40 CFR 467.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

View all text of Subpart B [§ 467.20 - § 467.27]

§ 467.22 - Effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Except as provided in 40 CFR 125.30 through 125.32, any existing point source subject to this subpart must achieve the following effluent limitations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available.

Subpart B Core

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions		Chromium	0.057	0.024	Cyanide	0.038	0.016	Zinc	0.19	0.079	Aluminum	0.84	0.416	Oil and grease	2.60	1.56	Suspended solids	5.33	2.53	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

Subpart B Direct Chill Casting Contact Cooling Water

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum cast		Chromium	0.59	0.24	Cyanide	0.39	0.16	Zinc	1.94	0.81	Aluminum	8.55	4.26	Oil and grease	26.58	15.95	Suspended solids	54.49	25.92	pH	( 1)	( 1)

1 The pH shall be maintained within the range of 7.0 to 10.0 at all times except for those situations when this waste stream is discharged separately and without commingling with any other wastewater in which case the pH shall be within the range of 6.0 to 10.0 at all times.

Subpart B Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum quenched		Chromium	3.39	1.39	Cyanide	2.24	0.93	Zinc	11.25	4.70	Aluminum	49.55	24.66	Oil and grease	154.10	92.46	Suspended solids	315.91	150.25	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

Subpart B Cleaning or Etching Bath

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched		Chromium	0.079	0.032	Cyanide	0.052	0.022	Zinc	0.262	0.109	Aluminum	1.15	0.573	Oil and grease	3.58	2.15	Suspended solids	7.34	3.49	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

Subpart B Cleaning or Etching Rinse

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched		Chromium	6.12	2.51	Cyanide	4.04	1.67	Zinc	20.31	8.49	Aluminum	89.46	44.52	Oil and grease	278.24	166.95	Suspended solids	570.39	271.29	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

Subpart B Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property	BPT effluent limitations		Maximum for any 1 day	Maximum for monthly average		mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched		Chromium	7.00	2.86	Cyanide	4.61	1.91	Zinc	23.22	9.70	Aluminum	102.24	50.88	Oil and grease	318.00	190.80	Suspended solids	651.90	310.05	pH	( 1)	( 1)

1 Within the range of 7.0 to 10.0 at all times.

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]

AUTHORITY: Secs. 301, 304(b), (c), (e), and (g), 306(b) and (c), 307(b) and (c), 308 and 501 of the Clean Water Act (the Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) and the Water Quality Act of 1987 (the “Act”); 33 U.S.C. 1311, 1314(b), (c), (e), and (g), 1316(b) and (c), 1317(b) and (c), 1318 and 1361; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217; 101 Stat. 7, Pub. L. 100-4.

SOURCE: 48 FR 49149, Oct. 24, 1983, unless otherwise noted.

CITE AS: 40 CFR 467.22