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

Regulations
title 40
chapter I-i31
part 437
subpart B
§ 437.21

View all text of Subpart B [§ 437.20 - § 437.26]

§ 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 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.

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