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Current fact sheet | Tờ Thông Tin Hiện Tại | Ficha descriptiva vigente Terminal 117 BackgroundTerminal 117 (T-117) is a property on the west bank of the Lower Duwamish Waterway owned by the Port of Seattle (Port) in the South Park neighborhood of Seattle. It's part of the Lower Duwamish Waterway Superfund Site. The Environmental Protection Agency (EPA) selected T-117 for early cleanup because the river bank and sediment in the waterway in this area have high concentrations of PCBs (polychlorinated biphenyls) in comparison to some other areas of the Duwamish. Polychlorinated biphenyl manufacturing was banned in the 1970’s because the chemicals stay in the environment for a long time and are suspected of causing cancer and other health problems in people who are exposed to the chemicals for a long time. The T-117 cleanup area covers about 6.4 acres and includes the river bank and sediments, the Port-owned land next to the river (upland area), and a small area along the streets next to T-117 (see the Gallery for maps and aerial photographs of the area). The City of Seattle is partnering with the Port to clean up the area. Portions of the T-117 Upland Area were historically used for manufacturing asphalt products. By 1997 asphalt manufacturing at the site stopped and the Malarkey Asphalt Company decommissioned tanks and equipment and removed contaminated soil from discrete locations (hot-spot removals). In 1999, the Port acquired the former Malarkey property. As part of the transaction the Port, under EPA oversight, cleaned up additional PCB contamination in the soil. In addition to the 1999 cleanup, the Port has also conducted the following cleanup activities:
In the area of the streets, the City took several interim cleanup actions to protect the public from coming into contact with PCBs in the streets near T-117 until the contamination could be permanently removed. These actions took place at various times from 2004 to 2006. The City removed surface gravel and replaced it with clean gravel, paved over some contamination, swept and pressure-washed some street areas and installed a temporary stormwater collection and treatment system. The City also cleaned up PCBs in two residential yards on 17th Avenue South. What's happening now?The Port and City are now working on a permanent cleanup of PCBs on the T-117 property and streets to protect people and the environment. This work incorporates extensive soil sampling and other investigations to determine the cleanup area boundaries, appropriate cleanup actions, and to identify if there is a risk of recontamination from other sources once the cleanup is complete. The Port and City are currently developing a revised Engineering Evaluation/Cost Analysis (EE/CA) for the cleanup action at T-117. This document will:
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