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 Sm3 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) | 0.0344 | 0.0187 |
| Lead (T) | 0.0237 | 0.0116 |
| Zinc (T) | 0.0339 | 0.0129 |
| Oil and grease | 1.34 | 0.446 |
| TSS | 0.67 | 0.536 |
| pH | (1) | (1) |
1Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.77 | 0.42 | 0.0076 |
| Lead (T) | 0.53 | 0.26 | 0.0067 |
| Zinc (T) | 0.76 | 0.29 | 0.008 |
| Oil and grease | 30 | 10 | 0.223 |
| TSS | 15 | 12 | 0.116 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (5.34/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) Die 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) | 0.0066 | 0.0036 |
| Lead (T) | 0.0046 | 0.0022 |
| Zinc (T) | 0.0066 | 0.0025 |
| Total phenols | 0.0074 | 0.0026 |
| Oil and grease | 0.259 | 0.0864 |
| TSS | 0.13 | 0.104 |
| pH | (1) | (1) |
1Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.77 | 0.42 | 0.0015 |
| Lead (T) | 0.53 | 0.26 | 0.0013 |
| Zinc (T) | 0.76 | 0.29 | 0.0016 |
| Total phenols | 0.86 | 0.3 | 0.0017 |
| Oil and grease | 30 | 10 | 0.0432 |
| TSS | 15 | 12 | 0.0225 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (1.04/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) Melting Furnace Scrubber Operations.
NSPS
| 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) | 1.56 | 0.852 |
| Lead (T) | 1.07 | 0.527 |
| Zinc (T) | 1.54 | 0.588 |
| Total phenols | 1.74 | 0.608 |
| Oil and grease | 60.8 | 20.3 |
| TSS | 30.4 | 24.3 |
| pH | (1) | (1) |
1Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.77 | 0.42 | 0.345 |
| Lead (T) | 0.53 | 0.26 | 0.304 |
| Zinc (T) | 0.76 | 0.29 | 0.365 |
| Total phenols | 0.86 | 0.3 | 0.406 |
| Oil and grease | 30 | 10 | 10.1 |
| TSS | 15 | 12 | 5.27 |
| pH | (3) | (3) | (3) |
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 SCF of air scrubbed) for a specific plant.
3Within the range of 7.0 to 10.0 at all times.
(d) 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) | 0.304 | 0.166 |
| Lead (T) | 0.209 | 0.103 |
| Zinc (T) | 0.3 | 0.114 |
| Oil and grease | 11.8 | 3.94 |
| TSS | 5.91 | 4.73 |
| pH | (1) | (1) |
1Within the range of 7.0 to 10.0 at all times.
| Maximum for any 1 day | Maximum for monthly average | Annual average1 | |
|---|---|---|---|
| (mg/l)2 | (mg/l)2 | ||
| Copper (T) | 0.77 | 0.42 | 0.067 |
| Lead (T) | 0.53 | 0.26 | 0.0591 |
| Zinc (T) | 0.76 | 0.29 | 0.071 |
| Oil and grease | 30 | 10 | 1.97 |
| TSS | 15 | 12 | 1.03 |
| pH | (3) | (3) | (3) |
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.
3Within the range of 7.0 to 10.0 at all times.
[50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]
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