View all text of Subpart B [§ 425.20 - § 425.26]

§ 425.21 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available (BPT).

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 practicable control technology currently available (BPT):

Pollutant or pollutant property BPT limitations Maximum for any 1 day Maximum for monthly average Kg/kkg (or pound per 1,000 lb) of raw material BOD58.23.7 TSS11.85.4 Oil and grease3.41.5 Total chromium0.210.08 pH( 1)( 1)

1 Within the range 6.0 to 9.0.