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 Cleaning 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) | 0.0771 | 0.0421 |
| Lead (T) | 0.0791 | 0.039 |
| Zinc (T) | 0.114 | 0.0431 |
| Oil and grease | 3.0 | 1.0 |
| TSS | 3.8 | 1.5 |
| 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 | 0.017 |
| Lead (T) | 0.79 | 0.39 | 0.022 |
| Zinc (T) | 1.14 | 0.43 | 0.027 |
| Oil and grease | 30 | 10 | 0.501 |
| TSS | 38 | 15 | 1.0 |
| pH | (3) | (3) | (3) |
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.
3Within the range of 7.0 to 10.0 at all times.
(b) 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) | 0.0093 | 0.0051 |
| Lead (T) | 0.0096 | 0.0047 |
| Zinc (T) | 0.0138 | 0.0052 |
| Oil and grease | 0.363 | 0.121 |
| TSS | 0.46 | 0.182 |
| 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 | 0.0021 |
| Lead (T) | 0.79 | 0.39 | 0.0027 |
| Zinc (T) | 1.14 | 0.43 | 0.0033 |
| Oil and grease | 30 | 10 | 0.0605 |
| TSS | 38 | 15 | 0.121 |
| pH | (3) | (3) | (3) |
1kg/1,000 kkg (pounds per million pounds) of metal poured.
2These concentrations must be multiplied by the ratio of (1.45/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) Die Casting Operations.
NSPS
| Pollutant or pollutant property | Maximum for one 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) | 0.0068 | 0.0034 |
| Zinc (T) | 0.0098 | 0.0037 |
| Total Phenols | 0.0074 | 0.0026 |
| Oil and grease | 0.259 | 0.0864 |
| TSS and | 0.33 | 0.13 |
| 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) | 0.79 | 0.39 | 0.0019 |
| Zinc (T) | 1.14 | 0.43 | 0.0023 |
| Total phenols | 0.86 | 0.3 | 0.0017 |
| Oil and grease | 30 | 10 | 0.0432 |
| TSS and | 38 | 15 | 0.0864 |
| 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)
3Within the range of 7.0 to 10.0 at all times.
(d) Dust Collection Scrubber Operations.
NSPS
| Pollutant of pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| kg/62.3 million Sm3 (pounds per billion SCF) of air scrubbed | ||
| Cooper (T) | 0.231 | 0.126 |
| Lead (T) | 0.237 | 0.117 |
| Zinc (T) | 0.343 | 0.129 |
| Total phenols | 0.258 | 0.09 |
| Oil and grease | 9.01 | 3.0 |
| TSS | 11.4 | 4.51 |
| 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 | ||
| Cooper (T) | 0.77 | 0.42 | 0.0511 |
| Lead (T) | 0.79 | 0.39 | 0.0661 |
| Zinc (T) | 1.14 | 0.43 | 0.0811 |
| Total phenols | 0.86 | 0.3 | 0.0601 |
| Oil and grease | 30 | 10 | 1.5 |
| TSS | 38 | 15 | 3.0 |
| 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 (0.036/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.
(e) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.
(f) Investment Casting.
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) | 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) |
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 | 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) |
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.
3Within the range of 7.0 to 10.0 at all times.
(g) 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) | 3.01 | 1.64 |
| Lead (T) | 3.09 | 1.52 |
| Zinc (T) | 4.45 | 1.68 |
| Total phenols | 3.36 | 1.17 |
| Oil and grease | 117 | 39.1 |
| TSS | 148 | 58.6 |
| 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 | 0.664 |
| Lead (T) | 0.79 | 0.39 | 0.859 |
| Zinc (T) | 1.14 | 0.43 | 1.05 |
| Total phenols | 0.86 | 0.3 | 0.781 |
| Oil and grease | 30 | 10 | 19.5 |
| TSS | 38 | 15 | 39.1 |
| 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 (0.468/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.
(h) 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) | 0.297 | 0.162 |
| Lead (T) | 0.305 | 0.151 |
| Zinc (T) | 0.44 | 0.166 |
| Oil and grease | 11.6 | 3.86 |
| TSS | 14.7 | 5.79 |
| 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 | 0.0656 |
| Lead (T) | 0.79 | 0.39 | 0.0849 |
| Zinc (T) | 1.14 | 0.43 | 0.104 |
| Oil and grease | 30 | 10 | 1.93 |
| TSS | 38 | 15 | 3.86 |
| pH | (3) | (3) | (3) |
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.
3Within the range of 7.0 to 10.0 at all times.
[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]
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