EPA ID# WAD980722839
EPA Region 10
King County

7th Congressional District

Other Names:
Last Update: May, 2010

Hide details for Site DescriptionSite Description

Harbor Island is a 400-acre industrial island located in Puget Sound at the mouth of the Duwamish River on the southern edge of Elliott Bay. The island was created around 1905 from sediments dredged from the Duwamish Waterway. Since 1912, the island has been used for commercial and industrial activities, including secondary lead smelting, shipbuilding and repair, bulk petroleum fuel storage, metal fabrication, and containerized cargo shipping. Warehouses, laboratories, and other buildings are located on the island. There are no residences on Harbor Island, but approximately 10,000 people live within one mile of the site. All these residents receive their water from the Seattle public water supply system. Fishermen use the waters around Harbor Island for shellfishing, crabbing, and fishing.

Site Responsibility: This site is being addressed through federal, state and potentially responsible parties' actions.

NPL Listing HistoryDates
Proposed Date:12/30/1982
Removed Date:
Withdrawal Date:
Final Date:09/08/1983
Deleted Date:

Hide details for Threats and ContaminantsThreats and Contaminants

Media Affected: Groundwater, Soil & Sludges, Sediments, Environmentally Sensitive Area
The groundwater contains benzene, ethylbenzene, xylene, mercury, cadmium, lead, and zinc. However, groundwater under Harbor Island is not used as a source of drinking water. The soils are contaminated primarily with heavy metals, polychlorinated biphenyls (PCBs), and petroleum. Sediments near the island are contaminated with heavy metals, polycyclic aromatic hydrocarbons (PAHs), tributyl tin (TBT), and PCBs. There is potential for individuals to be exposed to site contaminants through direct contact or incidental ingestion of soils, seafood, or sediments. The site is located in an estuary, an important habitat for wildlife.

Show details for Cleanup ProgressCleanup Progress

Hide details for Regional ContactsRegional Contacts

SITE MANAGER(S):Ravi Sanga (Soil/Groundwater and East Waterway)
E-MAIL ADDRESS:sanga.ravi@epa.gov
PHONE NUMBER:206-553-4092

Karen Keeley (West Waterway)

Lynda Priddy (Shipyards)
E-MAIL ADDRESSsengupta.caryn@epa.gov
PHONE NUMBER:206-553-1275
Information pertaining to this site is housed at the following location(s):
EPA Region 10 Superfund Records Center (Administrative Records)
1200 Sixth Avenue, ECL-076
Seattle, WA 98101