Harbor Island Site Fact Sheet - September 5, 1996 | Region 10 | US EPA

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Harbor Island Site Fact Sheet - September 5, 1996

Superfund Fact Sheet

September 5, 1996

Harbor Island Site Seattle, WA

The U.S. Environmental Protection Agency (EPA) is proposing to remove a portion of the Harbor Island Superfund site from the National Priorities List. EPA and the Washington Department of Ecology have determined that as a result of a cleanup conducted at Lockheed Shipyard in 1995, this facility no longer poses a threat to public health and the environment.

This fact sheet explains the proposal to delete the Lockheed Shipyard facility as well as discusses activities occurring at the rest of the Harbor Island site.

Notice of Intent to Delete the Lockheed Shipyard Unit

A Notice of Intent to Delete has been published in the Federal Register on September 5, 1996. EPA is asking for your comments on the partial delisting proposal from September 5 until October 5, 1996. Written comments should be sent to:

Keith Rose, EPA Project Manager
U.S. EPA ECL-111
1200 Sixth Avenue
Seattle, WA 98101

The Lockheed Shipyard facility includes approximately 18.5 acres on the west side of Harbor Island. Shipbuilding activities since the mid-1930s included metal fabrication, sandblasting and painting. The facility was used by Lockheed to build and refurbish ships from 1959 to 1986. An investigation of the facility conducted by Lockheed Martin indicated that soil containing petroleum, lead, and arsenic exceeded cleanup goals in several areas. Cleanup activities, completed in the fall of 1995, included petroleum hot spot soil excavation and treatment by thermal desorption, capping other soil contaminated above the cleanup goals, and long-term monitoring of contaminant concentrations in the groundwater. Soil sampling and analysis show no significant risk to public health or the environment by residual levels of contamination remaining in the soil.


Harbor Island is located approximately one mile southwest of downtown Seattle, and lies at the mouth of the Duwamish River on the southern edge of Elliott Bay. Due to past industrial activities on the island, there are high levels of lead and other hazardous wastes present in the soils. In 1983, the Site was placed on EPA’s Superfund National Priorities List (NPL) requiring further investigation and possible cleanup.

For investigation and cleanup purposes, EPA divided the Site into four portions, known as “operable units”: 1) the Petroleum Tank Facilities; 2) the Marine Sediments; 3) the Lockheed Shipyard; and 4) the Soil and Groundwater unit, which covers the rest of the island. The Washington Department of Ecology is the lead agency for the petroleum tank facility.

Soil and Groundwater Unit Consent Decree

On August 6, the consent decree for the Soil and Groundwater Operable Unit was entered in court. The decree has been signed by 39 Potentially Responsible Parties who have agreed to implement the selected remedy. The estimated cost of the remedy is $35 million. The remedy includes: 1) excavation and either off-site disposal or on-site treatment of petroleum hot spot soil by thermal desorption, 2) disposal of PCB contaminated soil in an off-site hazardous waste facility, 3) removal and treatment of floating petroleum product and contaminated groundwater at Todd Shipyards, 4) capping exposed contaminated soil exceeding cleanup goals with three inches of asphalt, and 5) monitoring groundwater semi-annually for 30 years or until it is verified that the cleanup actions prevent contaminants from reaching the shoreline at concentrations which exceed the cleanup goals.

Marine Sediments Unit

In October 1995, EPA issued a proposed plan for cleanup of contaminated shipyard sediments at Harbor Island for public comment. EPA plans to make a cleanup decision for the shipyard sediments by the fall of 1996. Further studies are being conducted to determine how to best clean up the remaining contaminated sediments at Harbor Island.

For More Information

The Notice of Intent to Delete for the Lockheed Shipyard unit and all other decision documents for this site are available for your review in the Information Repository and should be consulted for in-depth details. The Information Repository is located at the EPA Records Center, 1200 Sixth Avenue, Seattle. Please arrange a time to look at the documents by calling the Records Center at (206) 553-4494.

Keith Rose, EPA Project Manager at (206) 553-7721
Krista Rave, EPA Community Relations Coordinator at (206) 553-6686
or toll free at 1-800-424-4372

For those with impaired hearing or speech, please contact EPA’s telecommunication device for the deaf (TDD) at (206) 553-1698. To ensure effective communication with everyone, additional services can be made available to persons with disabilities by contacting one of the numbers listed above.

Modificaitons on January 3, 2003: change the Point of Contact information.

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