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NPL Site Narrative for Centralia Municipal Landfill

Centralia, Washington

Federal Register Notice:  August 30, 1990

Conditions at proposal (June 24, 1988): Centralia Municipal Landfill is in the southern section of Centralia, Lewis County, Washington. It is bordered on the east by railroad rights-of-way; on the south by Salzer Creek, which empties into the Chehalis River; and on the north by a residential area. The site encompasses 80 acres, of which approximately 50 acres have been used as a landfill since the site opened in 1958. The city received a permit from Lewis County in 1974 to accept municipal waste.

An unknown quantity of hazardous waste containing PCBs and dioxin, as well as other liquid industrial wastes, has been deposited in the landfill, according to the Washington Department of Ecology (WDOE). In 1986, EPA observed leachate from the landfill entering floodwaters of Salzer Creek. The leachate contained cadmium, chromium, iron, manganese, and zinc at levels exceeding Federal primary and secondary drinking water standards, according to EPA tests.

Ground water at the site reaches the surface during the rainy season. The upper and lower aquifers are hydraulically connected so that water can move between them. Over 12,000 Centralia residents obtain drinking water from a blended system that draws primarily from surface water but also uses the lower aquifer within 3 miles of the site on a standby basis. Surface water is used for irrigation.

WDOE is working with the city to bring the landfill up to State and Federal standards.

Status (August 30, 1990): The landfill is estimated to reach capacity in mid-1991, when it is scheduled to be closed. The city has prepared a closure plan for the landfill, which includes a surface water drainage control system, landfill gas control system, leachate collection system, and a cap.

For more information about the hazardous substances identified in this narrative summary, including general information regarding the effects of exposure to these substances on human health, please see the Agency for Toxic Substances and Disease Registry (ATSDR) ToxFAQs. ATSDR ToxFAQs can be found on the Internet at ATSDR - ToxFAQs (http://www.atsdr.cdc.gov/toxfaqs/index.asp) or by telephone at 1-888-42-ATSDR or 1-888-422-8737.

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