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EXAMPLES Piscataway chemical pond One example of a chemical pond is situated in the woods of Piscataway, New Jersey . It was used by Union Carbide during the active phase of plant operation. Its main use was for drainage of chemicals. Hazardous and exotic chemicals would go down drains in the plant and flow to the pond. it would later be pumped back to the factory via two large pumps. There it would be distilled to remove Acetone and other hazardous chemicals from the mix. This process was overall harmful to the environment and polluted the Groundwater . Map illustrating Union Carbide Chemical Pond, Piscataway, New Jersey Oak Ridge waste pond The United States . During the 1970s, the pond was backfilled with Clay and Shale , and finally capped with Asphalt . In the mid 1990s, as a temporary solution to concerns that soil and sediments could migrate into nearby streams and, ultimately, reservoirs used for recreation and Drinking Water supplies, Department Of Energy officials installed a Cryogenic stabilization system at the waste pond, freezing the soil and groundwater to a depth of approximately 30 feet around the pond, thereby forming a barrier to groundwater leaching. In February 2004, the cryogenic system was dismantled, replaced with a temporary thermal foam blanket to keep the soil cold, and the pond was excavated. The soil in the areas surrounding the frozen pond contained lower Levels Of Contamination than the pond itself, but enough contamination that it had to be removed. Approximately 10,000 cubic yards of soil were removed from the surrounding areas. Another 5,400 cubic yards of soil were excavated from the pond itself. Gwenyth Laird Pernie, ''Crew Takes on Chemical Pond'', Construction Equipment Guide (2005) REFERENCES SEE ALSO |
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