40 CFR 437.42 - Effluent limitations attainable by the application of the best practicable control technology currently available (BPT).

View all text of Subpart D [§ 437.40 - § 437.47]

§ 437.42 - 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 § 437.40(b), any existing facility subject to this subpart which combines treated or untreated wastes from subparts A, B, or C of this part may be subject to Multiple Wastestream Subcategory effluent limitations representing the application of BPT set forth in paragraphs (b), (c), (d), or (e) of this section if the discharger agrees to the following conditions in its NPDES permit:

(1) The discharger will meet the applicable Multiple Wastestream Subcategory limitations set forth in (b), (c), (d) or (e);

(2) The discharger will notify its NPDES permit writer at the time of renewal or modification of its permit, of its desire to be subject to the Multiple Waste Subcategory by submitting to the NPDES permit writer an initial certification statement as described in § 437.41(a);

(3) The discharger will submit to its NPDES permitting authority a periodic certification statement as described in § 437.41(b) once a year; and

(4) The discharger will maintain at the office of the facility and make available for inspection the on-site compliance paperwork as described in § 437.41(c).

(b) Combined waste receipts from subparts A, B, and C of this part. (1) As provided in § 437.42(a), any existing point source subject to this paragraph must achieve the following effluent limitations representing the application of BPT:

BPT Limitations

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1	Conventional Parameters			BOD5	163	53.0	O&G	127	38.0	pH	( 2)	( 2)	TSS	74.1	30.6	Metal Parameters			Antimony	0.249	0.206	Arsenic	0.162	0.104	Cadmium	0.0172	0.0102	Chromium	0.746	0.323	Cobalt	0.192	0.124	Copper	0.500	0.242	Lead	0.350	0.160	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	0.497	0.420	Organic Parameters			Acetone	30.2	7.97	Acetophenone	0.114	0.0562	Bis(2-ethylhexyl) phthalate	0.215	0.101	2-Butanone	4.81	1.85	Butylbenzyl phthalate	0.188	0.0887	Carbazole	0.598	0.276	o-Cresol	1.92	0.561	p-Cresol	0.698	0.205	n-Decane	0.948	0.437	Fluoranthene	0.0537	0.0268	n-Octadecane	0.589	0.302	Phenol	3.65	1.08	Pyridine	0.370	0.182	2,4,6-Trichlorophenol	0.155	0.106

1 mg/L (ppm).

2 OSC Within the range 6 to 9.

(2) 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).

(c) Combined waste receipts from subparts A and B of this part. (1) As provided in § 437.42(a), any existing point source subject to this paragraph 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			Antimony	0.249	0.206	Arsenic	0.162	0.104	Cadmium	0.0172	0.0102	Chromium	0.746	0.323	Cobalt	0.192	0.124	Copper	0.500	0.242	Lead	0.350	0.160	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	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.

(2) 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).

(d) Combined waste receipts from subparts A and C of this part. (1) As provided in § 437.42(a), any existing point source subject to this paragraph must achieve the following effluent limitations representing the application of BPT:

BPT Limitations

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1	Conventional Parameters			BOD 5	163	53.0	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	0.865	0.757	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	0.497	0.420	Organic Parameters			Acetone	30.2	7.97	Acetophenone	0.114	0.0562	2-Butanone	4.81	1.85	o-Cresol	1.92	0.561	p-Cresol	0.698	0.205	Phenol	3.65	1.08	Pyridine	0.370	0.182	2,4,6-Trichlorophenol	0.155	0.106

1 mg/L (ppm).

2 Within the range 6 to 9.

(2) 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).

(e) Combined waste receipts from subparts B and C of this part. As provided in § 437.42(a), any existing point source subject to this paragraph must achieve the following effluent limitations representing the application of BPT:

BPT Limitations

Regulated parameter	Maximum daily 1	Maximum monthly avg. 1	Conventional Parameters			BOD5	163	53.0	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	0.497	0.420	Organic Parameters			Acetone	30.2	7.97	Acetophenone	0.114	0.0562	Bis(2-ethylhexyl) phthalate	0.215	0.101	2-Butanone	4.81	1.85	Butylbenzyl phthalate	0.188	0.0887	Carbazole	0.598	0.276	o-Cresol	1.92	0.561	p-Cresol	0.698	0.205	n-Decane	0.948	0.437	Fluoranthene	0.0537	0.0268	n-Octadecane	0.589	0.302	Phenol	3.65	1.08	Pyridine	0.370	0.182	2,4,6-Trichlorophenol	0.155	0.106

1 mg/L (ppm).

2 Within the range 6 to 9.

[65 FR 81300, Dec. 22, 2000, as amended at 68 FR 71023, 71024, Dec. 22, 2003]