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Waste pond - Wikipedia

From Wikipedia, the free encyclopedia

A waste pond or chemical pond is a small impounded water body used for the disposal of water pollutants, and sometimes utilized as a method of recycling or decomposing toxic substances. Such waste ponds may be used for regular disposal of pollutant materials or may be used as upset receivers for special pollution events.^[1] Often, chemical ponds themselves are addressed for cleanup action after their useful life is over or when a risk of groundwater contamination arises.^[2]

Peak usage of waste ponds in the United States occurred in the period 1955 to 1985, after which the environmental risks of pond technology were sufficiently understood,^[3] such that alternative technologies^{[clarification needed]} for waste disposal gradually began to displace many of the waste ponds. Waste ponds often have pond liners, such as concrete or robust synthetic polymeric materials, to prevent infiltration of chemicals to soil or groundwater.

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 to the pond and 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.^[4]

Oak Ridge waste pond

The United States Oak Ridge National Laboratory operated for more than 50 years, performing research and production at its facility in the Melton Valley area of the Oak Ridge Reservation, in Oak Ridge, Tennessee, before it was decommissioned in the mid 1960s. One of the results of this activity was a waste pond, which was contaminated with radioactive waste including strontium-90, caesium-137; tritium, and transuranics. 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 (9.1 m) 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 (7,600 m³) of soil were removed from the surrounding areas. Another 5,400 cubic yards (4,100 m³) of soil were excavated from the pond itself.^[5]

References

^ "U.S. Nuclear Regulatory Commission details of handling certain upset events".
^ "Idaho National Laboratory: U.S. Department of Energy, EPA ID# ID4890008952".
^ David Crimp, Leda Patmore et al., Environmental Assessment of Kaiser Refractories Waste Pond, Moss Landing, California, Earth Metrics Inc., Santa Cruz County, California and the State of California Environmental Clearinghouse (1976)
^ "Google Maps". Google Maps.
^ Gwenyth Laird Pernie, Crew Takes on Chemical Pond, Construction Equipment Guide (2005)

v t e Ponds, pools, and puddles
Ponds	Ash pond Balancing lake Ballast pond Beel Cooling pond Detention pond Dew pond Evaporation pond Facultative lagoon Garden pond Ice pond Immersion pond Infiltration basin Kettle pond Log pond Melt pond Mill pond Polishing pond Raceway pond Retention pond Sag pond Salt evaporation pond Sediment pond Settling pond Solar pond Stepwell Stew pond Tailings Tarn Waste pond Waste stabilization pond
Pools	Anchialine pool Brine pool Infinity pool Natural pool Ocean pool Plunge pool Reflecting pool Spent fuel pool Stream pool Swimming pool Tide pool Vernal pool
Puddles	Bird bath Coffee ring effect Puddle Puddles on a surface Seep puddle
Biome	Beaver dam Duck pond Fish pond Goldfish pond Koi pond
Ecosystems	Aquatic ecosystem Freshwater ecosystem Lake ecosystem
Related	Aerated lagoon Bakki shower Big fish–little pond Body of water Constructed wetland Full pond Hydric soil Phytotelma Pond of Abundance Pond liner Ponding Puddle (M C Escher) Spring Swimming hole Water aeration Water garden Water Lilies (Monet) Well

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Examples

Piscataway chemical pond

Oak Ridge waste pond

See also

References