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§ 471.83 New source performance standards (NSPS).
Any new source subject to this subpart must achieve the following new source performance standards (NSPS):
(a) Rolling spent neat oils—subpart H—NSPS. There shall be no discharge of process wastewater pollutants.
(b) Rolling spent emulsions.
Subpart H—NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of zinc rolled with emulsions | ||
| Chromium | 0.0005 | 0.0002 |
| Copper | 0.002 | 0.0009 |
| Cyanide | 0.0003 | 0.0001 |
| Zinc | 0.002 | 0.0006 |
| Oil and grease | 0.014 | 0.014 |
| TSS | 0.021 | 0.017 |
| pH | ( 1) | ( 1) |
1 Within the range of 7.5 to 10.0 at all times.
(c) Rolling contact cooling water.
Subpart H—NSPS
| Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
|---|---|---|
| mg/off-kg (pounds per million off-pounds) of zinc rolled with contact cooling water | ||
| Chromium | 0.020 | 0.009 |
| Copper | 0.069 | 0.037 |
| Cyanide | 0.011 | 0.004 |
| Zinc | 0.055 | 0.023 |
| Oil and grease | 0.536 | 0.536 |
| TSS | 0.804 | 0.643 |
| pH | ( 1) | ( 1) |