9061 Seward Park Ave S, Seattle, WA 98118


Ecology invites you to review and comment on the Periodic Review for the Lakeshore Village Apartments Site.


A periodic review is conducted every five years following a cleanup action when institutional controls are used as part of the remedy, as required by the Model Toxics Control Act (MTCA). The purpose of the periodic review is to evaluate current site conditions and to ensure continued protection of human health and the environment.


The 2019 Periodic Review concluded that the cleanup actions completed at the Site appear to be protective of human health and the environment.

Ecology will review comments received during the comment period and make recommendations for suggested changes. The periodic review will become final if no significant changes are made.

Submit your comments on-line at or mail to Tamara Welty at 3190 160th Ave SE, Bellevue, WA 98008.

Lakeshore Village Apartment
Please click on the photo for a larger view


The Lakeshore Village Apartments Site (currently known as Lake Washington Apartments) is located at 9061 Seward Park Avenue South, Seattle, Washington. The property consists of a low income housing development first constructed in 1948. The property covers approximately 16.5 acres and includes 34 buildings with 366 residential apartments. The housing development underwent renovation in the mid-1990’s.




Part of the renovation process in the mid-1990s included removal of heating oil underground storage tank (UST) systems next to the apartment buildings. Diesel contaminated soil was identified and removed from 9 of the 18 UST locations. Contaminated soil was left in place at 4 of the UST locations, where either buildings or buried pipes were in danger of being undermined, or other structural hazards were found.





The 2010 Periodic Review concluded that groundwater had not been investigated and therefore the soil-to-groundwater pathway could be a concern. The 1998 No Further Action (NFA) determination was rescinded by Ecology in April 2010 since groundwater may have been impacted.


In 2012, groundwater sampling was conducted near the 4 UST locations where soil contamination remained. Only one of the groundwater samples, which was collected near building 35, had a diesel range total petroleum hydrocarbon concentration exceeding the groundwater cleanup level. Three groundwater monitoring wells were installed in the vicinity of building 35. Groundwater monitoring results indicate that contaminated groundwater is contained within the property boundary and is not migrating off the property.





A NFA determination was issued by Ecology’s Voluntary Cleanup Program (VCP) in June 2013. A new Environmental Covenant was recorded with King County that supersedes the 1998 Restrictive Covenant. An Environmental Covenant restricts activities that might result in exposure to the contaminants. No additional cleanup actions were determined to be necessary. Confirmational groundwater monitoring is required every five years to confirm the long-term effectiveness of the cleanup action.


To see if electronic documents are available for this site, click “View Electronic Documents” in the right-hand column. Click for instructions on how to submit a public records request.

Check out What’s In My Neighborhood to find out about other cleanups in your area. 


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 2285

Cleanup Site ID: 2050

Seattle, King County

Status: No Further Action   Get definitions of Status terminology

Comment Period:
FEBRUARY 13, 2020 - MARCH 13, 2020

Tamara Welty
Periodic Review Coordinator
(425) 649-7023

Document Repositories:

Northwest Regional Office
3190 160th Ave SE
Bellevue, 98008-5452