Title 40
SECTION 420.125
420.125 Pretreatment standards for existing sources (PSES).
§ 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 |
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 |
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 |
1 The limitations for hexavalent chromium shall be applicable only to galvanizing operations which discharge wastewaters from the chromate rinse step.