EPA ID# WA1170023419
EPA Region 10
Kitsap County

1st Congressional District

Other Names: Naval Undersea Warfare Engineering Station, Keyport Torpedo Station, Naval Undersea Warfare Station (4 areas)
Last Update: April, 2010

Hide details for Site DescriptionSite Description

The Naval Undersea Warfare Center (NUWC) Division, Keyport was acquired in 1913, to develop a still-water torpedo testing range. The 340-acre site is located on a peninsula 15 miles west of Seattle, Washington. The Center's activities include the maintenance of torpedoes, fuel storage, welding, painting, carpentry, plating, and sheet metal work. Historical activities that have contributed to the contamination include plating, painting, torpedo fuel sump leakage, landfilling a marsh, sludge disposal, and cross connections of drain lines to the shoreline. The base has downsized its industrial operations and is currently a research and test facility in support of undersea warfare programs. There are approximately 1800 people who work at the base.

Site Responsibility: This site is being addressed through federal actions. The Navy is the lead agency for the cleanup at Keyport. The State of Washington Department of Ecology is the lead regulatory agency.

NPL Listing HistoryDates
Proposed Date:06/10/1986
Removed Date:
Withdrawal Date:
Final Date:10/04/1989
Deleted Date:

Hide details for Threats and ContaminantsThreats and Contaminants

Media Affected: Soil, Groundwater & Sediments
Soils, sediments, and groundwater are contaminated with polychlorinated biphenyls (PCBs), petroleum hydrocarbons, heavy metals, and VOCs. Soils with petroleum contamination are being remediated as independent actions. People may be exposed to contaminants through direct contact with or ingestion of contaminated groundwater, sediments, and soils. Contaminants identified in shellfish include PCBs, semi-VOCs, and metals. The ingestion of bioaccumulated contaminants in the shellfish may pose a future health risk. At the request of the Suquamish Tribe, ATSDR conducted a health consultation on ingestion of shellfish from OU 1 and OU 2 beaches. ATSDR determined that the shellfish do not now contain chemical contaminants at levels of health concern. Liberty and Dogfish Bays have been closed (by the State Department of Health) to shellfishing since 1991, due to high fecal coliform counts (from boater sewage, septic, and other non-point sources).

Hide details for Cleanup ProgressCleanup Progress

The remedial investigation and feasibility study focuses on the cleanup of:
Area 1 - the station's on-base landfill
Area 2 - Van Meter road spill/drum storage area
Area 3 - Otto fuel leak
Area 5 - Sludge disposal area
Area 8 - Plating facility waste/oil spill area, and
Area 9 - Liberty Bay outfall/shoreline

In an interim removal action, soils contaminated with plating shop metals were excavated from accessible areas outside the old base plating facility (Area 8) in 1992.

The original remedial investigation and feasibility study for these six areas were
complete in 1993. However, in 1994 it was concluded that the landfill (Area 1) needed more study and should be separated into Operable Unit (OU) 1, to allow the other areas to progress in a timely manner. The remaining areas then became OU 2. The Record of Decision for OU 2 was signed in September of 1994.

Actions were selected to address the contaminants found in the areas of OU 2. For Area 2 monitoring is continuing to confirm that no long-term risk develops. Monitoring of groundwater began in 1995. Area 3 was determined to require "No Further Action". Additionally sampling in areas 5 and 9 in 1995 confirmed that these two areas needed "No Further Action." Remedial activities conducted at Area 8 included demolition of the plating shop building, removal and disposal of metal-contaminated soil, and demolition and associated total petroleum hydrocarbons-impacted soil removal of several underground storage tanks. Remediation efforts began in fall 1998, and the soil removal was completed March 1999. For Area 8, long-term monitoring of groundwater, sediments, and shellfish tissue, which began in 1995, continues. Orders implementing the necesary institutional controls for all areas of the Base are being developed.

Further investigation and feasibility studies were completed for OU 1, the landfill, in 1997. The on-site unlined landfill is built on a salt marsh and is in contact with the groundwater. The chemicals of concern are chlorinated aliphatic hydrocarbons (CAHs – a specific group of VOCs), and Polychlorinated Biphenyls (PCBs) in sediments and groundwater. A proposed plan was released for OU 1 in November 1997. The Record of Decision was signed for OU 1 in September 1998. Major components of the selected remedy include phytoremediation (using poplar trees) to treat CAH hot spots in the landfill, removal of PCB-contaminated sediments, long term monitoring and institutional controls.

The sediment removal from the marsh stream and the concurrent upgrade of the marsh tide gate were completed in October 1999. The phytoremediation began in April 1999, and was completed installed by May of 1999. The June-September 2001 Phytoremediation Status Report concluded "the tree roots appear to have reached the capillary fringe of the shallow acquifer beneath the landfill and have begun drawing their water from the aquifer." This site was designated "construction complete" on June 27, 2000.

Hide details for Regional ContactsRegional Contacts

SITE MANAGER(S):Chung Ki Yee (state)
PHONE NUMBER:360-407-6991

Nancy Harney (EPA contact)
PHONE NUMBER:360-396-2699
Information pertaining to this site is housed at the following location(s):
Engineering Field Activity Northwest (Administrative Record)
Naval Facilities Engineering Command
19917 7th Avenue NE
Poulsbo, Washington 98370-7570
(360) 396-0034

Public Information Repository (Reports only)
Kitsap Regional Library
1301 Sylvan Way
Bremerton, WA

Public Information Repository (Reports only)
Poulsbo Branch Library
700 NE Lincoln
Poulsbo, WA