MOSES LAKE WELLFIELD CONTAMINATION
(a/k/a SKYLINE WATER SYSTEM)
MOSES LAKE, GRANT COUNTY, WASHINGTON
A public health hazard exists for residents exposed to TCE in the Skyline Water System. Mothers who are exposed to TCE in Skyline drinking water while pregnant may put their children at some risk for adverse developmental effects. A slight cancer risk was also estimated for those residents exposed over many years to the highest levels of TCE detected.
The provision of bottled water to residents using Skyline water is not considered to be adequate to eliminate this potential health hazard since TCE can be breathed as a vapor and absorbed through the skin during normal water use such as clothes/dish washing and bathing/showering.
- Levels of TCE in the Skyline Water System should be reduced below the MCL
or an alternative water supply be made available.
- Bottled water has been made available to Skyline residents since March 1994.
- EPA is currently investigating alternate water sources for Skyline Water
- Quarterly monitoring (4 samples per year) of Skyline water should be performed until a new water source is supplied or until TCE levels are no longer a threat to exceed the MCL. The Remedial Investigation/Feasibility Study (RI/FS) currently being performed as part of the ongoing Superfund process should provide the necessary data to determine the future threat to the Skyline wells.
- DOH- Division of Drinking Water requires that Skyline wells be sampled quarterly.
- DOH will evaluate the RI/FS data with respect to the potential for future exposure of Skyline residents.
- A community health education effort should be initiated to help residents better understand the potential health hazards from using Skyline water.
- DOH distributed a fact sheet to Skyline residents in October 1998 that summarizes this health consultation.
- DOH will evaluate the need for and provide, if necessary, further health education to the Skyline community.