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 propertyBAT effluent limitations
Maximum for any 1 dayAverage of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.001130.000376
Zinc0.001500.000500
Chromium (hexavalent) 10.0001500.0000501

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 propertyBAT effluent limitations
Maximum for any 1 dayAverage of daily values for 30 consecutive days
Kg/kkg (pounds per 1,000 lb) of product
Lead0.004510.00150
Zinc0.006010.00200
Chromium (hexavalent) 10.0006010.000200

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 propertyBAT effluent limitations
Maximum for any 1 dayAverage of daily values for 30 consecutive days
Kg per day
Lead0.03680.0123
Zinc0.04910.0164
Chromium (hexavalent) 10.004900.00163

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]
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