40 CFR 424.33: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

The following limitations establish the quantity or quality of pollutants or pollutant properties, controlled by this section, which may be discharged by a point source subject to the provisions of this subpart after application of the best available technology economically achievable:

Effluent characteristic Effluent limitations

Maximum for any 1 day Average of daily values for 30 consecutive days shall not exceed—

Metric units (kg/kkg processed)

Chromium total 0.0054 0.0027

Manganese total .054 .027

English units (lb/ton of raw material)

Chromium total .011 .0054

Manganese total .108 .054