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. The above limitations shall be applicable to each fume scrubber associated with any of the coating operations specified above. [47 FR 23284, May 27, 1982, as amended at 49 FR 21036, May 17, 1984]