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

Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable (BAT). (1) For existing point sources whose total OCPSF production defined by s. NR 235.02 is less than or equal to 5 million pounds of OCPSF products per year, the BAT level of treatment shall be the same as the BPT level of treatment. (2) Except as provided in sub. (1) and in 40 CFR 125.30 to 125.32 , any existing point source that uses end-of-pipe biological treatment and is subject to this subchapter shall achieve discharges in accordance with s. NR 235.81 . (3) Except as provided in sub. (1) and in 40 CFR 125.30 to 125.32 , any existing point source that does not use end-of-pipe biological treatment and is subject to this subchapter shall achieve discharges in accordance with s. NR 235.91 .