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Lower Duwamish Waterway Source Control InvestigationGlacier Northwest, Inc. - Reichhold, Inc. Site
Site LocationThe Glacier Northwest, Inc. site is generally located at 5900 West Marginal Way SW., Seattle, Washington (See figure included). This is an industrial area located just south of Duwamish Shipyard. Terminal 115 is immediately to the south; West Marginal Way SW is immediately to the west. The eastern portion of the property is adjacent to the west bank of the Lower Duwamish Waterway. The Glacier Northwest, Inc. site includes an upland area as well as some sediments, or mud, in the Lower Duwamish Waterway that are contaminated. The final site boundaries will be defined by the extent of contamination. Site BackgroundGlacier Northwest, Inc. currently owns the property that was formerly operated by Reichhold, Inc., a chemical product manufacturer and distributor. This property has had a variety of past industrial operations and uses. From 1940 to 1943, activated charcoal was manufactured for the U.S. Army at the site. The Army then purchased the land in 1943. From 1947 to 1961, Reichhold, Inc. leased the land from the Army, manufactured resin glues for plywood; and operated a pilot plant for pentachlorophenol and sodium pentachlorophenate production until approximately 1958. In 1964 the Port of Seattle purchased the property. Kaiser Cement Corp. leased the property from the Port and stored and distributed cement. Kaiser bought the property in 1969. In 1987 Lone Star Industries, Inc. bought the property and eventually changed their name to Glacier Northwest, Inc. The facility was continually used for cement storage and distribution. Between 2000 and 2002 Glacier mixed and distributed batches of concrete. Glacier currently operates a cement storage and distribution facility on the property. ContaminationContamination at the site is the result of historical uses and practices including manufacture of pentachlorophenol, glues and resins. The contaminants of concern have not been completely identified, however, initial sampling found metals and phenols including arsenic and pentachlorophenol in soil, pentachlorophenol and arsenic in groundwater, dioxins in sediment, and arsenic in surface water seeps. Previous Cleanup WorkDissolved arsenic in groundwater was treated using an oxidative process where hydrogen peroxide was injected into the saturated zone. The hydrogen peroxide was expected to result in geochemical fixation of the arsenic. Injections were applied February/March of 2000 and July/August 2000. Reductions of arsenic in groundwater concentrations were noted in post-treatment sampling; however samples collected in 2003 reported concentrations that were observed above MTCA Method C levels for arsenic in groundwater within the treatment zone and one well at the Site outside the treatment zone. Pentachlorophenol in groundwater was treated using in-situ ozonation. The ozone system utilized air sparging to inject ozone. Air sparging is the introduction of air under pressure below the water table. The system was installed in March, 2000 with groundwater treatment beginning in May, 2000. Initially large reductions in pentachlorophenol concentrations were observed although eventually rebounding occurred. After the ozonation system was turned off for compliance monitoring, eventual rebounding occurred in two wells. Additional ozone injections were performed and groundwater concentrations were observed above MTCA Method C levels for pentachlorophenol for one well at the Site. The system operated almost continuously for six years. Agreed OrderEcology is entering into a new Agreed Order for this Site with Glacier Northwest, Inc, and Reichhold, Inc. Ecology and the potentially liable persons (PLPs), Glacier Northwest, Inc. and Reichhold, Inc., have negotiated a legal agreement called an Agreed Order that formally describes their working relationship. Under the Agreed Order, the PLPs will conduct a Remedial Investigation (RI) and Feasibility Study (FS) at the Site. The Remedial Investigation and Feasibility Study are required under the Washington Administrative Code (WAC) 173-340-350 and are part of the cleanup process for this Site. The RI will determine the nature and extent of contamination in the upland area soil, groundwater, stormwater and stormwater solids, seeps and sediments. The FS will use the results of the RI to evaluate and select cleanup action alternatives for the Site. Cleanup actions might be identified during the RI that will eliminate or minimize current releases of contamination to Lower Duwamish Waterway sediments or that are necessary to prevent an imminent threat to human health or the environment. Ecology will consider implementing such cleanup actions as interim actions under the existing Agreed Order Site DocumentsJune 2009 Public Comment Period for the draft Agreed Order, Scope of work and draft Public Participation Plan is June 18 through July 18 Related Information
Additional Resources
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Facility Site ID:
# 23881883 |
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