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§ 420.104 New source performance standards (NSPS).
The discharge of wastewater pollutants from any new source subject to this subpart shall not exceed the standards set forth below.
(a) Cold rolling mills—(1) Recirculation—single stand.
Subpart J
Pollutant or pollutant property | New source performance standards | |
---|---|---|
Maximum for any 1 day | Average of daily values for 30 consecutive days | |
Kg/kkg (pounds per 1,000 lb) of product | ||
TSS | 0.00125 | 0.000626 |
O&G | 0.000522 | 0.000209 |
Chromium 1 | 0.0000209 | 0.0000084 |
Lead | 0.0000094 | 0.0000031 |
Nickel 1 | 0.0000188 | 0.0000063 |
Zinc | 0.0000063 | 0.0000021 |
Naphthalene | 0.0000021 | |
Tetrachloroethylene | 0.0000031 | |
pH | ( 2) | ( 2) |
1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are cotreated with descaling or combination acid pickling wastewaters.
2 Within the range of 6.0 to 9.0.
(2) Recirculation—multiple stands.
Subpart J
Pollutant or pollutant property | New source performance standards | |
---|---|---|
Maximum for any 1 day | Average of daily values for 30 consecutive days | |
Kg/kkg (pounds per 1,000 lb) of product | ||
TSS | 0.00250 | 0.00125 |
O&G | 0.00104 | 0.000417 |
Chromium 1 | 0.0000418 | 0.0000167 |
Lead | 0.0000188 | 0.0000063 |
Nickel 1 | 0.0000376 | 0.0000125 |
Zinc | 0.0000125 | 0.0000042 |
Naphthalene | 0.0000042 | |
Tetrachloroethylene | 0.0000063 | |
pH | ( 2) | ( 2) |