40 C.F.R. § 437.21

Current through September 30, 2024
Section 437.21 - 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 § 437.20(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 daily1 Maximum monthly avg.1
Conventional Parameters
O&G12738.0
pH(2)(2)
TSS74.130.6
Metal Parameters
Arsenic2.951.33
Cadmium0.01720.0102
Chromium0.7460.323
Cobalt56.418.8
Copper0.5000.242
Lead0.3500.160
Mercury0.01720.00647
Tin0.3350.165
Zinc8.264.50
Organic Parameters
Bis(2-ethylhexyl) phthalate0.2150.101
Butylbenzyl phthalate0.1880.0887
Carbazole0.5980.276
n-Decane0.9480.437
Fluoranthene0.05370.0268
n-Octadecane0.5890.302

1 mg/L (ppm).

2 Within the range 6 to 9.

40 C.F.R. §437.21

65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, Dec. 22, 2003