View all text of Subpart L [§ 420.120 - § 420.127]
§ 420.124 - 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) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
| 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 | 0.0438 | 0.0188 | O&G | 0.0188 | 0.00626 | Lead | 0.000282 | 0.0000939 | Zinc | 0.000376 | 0.000125 | Chromium (hexavalent) 1 | 0.0000376 | 0.0000125 | pH | ( 2) | ( 2) |
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1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.
2 Within the range of 6.0 to 9.0.
(2) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
| 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 | 0.175 | 0.0751 | O&G | 0.0751 | 0.0250 | Lead | 0.00113 | 0.000376 | Zinc | 0.00150 | 0.000500 | Chromium (hexavalent) 1 | 0.000150 | 0.0000501 | pH | ( 1) | ( 1) |
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1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.
2 Within the range of 6.0 to 9.0.
(2) [Reserved]
(c) Fume scrubbers.
Subpart L
| New source performance standards | Pollutant or pollutant property | Maximum for any 1 day | Average of daily values for 30 consecutive days | kg/per day | TSS | 5.72 | 2.45 | O&G | 2.45 | 0.819 | Lead | 0.0368 | 0.0123 | Zinc | 0.0491 | 0.0164 | Chromium (hexavalent) 1 | 0.00490 | 0.00163 | pH | ( 2) | ( 2) |
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1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.
2 Within the range of 6.0 to 9.0.