40 CFR 426.62: Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Except as provided in §§ 125.30 through 125.32, any existing point source subject to this subpart shall achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT):

Effluent characteristic Effluent limitations

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

Metric units (q/sq m of product)

TSS 1.95 1.22

Oil 0.64 .64

pH (1) (1)

English units (lb/1,060 sq ft of product)

TSS 0.40 0.25

Oil 0.13 .13

pH (1) (1)

1 Within the range 6.0 to 9.0.