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Title 40 → Chapter I → Subchapter N → Part 464 → Subpart D |

Title 40: Protection of Environment

PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY

Contents

§464.40 Applicability; description of the zinc casting subcategory.

§464.41 Specialized definitions.

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

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

§464.44 New source performance standards.

§464.45 Pretreatment standards for existing sources.

§464.46 Pretreatment standards for new sources.

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

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 zinc casting operations as defined in §464.02(d).

For the purpose of this subpart:

(a) Total Toxic Organics (TTO). TTO is a regulated parameter under PSES (§464.45) and PSNS (§464.46) for the zinc 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 (§464.45(a) and §464.46(a)):

21. 2,4,6-trichlorophenol

22. para-chloro meta-cresol

31. 2,4-dichlorophenol

34. 2,4-dimethylphenol

39. fluoranthene

44. methylene chloride (dichloromethane)

65. phenol

66. bis(2-ethylhexyl) phthalate

68. di-n-butyl phthalate

70. diethyl phthalate

85. tetrachloroethylene

(2) Die Casting (§465.45(b) and §464.46(b)):

1. acenaphthene

21. 2,4,6-trichlorophenol

22. para-chloro meta-cresol

24. 2-chlorophenol

34. 2,4-dimethylphenol

44. methylene chloride (dichloromethane)

55. naphthalene

65. phenol

66. bis (2-ethylhexyl) phthalate

68. di-n-butyl phthalate

70. diethyl phthalate

85. tetrachloroethylene

86. toluene

87. trichloroethylene

(3) Melting Furnace Scrubber (§464.45(c) and §464.46(c)):

31. 2,4-dichlorophenol

34. 2,4-dimethylphenol

39. fluoranthene

44. methylene chloride (dichloromethane)

55. naphthalene

65. phenol

66. bis(2-ethylhexyl) phthalate

68. di-n-butyl phthalate

85. tetrachloroethylene

86. toluene

87. trichloroethylene

(4) Mold Cooling (§464.45(d) and §464.46(d)):

21. 2,4,6-trichlorophenol

22. para-chloro meta-cresol

31. 2,4-dichlorophenol

34. 2,4-dimethylphenol

39. fluoranthene

44. methylene chloride (dichloromethane)

65. phenol

66. bis(2-ethylhexyl) phthalate

68. di-n-butyl phthalate

70. diethyl phthalate

85. tetrachloroethylene

[50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]

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 Sm3 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/1) limitations shall apply. Concentration limitations and annual average mass limitations shall only apply to noncontinuous 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) | 0.0344 | 0.0187 |

Lead (T) | 0.0353 | 0.0174 |

Zinc (T) | 0.0509 | 0.0192 |

Oil and grease | 1.34 | 0.446 |

TSS | 1.7 | 0.67 |

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) | 0.77 | 0.42 | 0.0076 |

Lead (T) | 0.79 | 0.39 | 0.0098 |

Zinc (T) | 1.14 | 0.43 | 0.0121 |

Oil and grease | 30 | 10 | 0.223 |

TSS | 38 | 15 | 0.446 |

pH | (^{3}) | (^{3}) | (^{3}) |

^{1}kg/1000 kkg (pound per million pounds) of metal poured.

^{2}These concentrations must be multiplied by the ratio of (5.35/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) Die 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) | 0.0066 | 0.0036 |

Lead (T) | 0.0068 | 0.0034 |

Zinc (T) | 0.0098 | 0.0037 |

Total phenols | 0.0074 | 0.0026 |

Oil and grease | 0.259 | 0.0864 |

TTS | 0.328 | 0.13 |

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) | 0.77 | 0.42 | 0.0015 |

Lead (T) | 0.79 | 0.39 | 0.0019 |

Zinc (T) | 1.14 | 0.43 | 0.0023 |

Total phenols | 0.86 | 0.3 | 0.0017 |

Oil and grease | 30 | 10 | 0.0432 |

TSS | 38 | 15 | 0.0864 |

pH | (^{3}) | (^{3}) | (^{3}) |

^{1}kg/1000 kkg (pound per million pounds) of metal poured.

^{2}These concentrations must be multiplied by the ratio of (1.04/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) Melting Furnace Scrubber Operations.

BPT Effluent Limitations

Pollutant or pollutant property | Maximum for any 1 day | Maximum for monthly average |
---|---|---|

kg/62.3 millions Sm^{3} (pounds per billion SCF) of air scrubbed | ||

Copper (T) | 1.56 | 0.852 |

Lead (T) | 1.6 | 0.791 |

Zinc (T) | 2.31 | 0.872 |

Total Phenols | 1.74 | 0.608 |

Oil and grease | 60.8 | 20.3 |

TSS | 77.1 | 30.4 |

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) | 0.77 | 0.42 | 0.345 |

Lead (T) | 0.79 | 0.39 | 0.446 |

Zinc (T) | 1.14 | 0.43 | 0.548 |

Total Phenols | 0.86 | 0.3 | 0.406 |

Oil and grease | 30 | 10 | 10.1 |

TSS | 38 | 15 | 20.3 |

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 (0.243/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) 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) | 0.304 | 0.166 |

Lead (T) | 0.311 | 0.154 |

Zinc (T) | 0.449 | 0.17 |

Oil and grease | 11.8 | 3.94 |

TSS | 15 | 5.91 |

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) | 0.77 | 0.42 | 0.067 |

Lead (T) | 0.79 | 0.39 | 0.0867 |

Zinc (T) | 1.14 | 0.43 | 0.106 |

Oil and grease | 30 | 10 | 1.97 |

TSS | 38 | 15 | 3.94 |

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 (47.3/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 21762, June 16, 1986]

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 Sm3 or lb/billion SCF of air scrubbed) effluent limitations for copper, lead, zinc, and total phenols. For non-continuous dischargers, annual average mass limitations and maximum day and maximum for monthly average concentration (mg/1) 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) | 0.0344 | 0.0187 |

Lead (T) | 0.0237 | 0.0116 |

Zinc (T) | 0.0339 | 0.0129 |

Maximum for any 1 day | Maximum for monthly average | Annual average^{1} | |
---|---|---|---|

(mg/l)^{2} | (mg/l)^{2} | ||

Copper (T) | 0.77 | 0.42 | 0.0076 |

Lead (T) | 0.53 | 0.26 | 0.0067 |

Zinc (T) | 0.76 | 0.29 | 0.008 |

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

^{2}These concentrations must be multiplied by the ratio of (5.34/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(b) Die 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) | 0.0066 | 0.0036 |

Lead (T) | 0.0046 | 0.0022 |

Zinc (T) | 0.0066 | 0.0025 |

Total phenols | 0.0074 | 0.0026 |

Maximum for any 1 day | Maximum for monthly average | Annual average^{1} | |
---|---|---|---|

(mg/l)^{2} | (mg/l)^{2} | ||

Copper (T) | 0.77 | 0.42 | 0.0015 |

Lead (T) | 0.53 | 0.26 | 0.0013 |

Zinc (T) | 0.76 | 0.29 | 0.0016 |

Total phenols | 0.86 | 0.3 | 0.0017 |

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

^{2}These concentrations must be multiplied by the ratio of (1.04/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(c) 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) | 1.56 | 0.852 |

Lead (T) | 1.07 | 0.527 |

Zinc (T) | 1.54 | 0.588 |

Total phenolse | 1.74 | 0.608 |

Maximum for any 1 day | Maximum for monthly average | Annual average^{1} | |
---|---|---|---|

(mg/l)^{2} | (mg/l)^{2} | ||

Copper (T) | 0.77 | 0.42 | 0.345 |

Lead (T) | 0.53 | 0.26 | 0.304 |

Zinc (T) | 0.76 | 0.29 | 0.365 |

Total phenols | 0.86 | 0.3 | 0.406 |

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

^{2}These concentrations must be multiplied by the ratio of (0.243/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(d) 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) | 0.304 | 0.166 |

Lead (T) | 0.209 | 0.103 |

Zinc (T) | 0.3 | 0.114 |

Maximum for any 1 day | Maximum for monthly average | Annual average^{1} | |
---|---|---|---|

(mg/l)^{2} | (mg/l)^{2} | ||

Copper (T) | 0.77 | 0.42 | 0.067 |

Lead (T) | 0.53 | 0.26 | 0.0591 |

Zinc (T) | 0.76 | 0.29 | 0.071 |

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

^{2}These concentrations must be multiplied by the ratio of (47.3/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 21762, June 16, 1986]

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) | 0.0344 | 0.0187 |

Lead (T) | 0.0237 | 0.0116 |

Zinc (T) | 0.0339 | 0.0129 |

Oil and grease | 1.34 | 0.446 |

TSS | 0.67 | 0.536 |

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) | 0.77 | 0.42 | 0.0076 |

Lead (T) | 0.53 | 0.26 | 0.0067 |

Zinc (T) | 0.76 | 0.29 | 0.008 |

Oil and grease | 30 | 10 | 0.223 |

TSS | 15 | 12 | 0.116 |

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 (5.34/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) Die 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) | 0.0066 | 0.0036 |

Lead (T) | 0.0046 | 0.0022 |

Zinc (T) | 0.0066 | 0.0025 |

Total phenols | 0.0074 | 0.0026 |

Oil and grease | 0.259 | 0.0864 |

TSS | 0.13 | 0.104 |

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) | 0.77 | 0.42 | 0.0015 |

Lead (T) | 0.53 | 0.26 | 0.0013 |

Zinc (T) | 0.76 | 0.29 | 0.0016 |

Total phenols | 0.86 | 0.3 | 0.0017 |

Oil and grease | 30 | 10 | 0.0432 |

TSS | 15 | 12 | 0.0225 |

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 (1.04/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) 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) | 1.56 | 0.852 |

Lead (T) | 1.07 | 0.527 |

Zinc (T) | 1.54 | 0.588 |

Total phenols | 1.74 | 0.608 |

Oil and grease | 60.8 | 20.3 |

TSS | 30.4 | 24.3 |

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) | 0.77 | 0.42 | 0.345 |

Lead (T) | 0.53 | 0.26 | 0.304 |

Zinc (T) | 0.76 | 0.29 | 0.365 |

Total phenols | 0.86 | 0.3 | 0.406 |

Oil and grease | 30 | 10 | 10.1 |

TSS | 15 | 12 | 5.27 |

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 (0.243/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) 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) | 0.304 | 0.166 |

Lead (T) | 0.209 | 0.103 |

Zinc (T) | 0.3 | 0.114 |

Oil and grease | 11.8 | 3.94 |

TSS | 5.91 | 4.73 |

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) | 0.77 | 0.42 | 0.067 |

Lead (T) | 0.53 | 0.26 | 0.0591 |

Zinc (T) | 0.76 | 0.29 | 0.071 |

Oil and grease | 30 | 10 | 1.97 |

TSS | 15 | 12 | 1.03 |

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 (47.3/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 21762, June 16, 1986]

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

Copper (T) | 0.0344 | 0.0187 |

Lead (T) | 0.0237 | 0.0116 |

Zinc (T) | 0.0339 | 0.0129 |

TTO | 0.093 | 0.0304 |

Oil and grease (for alternate monitoring) | 1.34 | 0.446 |

(b) Die 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) | 0.0066 | 0.0036 |

Lead (T) | 0.0046 | 0.0022 |

Zinc (T) | 0.0066 | 0.0025 |

Total phenols | 0.0074 | 0.0026 |

TTO | 0.0196 | 0.0064 |

Oil and grease for alternate monitoring) | 0.259 | 0.0864 |

(c) 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) | 1.56 | 0.852 |

Lead (T) | 1.07 | 0.527 |

Zinc (T) | 1.54 | 0.588 |

Total phenols | 1.74 | 0.608 |

TTO | 3.95 | 1.29 |

Oil and grease for alternate monitoring) | 60.8 | 20.3 |

(d) 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) | 0.304 | 0.166 |

Lead (T) | 0.209 | 0.103 |

Zinc (T) | 0.3 | 0.114 |

TTO | 0.821 | 0.268 |

Oil and grease for alternate monitoring) | 11.8 | 3.94 |

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) | 0.0344 | 0.0187 |

Lead (T) | 0.0237 | 0.0116 |

Zinc (T) | 0.0339 | 0.0129 |

TTO | 0.093 | 0.0304 |

Oil and grease (for alternate monitoring) | 1.34 | 0.446 |

(b) Die 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) | 0.0066 | 0.0036 |

Lead (T) | 0.0046 | 0.0022 |

Zinc (T) | 0.0066 | 0.0025 |

Total phenols | 0.0074 | 0.0026 |

TTO | 0.0196 | 0.0064 |

Oil and grease (for alternate monitoring) | 0.259 | 0.0864 |

(c) 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) | 1.56 | 0.852 |

Lead (T) | 1.07 | 0.527 |

Zinc (T) | 1.54 | 0.588 |

Total phenols | 1.74 | 0.608 |

TTO | 3.95 | 1.29 |

Oil and grease (for alternate monitoring) | 60.8 | 20.3 |

(d) 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) | 0.304 | 0.166 |

Lead (T) | 0.209 | 0.103 |

Zinc (T) | 0.3 | 0.114 |

TTO | 0.821 | 0.268 |

Oil and grease (for alternate monitoring) | 11.8 | 3.94 |

[50 FR 45247, Oct. 30, 1985; 51 FR 21762, June 16, 1986]