View all text of Subpart L [§ 420.120 - § 420.127]
§ 420.125 - Pretreatment standards for existing sources (PSES).
Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources.
(a) Galvanizing, terne coating and other coatings—(1) Strip, sheet, and miscellaneous products.
Subpart L
| Pretreatment standards for existing sources | Pollutant or pollutant property | Maximum for any 1 day | Average of daily values for 30 consecutive days | Kg/kkg (pounds per 1,000 lb) of product | Lead | 0.00113 | 0.000376 | Zinc | 0.00150 | 0.000500 | Chromium (hexavalent) 1 | 0.000150 | 0.0000501 |
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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) [Reserved]
(b) Galvanizing and other coatings—(1) Wire products and fasteners.
Subpart L
| Pollutant or pollutant property | Pretreatment standards for existing sources | Maximum for any 1 day | Average of daily values for 30 consecutive days | kg/kkg (pounds per 1,000 lb) of product | Lead | 0.00451 | 0.00150 | Zinc | 0.00601 | 0.00200 | Chromium (hexavalent) 1 | 0.000601 | 0.000200 |
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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) [Reserved]
(c) Fume scrubbers.
Subpart L
| Pollutant or pollutant property | Pretreatment standards for existing sources | Maximum for any 1 day | Average of daily values for 30 consecutive days | Kg per day | Lead | 0.0368 | 0.0123 | Zinc | 0.0491 | 0.0164 | Chromium (hexavalent) 1 | 0.00490 | 0.00163 |
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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.