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Terminal 117 (T-117), a Port property on the Lower Duwamish Waterway (LDW) in the Seattle's South Park neighborhood, is a contaminated Superfund site that has been identified by the Environmental Protection Agency (EPA) and the Department of Ecology as a site for Early Action cleanup. T-117 was for selected for Early Action cleanup because river sediment offshore of the terminal has higher concentrations of PCBs (polychlorinated biphenyls) than other areas of the LDW.
Prior to its acquisition by the Port, portions of this site were used for asphalt manufacturing. By 1997, the asphalt manufacturing plant was decommissioned, however soil contaminated with oil and PCBs remained. In 1999, the Port acquired the site in a transaction to enable portions of the property to be cleaned up. An emergency Superfund Cleanup Action was conducted by the Port with EPA oversight to remove soil contaminated with PCBs. After this cleanup, the property became know as T-117.
Since the Port's acquisition cleanup projects have included:
In 2003, T-117 the sediment, immediately offshore of the property, was selected as an Early Action cleanup site within the LDW, primarily due to elevated concentrations of PCBs. The Port and City of Seattle have conducted several sediment, soil and groundwater investigations to determine the extent of contamination. As part of the Early Action cleanup, the Port and the City are currently working together to cleanup the sediment offshore of the property, the T-117 property and the City's adjacent streets. The cleanup is anticipated to begin in late 2009 or early 2010. Learn more about the T-117 Early Action cleanup progress here.
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In 1999 the Port acquired the former Malarkey Asphalt Company property and will begin cleaning up the site this fall with EPA supervision.