and grease 330 110 TSS 419 165 pH (1) (1) 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) 0.79 0.39 2.42 Zinc (T) 1.14 0.43 2.97 Oil and grease 30 10 55.1 TSS 38 15 110 pH (3) (3) (3) (f) Melting Furnace Scrubber Operations.
BPT Effluent Limitations
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) 1.86 0.918 Zinc (T) 2.68 1.01 Total phenols 2.02 0.706 Oil and grease 70.6 23.5 TSS 89.4 35.3 pH (1) (1) 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) 0.79 0.39 0.518 Zinc (T) 1.14 0.43 0.635 Total phenols 0.86 0.3 0.467 Oil and grease 30 10 11.8 TSS 38 15 23.5 pH (3) (3) (3) (g) Mold Cooling Operations.
BPT 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) 0.392 0.214 Lead (T) 0.402 0.199 Zinc (T) 0.58 0.219 Oil and grease 15.3 5.09 TSS 19.3 7.63 pH (1) (1) Maximum for any 1 day Maximum for monthly average Annual average1 (mg/l)2 (mg/l)2 Copper (T) 0.77 0.42 0.0865 Lead (T) 0.79 0.39 0.112 Zinc (T) 1.14 0.43 0.137 Oil and grease 30 10 2.54 TSS 38 15 5.09 pH (3) (3) (3) [50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]