Title 40
SECTION 420.123
420.123 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).
§ 420.123 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.
(a) Galvanizing, terne coating and other coatings - (1) Strip, sheet, and miscellaneous products scrubbers.
Subpart L
| Pollutant or pollutant property | BAT effluent limitations | |
|---|---|---|
| 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 wastewater from the chromate rinse step.
(2) [Reserved]
(b) Galvanizing and other coatings - (1) Wire products and fasteners.
Subpart L
| Pollutant or pollutant property | BAT effluent limitations | |
|---|---|---|
| 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 | BAT effluent limitations | |
|---|---|---|
| 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.