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 or § 437.30(b), any existing point source subject to this subpart must achieve the following effluent limitations representing the application of BPT: BPT Limitations Regulated parameter Maximum daily 1 Maximum monthly avg. 1 Conventional Parameters BOD 5 163 53.0 pH ( 2 ) ( 2 ) TSS 216 61.3 Metal Parameters Copper 0.865 0.757 Zinc 0.497 0.420 Organic Parameters Acetone 30.2 7.97 Acetophenone 0.114 0.0562 2-Butanone 4.81 1.85 o-Cresol 1.92 0.561 p-Cresol 0.698 0.205 Phenol 3.65 1.08 Pyridine 0.370 0.182 2,4,6-Trichlorophenol 0.155 0.106 1 mg/L (ppm). 2 Within the range 6 to 9. [65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003]