Federal regulations · Through 2026-08-25 · Newer source version available

40 CFR 437.21: Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

Where this section sits in the code

Title 40—Protection of Environment
CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY
SUBCHAPTER N—EFFLUENT GUIDELINES AND STANDARDS
PART 437—THE CENTRALIZED WASTE TREATMENT POINT SOURCE CATEGORY
Subpart B—Oils Treatment and Recovery

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 daily 1 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.

Collected 2026-08-27T02:26:04Z. Source file · JSON

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