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Title 40 → Chapter I → Subchapter N → Part 464 → Subpart C → §464.34 |

Title 40: Protection of Environment

PART 464—METAL MOLDING AND CASTING POINT SOURCE CATEGORY

Subpart C—Ferrous Casting Subcategory

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/1,000 kkg or lb/million lb of sand reclaimed; 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 Cleaning Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 0.0129 | 0.0071 |

Lead (T) | 0.0237 | 0.0116 |

Zinc (T) | 0.0437 | 0.0165 |

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) | 0.29 | 0.16 | 0.0029 |

Lead (T) | 0.53 | 0.26 | 0.0067 |

Zinc (T) | 0.98 | 0.37 | 0.0116 |

Oil and grease | 30 | 10 | 0.223 |

TTS | 15 | 12 | 0.116 |

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 (5.33/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.

(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

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) | 0.0129 | 0.0071 |

Lead (T) | 0.0353 | 0.0174 |

Zinc (T) | 0.0656 | 0.025 |

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

Copper (T) | 0.29 | 0.16 | 0.0029 |

Lead (T) | 0.79 | 0.39 | 0.0098 |

Zinc (T) | 1.47 | 0.56 | 0.0179 |

Oil and grease | 30 | 10 | 0.223 |

TTS | 38 | 15 | 0.446 |

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 (5.35/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) Casting Quench Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 0.0138 | 0.0076 |

Lead (T) | 0.0252 | 0.0124 |

Zinc (T) | 0.0466 | 0.0176 |

Oil and grease | 1.43 | 0.476 |

TSS | 0.713 | 0.571 |

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) | 0.29 | 0.16 | 0.0031 |

Lead (T) | 0.53 | 0.26 | 0.0071 |

Zinc (T) | 0.98 | 0.37 | 0.0124 |

Oil and grease | 30 | 10 | 0.238 |

TSS | 15 | 12 | 0.124 |

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

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

^{2}Within the range of 7.0 to 10.0 at all times.

^{3}These concentrations must be multiplied by the ratio of (5.7/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of metal poured) for a specific plant.

(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

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) | 0.0138 | 0.0076 |

Lead (T) | 0.0376 | 0.0185 |

Zinc (T) | 0.0699 | 0.0266 |

Oil and grease | 1.43 | 0.476 |

TSS | 1.81 | 0.713 |

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) | 0.29 | 0.16 | 0.0031 |

Lead (T) | 0.79 | 0.39 | 0.0105 |

Zinc (T) | 1.47 | 0.56 | 0.019 |

Oil and grease | 30 | 10 | 0.238 |

TSS | 38 | 15 | 0.476 |

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 (5.7/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. (1) Applicable to plants that are casting primarily ductible or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 0.218 | 0.12 |

Lead (T) | 0.398 | 0.195 |

Zinc (T) | 0.736 | 0.278 |

Total Phenols | 0.646 | 0.225 |

Oil and grease | 22.5 | 7.51 |

TSS | 11.3 | 9.01 |

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) | 0.29 | 0.16 | 0.0488 |

Lead (T) | 0.53 | 0.26 | 0.113 |

Zinc (T) | 0.98 | 0.37 | 0.195 |

Total phenols | 0.86 | 0.3 | 0.15 |

Oil and grease | 30 | 10 | 3.76 |

TSS | 15 | 12 | 1.95 |

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

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

^{2}Within the range of 7.0 to 10.0 at all times.

^{3}These concentrations must be multiplied by the ratio of (0.09/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 SCF of air scrubbed) for a specific plant.

(2) Applicable to plants that are casting primarily steel and to plants that are casting primarily malleable iron where equal to or less than 3,557 tons of metal are poured per year.

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) | 0.218 | 0.12 |

Lead (T) | 0.593 | 0.293 |

Zinc (T) | 1.1 | 0.421 |

Total phenols | 0.656 | 0.225 |

Oil and grease | 22.5 | 7.51 |

TSS | 28.5 | 11.3 |

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) | 0.29 | 0.16 | 0.0488 |

Lead (T) | 0.79 | 0.39 | 0.165 |

Zinc (T) | 1.47 | 0.56 | 0.3 |

Total phenols | 0.86 | 0.3 | 0.15 |

Oil and grease | 30 | 10 | 3.76 |

TSS | 38 | 15 | 7.51 |

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

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

^{2}Within the range of 7.0 to 10.0 at all times.

^{3}These concentrations must be multiplied by the ratio of (0.09/) where 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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 3.19 | 1.76 |

Lead (T) | 5.84 | 2.86 |

Zinc (T) | 10.8 | 4.07 |

Oil and grease | 330 | 110 |

TSS | 165 | 132 |

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) | 0.29 | 0.16 | 0.716 |

Lead (T) | 0.53 | 0.26 | 1.65 |

Zinc (T) | 0.98 | 0.37 | 2.86 |

Oil and grease | 30 | 10 | 55.1 |

TSS | 15 | 12 | 28.6 |

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.

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) | 3.19 | 1.76 |

Lead (T) | 8.7 | 4.3 |

Zinc (T) | 16.2 | 6.17 |

Oil and grease | 330 | 110 |

TSS | 419 | 165 |

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) | 0.29 | 0.16 | 0.716 |

Lead (T) | 0.79 | 0.39 | 2.42 |

Zinc (T) | 1.47 | 0.56 | 4.41 |

Oil and grease | 30 | 10 | 55.1 |

TSS | 38 | 15 | 110 |

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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 1.02 | 0.561 |

Lead (T) | 1.86 | 0.911 |

Zinc (T) | 3.44 | 1.30 |

Total phenols | 3.01 | 1.05 |

Oil and grease | 105 | 35 |

TSS | 52.6 | 42.1 |

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 | |
---|---|---|---|

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

Copper (T) | 0.29 | 0.16 | 0.228 |

Lead (T) | 0.53 | 0.26 | 0.526 |

Zinc (T) | 0.98 | 0.37 | 0.911 |

Total phenols | 0.86 | 0.3 | 0.701 |

Oil and grease | 30 | 10 | 17.5 |

TSS | 15 | 12 | 9.11 |

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 (0.42/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.

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) | 1.02 | 0.561 |

Lead (T) | 2.77 | 1.37 |

Zinc (T) | 5.15 | 1.96 |

Total phenols | 3.01 | 1.05 |

Oil and grease | 105 | 35 |

TSS | 133 | 52.6 |

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 | |
---|---|---|---|

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

Copper (T) | 0.29 | 0.16 | 0.228 |

Lead (T) | 0.79 | 0.39 | 0.771 |

Zinc (T) | 1.47 | 0.56 | 1.4 |

Total phenols | 0.38 | 0.3 | 0.701 |

Oil and grease | 30 | 10 | 17.5 |

TSS | 38 | 15 | 35 |

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 (0.42/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. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 0.0428 | 0.0236 |

Lead (T) | 0.0783 | 0.0384 |

Zinc (T) | 0.0145 | 0.0546 |

Oil and grease | 4.43 | 1.48 |

TSS | 2.22 | 1.77 |

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)^{1} | ||

Copper (T) | 0.29 | 0.16 | 0.0096 |

Lead (T) | 0.53 | 0.26 | 0.0222 |

Zinc (T) | 0.98 | 0.37 | 0.0384 |

Oil and grease | 30 | 10 | 0.738 |

TSS | 15 | 12 | 0.384 |

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 (17.7/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.

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) | 0.0428 | 0.0236 |

Lead (T) | 0.117 | 0.0576 |

Zinc (T) | 0.217 | 0.0827 |

Oil and grease | 4.43 | 1.48 |

TSS | 5.61 | 2.22 |

pH | (^{1}) | (^{1}) |

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

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

(mg/1)^{2} | (mg/l)^{2} | ||

Copper (T) | 0.29 | 0.16 | 0.0096 |

Lead (T) | 0.79 | 0.39 | 0.0325 |

Zinc (T) | 1.47 | 0.56 | 0.0591 |

Oil and grease | 30 | 10 | 0.738 |

TSS | 38 | 15 | 1.48 |

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 (17.7/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.

(h) Slag Quench Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

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) | 0.0527 | 0.0291 |

Lead (T) | 0.0964 | 0.0473 |

Zinc (T) | 0.178 | 0.0673 |

Oil and grease | 5.46 | 1.82 |

TSS | 2.73 | 2.18 |

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) | 0.29 | 0.16 | 0.0118 |

Lead (T) | 0.53 | 0.26 | 0.0273 |

Zinc (T) | 0.98 | 0.37 | 0.0473 |

Oil and grease | 30 | 10 | 0.909 |

TSS | 15 | 12 | 0.473 |

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 (21.8/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.

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) | 0.0527 | 0.0291 |

Lead (T) | 0.144 | 0.0709 |

Zinc (T) | 0.267 | 0.102 |

Oil and grease | 5.46 | 1.82 |

TSS | 6.91 | 2.73 |

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 | |
---|---|---|---|

(mg/l)^{2} | (mg/1)^{2} | ||

Copper (T) | 0.29 | 0.16 | 0.0118 |

Lead (T) | 0.79 | 0.39 | 0.04 |

Zinc (T) | 1.47 | 0.56 | 0.0728 |

Oil and grease | 30 | 10 | 0.909 |

TSS | 38 | 15 | 1.82 |

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 (21.8/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.

(i) Wet Sand Reclamation Operations. (1) Applicable to plants that are casting primarily ductile or gray iron and to plants that are casting primarily malleable iron where greater than 3,557 tons of metal are poured per year.

NSPS

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

kg/1,000 kkg (pounds per million pounds) of sand reclaimed | ||

Copper (T) | 0.217 | 0.12 |

Lead (T) | 0.396 | 0.194 |

Zinc (T) | 0.732 | 0.276 |

Total phenols | 0.642 | 0.224 |

Oil and grease | 22.4 | 7.47 |

TSS | 11.2 | 8.96 |

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) | 0.29 | 0.16 | 0.0485 |

Lead (T) | 0.53 | 0.26 | 0.112 |

Zinc (T) | 0.98 | 0.37 | 0.194 |

Total phenols | 0.86 | 0.3 | 0.149 |

Oil and grease | 30 | 10 | 3.73 |

TSS | 15 | 12 | 1.94 |

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

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

^{2}These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) for a specific plant.

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

NSPS

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

kg/1,000 kkg (pounds per million pounds) of sand reclaimed | ||

Copper (T) | 0.217 | 0.12 |

Lead (T) | 0.59 | 0.291 |

Zinc (T) | 1.1 | 0.418 |

Total phenols | 0.642 | 0.224 |

Oil and grease | 22.4 | 7.47 |

TSS | 28.4 | 11.2 |

pH | (^{1}) | (^{1}) |

^{1}Within the range of 7.0 to at all times.

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

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

Copper (T) | 0.29 | 0.16 | 0.0485 |

Lead (T) | 0.79 | 0.39 | 0.164 |

Zinc (T) | 1.47 | 0.56 | 0.299 |

Total phenols | 0.86 | 0.3 | 0.149 |

Oil and grease | 30 | 10 | 3.73 |

TSS | 38 | 15 | 7.47 |

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

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

^{2}These concentrations must be multiplied by the ratio of (89.5/x) where x is the actual normalized process wastewater flow (in gallons per 1,000 pounds of sand reclaimed) 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]