40 CFR 437.11 - Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

View all text of Subpart A [§ 437.10 - § 437.16]

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

(a) Except as provided in 40 CFR 125.30 through 125.32 or § 437.10(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	205	50.2	pH	( 2)	( 2)	TSS	60.0	31.0	Metal Parameters			Antimony	0.249	0.206	Arsenic	0.162	0.104	Cadmium	0.474	0.0962	Chromium	15.5	3.07	Cobalt	0.192	0.124	Copper	4.14	1.06	Lead	1.32	0.283	Mercury	0.00234	0.000739	Nickel	3.95	1.45	Silver	0.120	0.0351	Tin	0.409	0.120	Titanium	0.0947	0.0618	Vanadium	0.218	0.0662	Zinc	2.87	0.641

1 mg/L (ppm).

2 Within the range 6 to 9.

(b) The following in-plant limitations apply to metal-bearing wastewater containing cyanide:

In-Plant Limitations

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1	Cyanide	500	178

1 mg/L (ppm).

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