Regulations last checked for updates: May 01, 2025

Title 40 - Protection of Environment last revised: Nov 01, 2025
All TitlesTitle 40Chapter IPart 464Subpart B - Subpart B—Copper Casting Subcategory
Collapse to view only § 464.25 - Pretreatment standards for existing sources.
Table of Contents

§ 464.20 - Applicability; description of the copper casting subcategory.

§ 464.21 - Specialized definitions.

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

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

§ 464.24 - New source performance standards.

§ 464.25 - Pretreatment standards for existing sources.

§ 464.26 - Pretreatment standards for new sources.

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

§ 464.20 - Applicability; description of the copper casting subcategory.

The provisions of this subpart are applicable to discharges to waters of the United States and to the introduction of pollutants into publicly owned treatment works resulting from copper casting operations as defined in § 464.02(b).

§ 464.21 - Specialized definitions.

For the purpose of this subpart:

(a) Total Toxic Organics (TTO). TTO is a regulated parameter under PSES (§ 464.25) and PSNS (§ 464.26) for the copper subcategory and is comprised of a discrete list of toxic organic pollutants for each process segment where it is regulated, as follows:

(1) Casting Quench (§ 464.25(a) and § 464.26(a)):

23. chloroform (trichloromethane) 64. pentachlorophenol 66. bis(2-ethylhexyl)phthalate 71. dimethyl phthalate

(2) Dust Collection Scrubbers (§ 464.25(c) and 464.26(c)):

1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis(2-ethylhexyl)phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzofluoranthene 75. benzo(k) fluoranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. phenanthrene 84. pyrene

(3) Investment Casting (§ 464.25(e) and § 464.26(e)):

1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis (2-ethylhexyl)phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzofluoranthene 75. benzo(k) fluoranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. Phenanthrene 84. pyrene

(4) Melting Furnace Scrubber (§ 464.25(f) and § 464.26(f)):

1. acenaphthene 22. para-chloro meta-cresol 23. chloroform (trichloromethane) 34. 2,4-dimethylphenol 55. naphthalene 58. 4-nitrophenol 64. pentachlorophenol 65. phenol 66. bis (2-ethylhexyl) phthalate 67. butyl benzyl phthalate 68. di-n-butyl phthalate 70. diethyl phthalate 71. dimethyl phthalate 72. benzo(a)anthracene (1,2-benzanthracene) 74. 3,4-benzoflouranthene 75. benzo(k) flouranthene 76. chrysene 77. acenaphthylene 78. anthracene 81. phenanthrene 84. pyrene

(5) Mold Cooling (§ 464.25(g) and § 464.26(g)):

23. chloroform (trichloromethane) 64. pentachlorophenol 66. bis(2-ethylhexyl)phthalate 71. dimethyl phthalate
§ 464.22 - Effluent limitations guidelines 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, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm 3 or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Quench Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.03070.0168
Lead (T)0.03150.0156
Zinc (T)0.04550.0171
Oil and grease1.20.399
TSS1.520.598
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.0068
Lead (T)0.790.390.0088
Zinc (T)1.140.430.0108
Oil and grease30100.199
TSS38150.399
pH( 3)( 3)( 3)

1 kg/1000 kkg (pounds per million pounds) of metal poured

2 These concentrations must be multiplied by the ratio of (4.8/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(b) Direct Chill Casting Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.9520.47
Zinc (T)1.370.518
Oil and grease36.212.1
TSS45.818.1
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.205
Lead (T)0.790.390.265
Zinc (T)1.140.430.326
Oil and grease30106.03
TSS381512.1
pH( 3)( 3)( 3)

1 kg/1000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (145/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(c) Dust Collection Scrubber Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5530.301
Lead (T)0.5670.28
Zinc (T)0.8180.309
Total phenols0.6170.215
Oil and grease21.57.18
TSS27.310.8
ph( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.122
Lead (T)0.790.390.158
Zinc (T)1.140.430.194
Total phenols0.860.30.144
Oil and grease30103.59
TSS38157.18
pH( 3)( 3)( 3)

1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.086/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

(e) Investment Casting.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)8.484.63
Lead (T)8.74.3
Zinc (T)12.64.74
Oil and grease330110
TSS419165
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.421.87
Lead (T)0.790.392.42
Zinc (T)1.140.432.97
Oil and grease301055.1
TSS3815110
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (1,320/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(f) Melting Furnace Scrubber Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.860.918
Zinc (T)2.681.01
Total phenols2.020.706
Oil and grease70.623.5
TSS89.435.3
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.4
Lead (T)0.790.390.518
Zinc (T)1.140.430.635
Total phenols0.860.30.467
Oil and grease301011.8
TSS381523.5
pH( 3)( 3)( 3)

1 kg/62.3 million Sm 3 (pound per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

(g) Mold Cooling Operations.

BPT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.4020.199
Zinc (T)0.580.219
Oil and grease15.35.09
TSS19.37.63
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.0865
Lead (T)0.790.390.112
Zinc (T)1.140.430.137
Oil and grease30102.54
TSS38155.09
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

[50 FR 45247, Oct. 30, 1985; 51 FR 21760, June 16, 1986]
§ 464.23 - Effluent limitations guidelines 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, except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm 3 or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, and total phenols. For non-continuous discharges, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/l) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to non-continuous dischargers.

(a) Casting Quench Operations.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.0307.0168
Lead (T)0.0211.0104
Zinc (T)0.0303.0116
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.0068
Lead (T)0.530.260.006
Zinc (T)0.760.290.0072

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (4.8/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(b) Direct Chill Casting Operations.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.6390.314
Zinc (T)0.9160.35
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.205
Lead (T)0.530.260.181
Zinc (T)0.760.290.217

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (145/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(c) Dust Collection Scrubber Operations.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5530.301
Lead (T)0.380.187
Zinc (T)0.5450.208
Total phenols0.6170.215
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.122
Lead (T)0.530.260.108
Zinc (T)0.760.290.129
Total phenols0.860.30.144

1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.086/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

(e) Investment Casting.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1000 kkg (pounds per million pounds) of metal poured
Copper (T)8.484.63
Lead (T)5.842.86
Zinc (T)8.373.19
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.421.87
Lead (T)0.530.261.65
Zinc (T)0.760.291.98

1 kg/1000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (1,320/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(f) Melting Furnace Scrubber Operations.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.250.612
Zinc (T)1.790.673
Total phenols2.020.706
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.4
Lead (T)0.530.260.353
Zinc (T)0.760.290.424
Total phenols0.860.30.471

1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

(g) Mold Cooling Operations.

BAT Effluent Limitations

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.270.132
Zinc (T)0.3870.148
Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.0865
Lead (T)0.530.260.0763
Zinc (T)0.760.290.0916

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

[50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986]
§ 464.24 - New source performance standards.

Any new source subject to this subpart must achieve the following new source performance standards (NSPS), except that non-continuous dischargers shall not be subject to the maximum day and maximum for monthly average mass (kg/1,000 kkg or lb/million lb of metal poured; kg/62.3 million Sm 3 or lb/billion SCF of air scrubbed) effluent standards for copper, lead, zinc, total phenols, oil and grease, and TSS. For non-continuous dischargers, annual average mass standards and maximum day and maximum for monthly average concentration (mg/l) standards shall apply. Concentration standards and annual average mass standards shall only apply to non-continuous dischargers.

(a) Casting Quench Operations.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.03070.0168
Lead (T)0.02110.0104
Zinc (T)0.03030.0116
Oil and grease1.20.399
TSS0.5980.479
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.0068
Lead (T)0.530.260.006
Zinc (T)0.760.290.0072
Oil and grease30100.199
TSS15120.104
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (4.8/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(b) Direct Chill Casting Operations.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.6390.314
Zinc (T)0.9160.35
Oil and grease36.212.1
TSS18.114.5
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.205
Lead (T)0.530.260.181
Zinc (T)0.760.290.217
Oil and grease30106.03
TSS15123.13
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (145/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(c) Dust Collection Scrubber Operations.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5530.301
Lead (T)0.380.187
Zinc (T)0.5450.208
Total phenols0.6170.215
Oil and grease21.57.18
TSS10.88.61
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.122
Lead (T)0.530.260.108
Zinc (T)0.760.290.129
Total phenols0.860.30.144
Oil and grease30103.59
TSS15121.87
pH( 3)( 3)( 3)

1 kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.086/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to navigable waters.

(e) Investment Casting.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per millions pounds) of metal poured
Copper (T)8.484.63
Lead (T)5.842.86
Zinc (T)8.373.19
Oil and grease330110
TSS165132
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2mg/l) 2
Copper (T)0.770.421.87
Lead (T)0.530.261.65
Zinc (T)0.760.291.98
Oil and grease301055.1
TSS151228.6
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pounds) of metal poured.

2 These concentrations must be multiplied by the ratio of (1,320/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

(f) Melting Furnace Scrubber Operations.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.250.612
Zinc (T)1.790.673
Total phenols2.020.706
Oil and grease70.623.5
TSS35.328.2
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/l) 2(mg/l) 2
Copper (T)0.770.420.4
Lead (T)0.530.260.353
Zinc (T)0.760.290.424
Total phenols0.860.30.471
Oil and grease301011.8
TSS15126.12
pH( 3)( 3)( 3)

1 kg/62.3 Sm 3 (pounds per billion SCF) of air scrubbed.

2 These concentrations must be multiplied by the ratio of (0.282/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

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

(g) Mold Cooling Operations.

NSPS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.270.132
Zinc (T)0.3870.148
Oil and grease15.35.09
TSS7.636.11
pH( 1)( 1)

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

Maximum for any 1 day Maximum for monthly average Annual average 1
(mg/1) 2(mg/1) 2
Copper (T)0.770.420.0865
Lead (T)0.530.260.0763
Zinc (T)0.760.290.0916
Oil and grease30102.54
TSS15121.32
pH( 3)( 3)( 3)

1 kg/1,000 kkg (pounds per million pound) of metal poured.

2 These concentrations must be multiplied by the ratio of (61/x) where x is the actual normalized process waste-water flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

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

[50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986]
§ 464.25 - 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.

(a) Casting Quench Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1000 kkg (pounds per million pounds) of metal poured
Copper (T)0.03070.0168
Lead (T)0.02110.0104
Zinc (T)0.03030.0116
TTO0.03350.0109
Oil and grease (for alternate monitoring)1.20.399

(b) Direct Chill Casting Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.6390.314
Zinc (T)0.9160.35

(c) Dust Collection Scrubber Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5520.301
Lead (T)0.380.187
Zinc (T)0.5450.208
Total phenols0.6170.215
TTO1.650.54
Oil and grease (for alternate monitoring)21.57.18

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.

(e) Investment Casting.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)8.484.63
Lead (T)5.842.86
Zinc (T)8.373.19
TTO25.48.29
Oil and grease for alternate monitoring)330110

(f) Melting Furnace Scrubber Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.250.612
Zinc (T)1.790.673
Total phenols2.020.706
TTO5.411.77
Oil and grease (for alternate monitoring)70.623.5

(g) Mold Cooling Operations.

PSES

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.270.132
Zinc (T)0.3870.148
TTO0.4280.14
Oil and grease (for alternate monitoring)15.35.09
§ 464.26 - Pretreatment standards for new sources.

Except as provided in 40 CFR 403.7, any new source subject to this subpart which introduces pollutants into publicly owned treatment works must comply with 40 CFR part 403 and achieve the following pretreatment standards for new sources.

(a) Casting Quench Operations.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.03070.0168
Lead (T)0.02110.0104
Zinc (T)0.03030.0116
TTO0.03350.0109
Oil and grease (for alternate monitoring)1.20.399

(b) Direct Chill Casting Operations.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.9280.506
Lead (T)0.6390.314
Zinc (T)0.9160.35

(c) Dust Collection Scrubber Operations.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 Million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)0.5520.301
Lead (T)0.380.187
Zinc (T)0.5450.208
Total Phenols0.6170.215
TTO1.650.54
Oil and Grease (for alternate monitoring21.57.18

(d) Grinding Scrubber Operations. No discharge of process wastewater pollutants to a POTW.

(e) Investment Casting.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)8.484.63
Lead (T)5.842.86
Zinc (T)8.373.19
TTO25.48.29
Oil and Grease (for alternate monitoring330110

(f) Melting Furnace Scrubber Operations.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/62.3 million Sm 3 (pounds per billion SCF) of air scrubbed
Copper (T)1.810.988
Lead (T)1.250.612
Zinc (T)1.790.673
Total Phenols2.020.706
TTO5.411.77
Oil and Grease (for alternate monitoring70.623.5

(g) Mold Cooling Operations.

PSNS

Pollutant or pollutant property Maximum for any 1 day Maximum for monthly average
kg/1,000 kkg (pounds per million pounds) of metal poured
Copper (T)0.3920.214
Lead (T)0.270.132
Zinc (T)0.3870.148
TTO0.4280.14
Oil and Grease (for alternate monitoring15.35.09
§ 464.27 - Effluent limitations guidelines representing the degree of effluent reduction attainable by the application of the best conventional pollutant control technology. [Reserved]
authority: Secs. 301, 304 (b), (c), (e), and (g), 306 (b) and (c), 307, 308, and 501 of the Clean Water Act (Federal Water Pollution Control Act Amendments of 1972, as amended by the Clean Water Act of 1977) (the “Act”); 33 U.S.C. 1311,1314,c,e, 1316 (b) andc, 1317 (b) andc,1318,and; 86 Stat. 816, Pub. L. 92-500; 91 Stat. 1567, Pub. L. 95-217
source: 50 FR 45247, Oct. 30, 1985, unless otherwise noted.
cite as: 40 CFR 464.25
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