View all text of Subpart B [§ 464.20 - § 464.27]
§ 464.24 - 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/62.3 million Sm 3 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 Quench Operations.
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) | 0.0307 | 0.0168 | Lead (T) | 0.0211 | 0.0104 | Zinc (T) | 0.0303 | 0.0116 | Oil and grease | 1.2 | 0.399 | TSS | 0.598 | 0.479 | 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 1 | (mg/l) 2 | (mg/l) 2 | Copper (T) | 0.77 | 0.42 | 0.0068 | Lead (T) | 0.53 | 0.26 | 0.006 | Zinc (T) | 0.76 | 0.29 | 0.0072 | Oil and grease | 30 | 10 | 0.199 | TSS | 15 | 12 | 0.104 | pH | ( 3) | ( 3) | ( 3) |
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1 kg/1,000 kkg (pounds per million pounds) of metal poured.
2 These concentrations must be multiplied by the ratio of (4.8/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.
(b) Direct Chill Casting Operations.
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) | 0.928 | 0.506 | Lead (T) | 0.639 | 0.314 | Zinc (T) | 0.916 | 0.35 | Oil and grease | 36.2 | 12.1 | TSS | 18.1 | 14.5 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average 1 | (mg/l) 2 | (mg/l) 2 | Copper (T) | 0.77 | 0.42 | 0.205 | Lead (T) | 0.53 | 0.26 | 0.181 | Zinc (T) | 0.76 | 0.29 | 0.217 | Oil and grease | 30 | 10 | 6.03 | TSS | 15 | 12 | 3.13 | pH | ( 3) | ( 3) | ( 3) |
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1 kg/1,000 kkg (pounds per million pounds) of metal poured.
2 These concentrations must be multiplied by the ratio of (145/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.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed | Copper (T) | 0.553 | 0.301 | Lead (T) | 0.38 | 0.187 | Zinc (T) | 0.545 | 0.208 | Total phenols | 0.617 | 0.215 | Oil and grease | 21.5 | 7.18 | TSS | 10.8 | 8.61 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average 1 | (mg/l) 2 | (mg/l) 2 | Copper (T) | 0.77 | 0.42 | 0.122 | Lead (T) | 0.53 | 0.26 | 0.108 | Zinc (T) | 0.76 | 0.29 | 0.129 | Total phenols | 0.86 | 0.3 | 0.144 | Oil and grease | 30 | 10 | 3.59 | TSS | 15 | 12 | 1.87 | pH | ( 3) | ( 3) | ( 3) |
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1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.
2 These concentrations must be multiplied by the ratio of (0.086/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.
(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(e) Investment Casting.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | kg/1,000 kkg (pounds per millions pounds) of metal poured | Copper (T) | 8.48 | 4.63 | Lead (T) | 5.84 | 2.86 | Zinc (T) | 8.37 | 3.19 | Oil and grease | 330 | 110 | TSS | 165 | 132 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average 1 | (mg/l) 2 | mg/l) 2 | Copper (T) | 0.77 | 0.42 | 1.87 | Lead (T) | 0.53 | 0.26 | 1.65 | Zinc (T) | 0.76 | 0.29 | 1.98 | Oil and grease | 30 | 10 | 55.1 | TSS | 15 | 12 | 28.6 | pH | ( 3) | ( 3) | ( 3) |
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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.
NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average | kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed | Copper (T) | 1.81 | 0.988 | Lead (T) | 1.25 | 0.612 | Zinc (T) | 1.79 | 0.673 | Total phenols | 2.02 | 0.706 | Oil and grease | 70.6 | 23.5 | TSS | 35.3 | 28.2 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average 1 | (mg/l) 2 | (mg/l) 2 | Copper (T) | 0.77 | 0.42 | 0.4 | Lead (T) | 0.53 | 0.26 | 0.353 | Zinc (T) | 0.76 | 0.29 | 0.424 | Total phenols | 0.86 | 0.3 | 0.471 | Oil and grease | 30 | 10 | 11.8 | TSS | 15 | 12 | 6.12 | pH | ( 3) | ( 3) | ( 3) |
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1 kg/62.3 Sm 3 (pounds per billion SCF) of air scrubbed.
2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process waste-water 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.
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) | 0.392 | 0.214 | Lead (T) | 0.27 | 0.132 | Zinc (T) | 0.387 | 0.148 | Oil and grease | 15.3 | 5.09 | TSS | 7.63 | 6.11 | pH | ( 1) | ( 1) |
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1 Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average 1 | (mg/1) 2 | (mg/1) 2 | Copper (T) | 0.77 | 0.42 | 0.0865 | Lead (T) | 0.53 | 0.26 | 0.0763 | Zinc (T) | 0.76 | 0.29 | 0.0916 | Oil and grease | 30 | 10 | 2.54 | TSS | 15 | 12 | 1.32 | pH | ( 3) | ( 3) | ( 3) |
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1 kg/1,000 kkg (pounds per million pound) of metal poured.
2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process waste-water 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.