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Title 40

Displaying title 40, up to date as of 9/11/2026. Title 40 was last amended 9/09/2026.
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Subpart A—Rolling With Neat Oils Subcategory

§ 467.10 Applicability; description of the rolling with neat oils subcategory.

This subpart applies to discharges 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 neat oils subcategory.

§ 467.11 Specialized definitions.

For the purpose of this subpart:

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

(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 continuous rod casting, continuous sheet casting, solution heat treatment, cleaning or etching.

§ 467.12 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 for the core operation and for the ancillary operations representing the degree of effluent reduction attainable by the application of the best practicable control technology currently available:

Subpart A

Core With an Annealing Furnace Scrubber

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 neat oils
Chromium 0.0360 0.0147
Cyanide 0.0237 0.0098
Zinc 0.119 0.0498
Aluminum 0.525 0.257
Oil and grease 1.634 0.980
Suspended solids 3.348 1.593
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

Core Without an Annealing Furnace Scrubber

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 neat oils
Chromium 0.0244 0.010
Cyanide 0.0161 0.0067
Zinc 0.0808 0.0338
Aluminum 0.356 0.174
Oil and grease 1.11 0.664
Suspended solids 2.27 1.079
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

Continuous Sheet Casting Spent Lubricant

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 sheet cast by continuous methods
Chromium 0.00086 0.00035
Cyanide 0.00057 0.00024
Zinc 0.0029 0.0012
Aluminum 0.0127 0.0063
Oil and grease 0.0393 0.0236
Suspended solids 0.0805 0.0383
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

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 at all times.

Subpart A

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 0.110
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 at all times.

Subpart A

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 at all times.

Subpart A

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 at all times.

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

§ 467.13 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 mass of pollutants in the core and ancillary operations' process wastewater shall not exceed the following values:

Subpart A

Core With an Annealing Furnace Scrubber

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 neat oils
Chromium 0.036 0.015
Cyanide 0.024 0.0098
Zinc 0.119 0.050
Aluminum 0.525 0.257

Subpart A

Core Without an Annealing Furnace Scrubber

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 neat oils
Chromium 0.025 0.010
Cyanide 0.016 0.0067
Zinc 0.081 0.034
Aluminum 0.356 0.174

Subpart A

Continuous Sheet Casting Spent Lubricant

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 sheet cast
Chromium 0.00086 0.00035
Cyanide 0.00057 0.00024
Zinc 0.00287 0.0012
Aluminum 0.0127 0.0062

Subpart A

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 0.897 0.367
Cyanide 0.591 0.245
Zinc 2.974 1.243
Aluminum 13.10 6.518

Subpart A

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 0.262 0.109
Aluminum 1.151 0.573

Subpart A

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 0.612 0.251
Cyanide 0.404 0.167
Zinc 2.031 0.849
Aluminum 8.944 4.45

Subpart A

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 0.851 0.348
Cyanide 0.561 0.232
Zinc 2.822 1.179
Aluminum 12.43 6.186

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

§ 467.14 New source performance standards.

Any new source subject to this subpart must achieve the following performance standards. The mass of pollutants in the core and ancillary operations' process wastewater shall not exceed the following values:

Subpart A

Core With an Annealing Furnace Scrubber

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 neat oils
Chromium 0.030 0.0123
Cyanide 0.016 0.0065
Zinc 0.084 0.0343
Aluminum 0.499 0.221
Oil and grease 0.817 0.817
Suspended solids 1.225 0.980
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

Core Without an Annealing Furnace Scrubber

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 neat oils
Chromium 0.021 0.0083
Cyanide 0.011 0.0044
Zinc 0.057 0.023
Aluminum 0.338 0.150
Oil and grease 0.553 0.553
Suspended solids 0.830 0.664
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

Continuous Sheet Casting Spent Lubricant

Pollutant or pollutant property NSPS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast
Chromium 0.00073 0.00029
Cyanide 0.00039 0.00016
Zinc 0.0020 0.00082
Aluminum 0.012 0.0053
Oil and grease 0.0197 0.019
Suspended solids 0.0295 0.022
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

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 at all times.

Subpart A

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 0.066 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 at all times.

Subpart A

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 3.70
Oil and grease 13.91 13.91
Suspended solids 20.87 16.69
pH (1) (1)
1 Within the range of 7.0 to 10 at all times.

Subpart A

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 0.715 0.29
Cyanide 0.387 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 at all times.

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

§ 467.15 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 A

Core With an Annealing Furnace Scrubber

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 neat oils
Chromium 0.036 0.015
Cyanide 0.024 0.010
Zinc 0.119 0.050
TTO 0.057
Oil and grease (alternate monitoring parameter) 4.3 2.1

Subpart A

Core Without an Annealing Furnace Scrubber

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 neat oils
Chromium 0.025 0.010
Cyanide 0.016 0.007
Zinc 0.081 0.034
TTO 0.038
Oil and grease (alternate monitoring parameter) 2.9 1.5

Subpart A

Continuous Sheet Casting Lubricant

Pollutant or pollutant property PSES
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast
Chromium 0.00086 0.00035
Cyanide 0.00057 0.00024
Zinc 0.0029 0.0012
TTO 0.0014
Oil and grease (alternate monitoring parameter) 0.10 0.052

Subpart A

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 A

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 A

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 A

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 2.82 1.18
TTO 1.34
Oil and grease (alternate monitoring parameter) 100 50

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

§ 467.16 Pretreatment standards for new sources.

Except as provided in 40 CFR 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 wastewater pollutants in aluminum forming process wastewater introduced into a POTW shall not exceed the following values:

Subpart A

Core With an Annealing Furnace Scrubber

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 neat oils
Chromium 0.030 0.013
Cyanide 0.017 0.007
Zinc 0.084 0.035
TTO 0.057
Oil and grease (alternate monitoring parameter) 0.817 0.817

Subpart A

Core Without an Annealing Furnace Scrubber

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 neat oils
Chromium 0.021 0.009
Cyanide 0.011 0.005
Zinc 0.057 0.024
TTO 0.038
Oil and grease (alternate monitoring parameter) 0.54 0.54

Subpart A

Continuous Sheet Casting Lubricant

Pollutant or pollutant property PSNS
Maximum for any 1 day Maximum for monthly average
mg/off-kg (lb/million off-lbs) of aluminum cast
Chromium 0.00073 0.00029
Cyanide 0.00039 0.00016
Zinc 0.0020 0.00082
TTO 0.0014
Oil and grease (alternate monitoring parameter) 0.020 0.020

Subpart A

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 A

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 A

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 A

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]

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