40 C.F.R. § 437.42

Current through September 30, 2024

Section 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 daily1	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 daily1	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 daily1	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 daily1	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 daily1	Maximum monthly avg.1
Conventional Parameters
BOD5	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 daily1	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 daily1	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.

40 C.F.R. §437.42

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