This site was identified as having confirmed or suspected contamination that could harm people and the environment. Cleanup under the Model Toxics Control Act is now complete at the Site. More information about this site is available by clicking on the links in the right-hand column.


This site was cleaned up under the Voluntary Cleanup Program at Washington State Department of Ecology. The Voluntary Cleanup Program enables owners of contaminated sites to meet state cleanup standards independently and to receive technical guidance from Ecology during the process.

The Voluntary Cleanup Program enables owners to work on a contractual basis rather than under an Ecology legal order. Participants in the Voluntary Cleanup Program pay fees to Ecology to cover the department’s costs for guidance and review. Voluntary Cleanup Program sites must meet the same cleanup standards as properties formally managed by Ecology under the state’s cleanup law, the Model Toxics Control Act, created by a 1989 voter initiative.


Cleanup is complete at the Henry Bacon Building Materials Site (Site). The Site is located at 5210 E Lake Sammamish Parkway SE, Issaquah, 98029. Now, the Department of Ecology proposes removing (or delisting) the Site from the state’s Hazardous Sites List. The Hazardous Sites List is a statewide record of contaminated properties.

The cleanup addressed petroleum contamination in soil and groundwater. The proposal to remove (delist) the site based on Ecology’s draft No Further Action letter. This letter describes how the site was cleaned up and why Ecology believes cleanup is complete. More information about this site can be found on the box to the right.


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 8428648

Cleanup Site ID: 7791

Issaquah, King County

Status: No Further Action   Get definitions of Status terminology

Document Repositories:

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