Hansville Landfill

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Landfill plume and closure areasThe Hansville Landfill operated from 1962 to 1989 and received municipal waste, demolition materials and in a lesser amount, septic tank waste. This site is only a few yards from the border of the Port Gamble S’Klallam reservation and about 4 ½ miles south of the community of Hansville. Since its closure in 1989 this landfill was “capped” covering it with layers of different materials to seal the garbage underground. Although the area of the landfill is 13 acres, the pollution seepage from its contents spread over a much larger landscape. Resulting from a legal battle in the mid 90’s, the reliable party was urged to work with the Department of Ecology to complete a Remedial Investigation to assess the impacts the landfill has had on sediment, groundwater and surface water. After intensive research a pollution plume was mapped showing how the groundwater has transported the contamination and spread it to nearby streams. Through this page you can find documents that detail what chemicals were found and how the pollution will be monitored. You will also find a list of the institutional controls put in place to protect people from coming in contact with any related toxins.

Currently, a Feasibility Study has been completed outlining options for cleaning up this toxic site. It appears the best option may be “natural attenuation” which allows the toxins to dissipate through time. Often this option is chosen when the other cleanup alternatives are not feasible due to cost or available technology. This project is of high interest with our tribe since the pollution plume fan is within our reservation borders. Although this area will continue to be monitored through wells and surface water stations, not all potential chemicals have been tested for. In order to fully understand the risk to people more testing may be needed and additional studies are proposed in the future.

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