EPA ID# WAD980836662
EPA Region 10
Lewis County

3rd Congressional District

Other Names: Lewis County Dump, Centralia Sanitary Landfill
Last Update: April, 2010

Hide details for Site DescriptionSite Description

The 55-acre landfill located in Centralia, Washington, operated from 1958 until 1994 and accepted both municipal and industrial waste including soil containing polychlorinated biphenyls (PCBs), paint waste, and pesticide waste. More than 12,000 people living within three miles of the site use groundwater for drinking. The creek is a spawning area for salmon.

Site Responsibility: This site is being addressed through state actions.

NPL Listing HistoryDates
Proposed Date:06/24/1988
Removed Date:
Withdrawal Date:
Final Date:08/30/1990
Deleted Date:

Hide details for Threats and ContaminantsThreats and Contaminants

Media Affected: Groundwater and Surface Water
Groundwater contains elevated levels of chloride, conductivity, and heavy metals such as manganese, arsenic, and iron. Leachate emanating from the landfill contains heavy metals. People who accidentally ingest or come into direct contact with contaminated groundwater or leachate may be at risk. Before closure of the landfill, leachate drained from the landfill into Salzer Creek, a spawning area, nursery, and migration route for Coho Salmon. Salzer Creek empties into the Chehalis River, which is a habitat for Chinook, Coho, and Chum Salmon, and Steelhead Trout.

Hide details for Cleanup ProgressCleanup Progress

In 1991, the site’s potential responsible parties (PRPs), under a State Consent Decree, installed a temporary protective cover over the landfill, and secured the site. In 1994, under a State Consent Decree, the landfill was closed and the PRPs installed a 46-acre cap over the landfill. The final cover system greatly reduces the quantity of leachate generated by nearly eliminating the infiltration of precipitation through refuse. Additional groundwater monitoring was done to determine if additional actions were needed. The Remedial Investigation/Feasibility Study was finalized in June 1998. The proposed final remedy consists of long-term ground water and surface water monitoring and long-term operation and maintenance of the final cover system. No further remedial activities are planned.

Hide details for Regional ContactsRegional Contacts

SITE MANAGER(S):Mohsen Kourehdar (state)
E-MAIL ADDRESS:mkou461@ecy.wa.gov
PHONE NUMBER:360-407-6256

Tim Brincefield (EPA contact)
Information pertaining to this site is housed at the following location(s):
Washington Department of Ecology (Administrative Record)
Southwest Region, Records Center
7272 Cleanwater Lane
Olympia, WA 98504