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

  1. Law
  2. CFR 40
  3. Protection of Environment
  4. Environmental Protection Agency
  5. Effluent Guidelines and Standards
  6. The Centralized Waste Treatment Point Source Category
  7. Oils Treatment and Recovery
  8. Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

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§ 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:

Expand Table

BPT Limitations

Regulated
parameter 		Maximum daily1 Maximum monthly avg.1
Conventional Parameters
O&G 127 38.0
pH (2) (2)
TSS 74.1 30.6
Metal Parameters
Arsenic 2.95 1.33
Cadmium 0.0172 0.0102
Chromium 0.746 0.323
Cobalt 56.4 18.8
Copper 0.500 0.242
Lead 0.350 0.160
Mercury 0.0172 0.00647
Tin 0.335 0.165
Zinc 8.26 4.50
Organic Parameters
Bis(2-ethylhexyl) phthalate 0.215 0.101
Butylbenzyl phthalate 0.188 0.0887
Carbazole 0.598 0.276
n-Decane 0.948 0.437
Fluoranthene 0.0537 0.0268
n-Octadecane 0.589 0.302

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]


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