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Pond liner for a garden pond A pond liner is an impermeable geomembrane used for retention of liquids, including the lining of reservoirs , retention basins , hazardous and nonhazardous surface impoundments, garden ponds and artificial streams in parks and gardens.
Existing ash ponds that are contaminating groundwater must stop receiving CCR, and close or retrofit with a liner. Existing ash ponds and landfills must comply with structural and location restrictions, where applicable, or close. A pond no longer receiving CCR is still subject to all regulations unless it is dewatered and covered by 2018.
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, [5] 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 ...
Geosynthetic clay liners (GCLs) are factory manufactured hydraulic barriers consisting of a layer of bentonite or other very low-permeability material supported by geotextiles and/or geomembranes, mechanically held together by needling, stitching, or chemical adhesives. Due to environmental laws, any seepage from landfills must be collected and ...
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Facultative lagoon (polishing pond) providing tertiary treatment after a constructed wetland in Hamburg-Allermöhe, Germany. Overflow from the facultative lagoon may be routed through one or more polishing ponds supporting lower populations of anaerobic micro-organisms and a higher proportion of aerobic organisms adapted to survival in lower concentrations of organic material.
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