40 CFR § 437.31 - Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

§ 437.31 Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

Except as provided in40 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
BOD5 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]