Bothell Riverside TPH
NE 180th St & Woodinville Dr Sr 522, Bothell, WA 98011


In 2009, the Washington State Department of Ecology (Ecology) and the City of Bothell (City) entered into a legal agreement (called an agreed order) to conduct a Remedial Investigation (RI) and Feasibility Study (FS) of the site. The RI identifies the nature and extent of contamination, and the FS evaluates cleanup alternatives and identifies a preferred cleanup alternative.

The RI found contamination in two separate and distinct areas of the site:

* TPH Area (Total Petroleum Hydrocarbons)
* HVOC Area (Halogenated Volatile Organic Compounds)

Within the TPH Area, contaminated soil was removed in 2010 and 2017 as part of early cleanup efforts. No cleanup efforts are needed there any longer.

In order to allow the City to develop the cleaned-up TPH Area, Ecology and the City plan to replace the existing 2009 agreed order with two agreed orders; one for the TPH Area and one for the HVOC Area.

Ecology will issue these new agreed orders for public review in the near future. Stay tuned to this page for updates on the availability of the agreed orders.

Please click on the photo for a larger view


The City of Bothell (Bothell) owns the property at Woodinville Drive (SR 522) and NE 180th Street, Bothell (King County Tax Parcel No. 082605-9120, 082605-9284, and 082605-9031). Bothell acquired the property from Best Western Inn in 1990. The site is currently used for parking and storage of City materials.

The site contained a former gasoline service station.  An environmental study in 2008 documented the presence of petroleum contaminants in the soil as well as chlorinated solvents in the ground water at levels of potential concern.  Petroleum impacted soil and ground water were found chiefly at the northwestern portion of the property boundary. 
The City conducted a first interim action in 2010 under the first amendment to the Agreed Order.  The City excavated and properly disposed of the petroleum contaminated soil off site.  Soil samples collected at the limits of the excavation confirmed that the petroleum contamination which was the subject of the first interim action was removed.

This second proposed interim action will prevent the solvent contaminated groundwater from flowing into Sammamish River.


For a complete list of documents please see "View Electronic Documents" on the right.


Map showing site location as King County, WA SITE INFORMATION


View Electronic Documents

Cleanup Site Details Report

Facility Site ID: # 53578168

Cleanup Site ID: 6240

Bothell, King County

Status: Cleanup Started   Get definitions of Status terminology

Sunny Becker
Site Manager
(425) 649-7187

Jerome Cruz
Project Lead

Brad Petrovich
Public Involvement Coordinator
(425) 649-4486

Document Repositories:

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

King County Bothell Regional Library
18215 98th Ave NE
Bothell, 98011

Bothell City Hall
18415 101st Ave NE
Bothell, 98011