Statutes, codes, and regulations
Code of Federal Regulations
Title 40 - PROTECTION OF ENVIRONMENTChapter I - ENVIRONMENTAL PROTECTION AGENCYSubchapter N - EFFLUENT GUIDELINES AND STANDARDSPart 464 - METAL MOLDING AND CASTING POINT SOURCE CATEGORY
Subpart B - COPPER CASTING SUBCATEGORY
Section 464.24 - New source performance standards

40 C.F.R. § 464.24

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Current through October 31, 2024
Section 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 Sm3 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 averageAnnual average1
(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 averageAnnual average1
(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 Sm3 (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 averageAnnual average1
(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 Sm3 (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 averageAnnual average1
(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 Sm3 (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 averageAnnual average1
(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 Sm3 (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 averageAnnual average1
(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.

40 C.F.R. §464.24

50 FR 45247, Oct. 30, 1985; 51 FR 21761, June 16, 1986