EPA ID# WASFN1002174
EPA Region 10

3rd Congressional District

Other Names:
Last Update: May, 2012

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The Hamilton/Labree Roads Ground Water Contamination Superfund Site (Site) is located near the intersection of Hamilton and Labree Roads, west of Interstate 5, about two miles southwest of the City of Chehalis in southwest Washington State. The Site includes two areas where releases of hazardous wastes are known to have occurred: the Hamilton Road Impacted Area (HRIA) (10 acres) and the S.C. Breen Construction Company (Breen) Property (11 acres). The Site also contains an area where a release is likely to have occurred called the Thurman Berwick Creek Area (west of the HRIA and south of the Breen Property). Contaminated groundwater plumes originating from these areas extend downgradient and west of Labree Road. The HRIA comprises Operable Unit (OU) 1 while the Breen Property, Thurman Berwick Creek Area, and downgradient areas outside of the HRIA comprise OU 2.

The contaminants of potential concern are tetrachloroethene (PCE) and its degradation products trichloroethene (TCE), cis-1,2-dichloroethene (DCE), and vinyl chloride, as well as the chemicals tetrahydrofuron and methylene chloride. Total Petroleum Hydrocarbons (TPHs) are also considered to be a presumptive contaminant of concern until more data is collected across the Site. PCE is the primary or "indicator" contaminant at the Site.

Site Responsibility: This site is being addressed through federal and potentially responsible party actions.

NPL Listing HistoryDates
Proposed Date:05/11/2000
Removed Date:
Withdrawal Date:
Final Date:07/27/2000
Deleted Date:

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Media Affected: Surface water, ground water, soil and sediments
The indicator contaminant, PCE, is found primarily in groundwater, and to a lessor extent in surface water, creek bed/sediment and subsurface soils. In groundwater, contamination occurs in the shallow aquifer located approximately 5 to 50 feet below ground surface (bgs). The shallow aquifer is used as a drinking water source for area residences not served on the City of Chehalis water system. There is a deeper aquifer across the Site which is separated from the shallow aquifer by an aquitard. Historically, there have been no confirmed detections of PCE from private wells thought to be screened in the deeper aquifer.

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SITE MANAGER(S):Tamara Langton
E-MAIL ADDRESS:langton.tamara@epa.gov
PHONE NUMBER:206-553-2709
E-MAIL ADDRESSsherbina.debra@epa.gov
PHONE NUMBER:206-553-0247
Information pertaining to this site is housed at the following location(s):

EPA Hamilton/LaBree web site: http://yosemite.epa.gov/R10/CLEANUP.NSF/sites/HLabree

Chehalis Timberland Library
76 N.E. Park St
Chehalis, Washington 98532
(call ahead for hours: 360-748-3301)

EPA Region 10 Superfund Records Center
1200 6th Ave, Ste 900
Seattle, Washington 98101
(call for appointment: 206-553-4494)