40 CFR 439.42 - Effluent limitations 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 application of BPT:
(a) The limitation for BOD5 is the same as specified in § 439.12(a). No facility shall be required to attain a monthly average limitation for BOD5 that is less than the equivalent of 45 mg/L.
(b) The limitation for TSS is the same as specified in § 439.12(b).
(c) The limitations for COD are the same as specified in § 439.22(c) and (d).