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

Regulations last checked for updates: Oct 18, 2024

Title 40 - Protection of Environment last revised: Oct 16, 2024

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
Pollutant or pollutant property	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
Pollutant or pollutant property	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
Pollutant or pollutant property	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
Pollutant or pollutant property	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
Pollutant or pollutant property	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
Pollutant or pollutant property	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]

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

cite as: 40 CFR 467.22

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