§ 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 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) |