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Title 40

Displaying title 40, up to date as of 9/04/2026. Title 40 was last amended 9/04/2026.
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Subpart B—Rolling With Emulsions Subcategory

§ 467.20 Applicability; description of the rolling with emulsions subcategory.

This subpart applies to dischargers of pollutants to waters of the United States and introductions of pollutants into publicly owned treatment works from the core and the ancillary operations of the rolling with emulsions subcategory.

§ 467.21 Specialized definitions.

For the purpose of this subpart:

(a) The “core” of the rolling with emulsions subcategory shall include rolling using emulsions, roll grinding, stationary casting, homogenizing, artificial aging, annealing, and sawing.

(b) The term “ancillary operation” shall mean any operation not previously included in the core, performed on-site, following or preceding the rolling operation. The ancillary operations shall include direct chill casting, solution heat treatment, cleaning or etching, and degassing.

§ 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]

§ 467.23 Effluent limitations representing the degree of effluent reduction attainable by the application of the best available technology economically achievable.

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 available technology economically achievable. The discharge of process wastewater pollutants from the core shall not exceed the values set forth below:

Subpart B

Core

Pollutant or pollutant property BAT 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 0.42

Subpart B

Direct Chill Casting Contact Cooling Water

Pollutant or pollutant property BAT 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

Subpart B

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property BAT Effluent Limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium 0.90 0.37
Cyanide 0.59 0.25
Zinc 2.98 1.25
Aluminum 13.10 6.52

Subpart B

Cleaning or Etching Bath

Pollutant or pollutant property BAT 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 0.26 0.109
Aluminum 1.15 0.573

Subpart B

Cleaning or Etching Rinse

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.61 0.25
Cyanide 0.41 0.17
Zinc 2.03 0.85
Aluminum 8.95 4.45

Subpart B

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property BAT effluent limitations
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.85 0.35
Cyanide 0.56 0.23
Zinc 2.82 1.18
Aluminum 12.43 6.19

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11633, Mar. 27, 1984]

§ 467.24 New source performance standards.

Any new source subject to this subpart must achieve the following performance standards. The discharge of process wastewater pollutants from the core shall not exceed the values set forth below:

Subpart B

Core

Pollutant or pollutant property NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions
Chromium 0.048 0.020
Cyanide 0.026 0.011
Zinc 0.133 0.055
Aluminum 0.80 0.35
Oil and grease 1.30 1.30
Suspended solids 1.95 1.56
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 NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods
Chromium 0.49 0.20
Cyanide 0.27 0.11
Zinc 1.36 0.56
Aluminum 8.12 3.60
Oil and grease 13.29 13.29
Suspended solids 19.94 15.95
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 NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium 0.76 0.31
Cyanide 0.41 0.17
Zinc 2.08 0.86
Aluminum 12.45 5.52
Oil and grease 20.37 20.37
Suspended solids 30.56 24.45
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 NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.067 0.027
Cyanide 0.036 0.015
Zinc 0.183 0.075
Aluminum 1.094 0.485
Oil and grease 1.79 1.79
Suspended solids 2.69 2.15
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 NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.52 0.21
Cyanide 0.28 0.11
Zinc 1.42 0.59
Aluminum 8.50 3.77
Oil and grease 13.91 13.91
Suspended solids 20.87 16.70
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 NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.72 0.29
Cyanide 0.39 0.16
Zinc 1.97 0.81
Aluminum 11.81 5.24
Oil and grease 19.33 19.33
Suspended solids 29.00 23.20
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, 11633, Mar. 27, 1984, as amended at 53 FR 52370, Dec. 27, 1988]

§ 467.25 Pretreatment standards for existing sources.

Except as provided in 40 CFR 403.7 and 403.13, any existing source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for existing sources. The mass of wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the following values:

Subpart B

Core

Pollutant or pollutant property PSES
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 0.190 0.079
TTO 0.090
Oil and grease (alternate monitoring parameter) 6.8 3.4

Subpart B

Direct Chill Casting Contact Cooling Water

Pollutant or pollutant property PSES
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast by semi-continuous methods
Chromium 0.59 0.24
Cyanide 0.39 0.16
Zinc 1.94 0.81
TTO 0.92
Oil and grease (alternate monitoring parameter) 69 35

Subpart B

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property PSES
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium 0.90 0.37
Cyanide 0.59 0.25
Zinc 2.98 1.25
TTO 1.41
Oil and grease (alternate monitoring parameter) 110 53

Subpart B

Cleaning or Etching Bath

Pollutant or pollutant property PSES
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
TTO 0.124
Oil and grease (alternate monitoring parameter) 9.3 4.7

Subpart B

Cleaning or Etching Rinse

Pollutant or pollutant property PSES
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.61 0.25
Cyanide 0.41 0.17
Zinc 2.03 0.85
TTO 0.96
Oil and grease (alternate monitoring parameter) 73 36

Subpart B

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property PSES
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.85 0.35
Cyanide 0.56 0.23
Zinc 2.83 1.18
TTO 1.34
Oil and grease (alternate monitoring parameter) 100 50

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, 11633, Mar. 27, 1984, as amended at 53 FR 52369, 52370, Dec. 27, 1988]

§ 467.26 Pretreatment standards for new sources.

Except as provided in § 403.7, any new source subject to this subpart which introduces pollutants into a publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources. The mass of process wastewater pollutants from the core and ancillary operations introduced into a POTW shall not exceed the values set forth below:

Subpart B

Core

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum rolled with emulsions
Chromium 0.048 0.020
Cyanide 0.026 0.011
Zinc 0.133 0.055
TTO 0.090
Oil and grease (alternate monitoring parameter) 1.30 1.30

Subpart B

Direct Chill Casting Contact Cooling Water

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast by semicontinuous methods
Chromium 0.49 0.20
Cyanide 0.27 0.11
Zinc 1.36 0.56
TTO 0.92
Oil and grease (alternate monitoring parameter) 13.29 13.29

Subpart B

Solution Heat Treatment Contact Cooling Water

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum quenched
Chromium 0.76 0.31
Cyanide 0.41 0.17
Zinc 2.08 0.86
TTO 1.41
Oil and grease (alternate monitoring parameter) 20.37 20.37

Subpart B

Cleaning or Etching Bath

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.067 0.027
Cyanide 0.036 0.015
Zinc 0.183 0.075
TTO 0.124
Oil and grease (alternate monitoring parameter) 1.79 1.79

Subpart B

Cleaning or Etching Rinse

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.52 0.21
Cyanide 0.28 0.11
Zinc 1.42 0.59
TTO 0.96
Oil and grease (alternate monitoring parameter) 13.91 13.91

Subpart B

Cleaning or Etching Scrubber Liquor

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cleaned or etched
Chromium 0.72 0.29
Cyanide 0.39 0.16
Zinc 1.97 0.81
TTO 1.34
Oil and grease (alternate monitoring parameter) 19.33 19.33

[48 FR 49149, Oct. 24, 1983; 49 FR 11631, 11632, Mar. 27, 1984]

§ 467.27 Effluent limitations representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. [Reserved]