Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT).

§ 420.103 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) Cold rolling mills—(1) Recirculation—single stand.

Subpart J

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
Chromium 10.00002090.0000084
Lead0.00000940.0000031
Nickel 10.00001880.0000063
Zinc0.00000630.0000021
Naphthalene0.0000021
Tetrachloroethylene0.0000031

1 The limitations for chromium and nickel shall be applicable in lieu of those for lead and zinc when cold rolling wastewaters are treated with descaling or combination acid pickling wastewaters.

(2) Recirculation—multiple stands.

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