A.82 Wyckoff-Eagle Harbor, WA

A.82.1 Contacts

Chung Ki Yee
State of WA DOE
360-407-6991
[email protected]

 

Howard Orlean
USEPA Region 10
206-553-2851
[email protected]

A.82.2 Summary

Environment:	Subtidal and intertidal areas
Scale:	Full
Contaminants of Concern:	Creosote, pentachlorophenol, various polycyclic aromatic hydrocarbons, and heavy metals
Final Remedy:	Capping, MNR, and institutional controlsNon-engineered instruments, such as administrative and legal controls, that help minimize the potential for human exposure to contamination and/or protect the integrity of the remedy.

A.82.3 Site Description

The Wyckoff-Eagle Harbor Superfund site is located off the east side of Bainbridge Island, Washington. Due to operation of the former Wyckoff wood-treating facility and a former shipyard, the area was added to the USEPA’s Superfund National Priority List (NPL) in 1987.

A.82.4 Remedial Approach

Final selected remedy: Capping, MNR, and institutional controls

In 1993 and 1994, USEPA capped a 54-acre subtidal hotspot area as part of a non-time-critical removal action. In September 1994, USEPA issued a ROD which called for monitoring and maintaining the existing sediment capA covering over material (contaminated sediment) used to isolate the contaminants from the surrounding environment., and cappingTechnology which covers contaminated sediment with material to isolate the contaminants from the surrounding environment. remaining subtidal areas of concern, monitoring the success of natural recovery in intertidal areas, enhancing existing institutional controls to reduce public exposure to contaminated fish and shellfish, long-term monitoring of the sediment cap, and demolishing in-water structures. The additional capping involved 15 acres in a nearshore area and intertidal area and was conducted in 2000-2001. In 2002, 50,000 yd³ of clean upland borrow material was placed in shallow subtidal and intertidal areas to create intertidal habitat and to form a continuous intertidal beach along the Eagle Harbor shoreline.

A.82.5 Monitoring

RAOs/project objectives achieved? Three five-year reviews of the site have been conducted with the most recent (USEPA 2014) concluding that the remedy continues to function as intended. The area of the subtidal cap within a ferry navigation lane and an area (grid J9) that may not have been capped initially show less than target cap thicknesses, but otherwise, the cap thickness is stable. Prior to remediationThe act or process of abating, cleaning up, containing, or removing a substance (usually hazardous or infectious) from an environment., 80% of harbor English sole exhibited toxicopathic liver lesions but sampling between 2000 and 2002 found a significant decreasing trend in biliary fluorescent compounds and significantly decreased lesions (Myers et al. 2008). Recent passive sampling efforts (Thomas, Lu, and Reible 2012) showed no evidence of contaminant migration through the cap except potentially in the area J9 that was identified in the third five year review as having a cap of less than target thickness and which may not have been capped during the remedy implementation.

The intertidal cap areas remain within target thickness, show effective contaminant isolation of underlying contaminated sediments, and provide habitat, although 2011 sampling indicated some potential PAH exposure near shore and beach areas where potentially mobile NAPL has been noted.

A.82.6 References

USEPA. Wyckoff Eagle Harbor Superfund Site, USEPA Region 10, last updated August 2014, http://yosemite.epa.gov/R10/CLEANUP.nsf/2ae189540953f4038825777b007b9e3a/62575003bd4e619088257a7e00802c50!OpenDocument.. 

Eagle Harbor Wyckoff, State of Washington, Department of Ecology, https://fortress.wa.gov/ecy/gsp/Sitepage.aspx?csid=2683.

Publication Date: August 2014