City Services

Downtown Contaminated Soil and Groundwater Clean Up

Project Description

This project is a component of Bothell's Downtown Revitalization Plan and is identified in the Capital Facilities Plan as T47. The environmental assessment and cleanup of several contaminated downtown Bothell city-owned properties needs to occur prior to their redevelopment. Since early 2008, the City has implemented environmental assessment efforts which entail conducting historic research and field investigations aimed at determining the presence, nature and extent of contamination in soil and/or groundwater on the various properties. This assessment work was followed by cleanup work in summer 2010.

Four contaminated parcels lie along the pathway of the new Crossroads roadway alignment.  Three of these are under Agreed Orders with the Department of Ecology, while one is under a Cooperative Agreement with the U.S. Environmental Protection Agency (EPA). In the northern part of downtown, the City cleaned up another contaminated property in the area formerly occupied by the Northshore School District’s (NSD) Bus barn and transportation/maintenance facility.

The City has secured some grant funding and assistance to perform this work, including:

  • A $3,520,000 Remedial Action Grant from the Department of Ecology for assessment and cleanup of the three Agreed Order sites (Bothell Landing, Bothell Riverside and Bothell Paint & Decorating).  Ecology will pay for 50% of eligible costs incurred by the City up to $3,520,000, and
  • A $200,000 Brownfields Cleanup Grant from the U.S Environmental Protection Agency’s (EPA) to clean up the Bothell Landing site.
  • The King County Brownfields Program also continues to assist the City by conducting environmental investigations to better understand groundwater impacts caused by former dry-cleaning businesses in the downtown area.  This work was funded by an EPA Brownfields grant.

Updated May 25, 2016

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News & Project Updates

June 2014: Wyser Construction Company, Inc. was the apparent low bidder for the Block O Cleanup Project.  See the final bid tab here.

May 2014: Block O Cleanup Project Environmental Documents.  Click here.

March 2013: 30-day Public Comment period for Riverside Agreed Order Amendment #2.  The City is to conduct an Interim Action at Riverside, consisting of pumping and treating contaminated (solvent-impacted) groundwater.  See Ecology website for more information.

February 2013: 30-day Public Comment period for the Ultra Custom Care Cleaners Agreed Order completed.  City has entered into a new agreement with Ecology to investigate and clean up this former dry-cleaner site.  See Ecology website for more information.

Spring 2013: the King County Brownfields Program (KCBP) again assisted the City with investigation of the solvent plume just up-gradient of the Riverside MTCA site.  In summer 2011, KCBP conducted environmental assessment work consisting of drilling activities and field investigations on several properties located south of the City Hall block.

Contaminated soil cleanup work on the Crossroads sites: The second round of cleanup (under existing SR 522 highway) will be conducted after traffic is shifted to the newly realigned roadway in August 2013 (Crossroads Phase III).  The first cleanup phase was conducted in summer 2010.

Building demolition and soil cleanupThis work at the former NSD Transportation Facility was conducted in fall 2010.

Project Documents

Contact Us

If you have a question or comment about this project, we'd like to hear from you.

Nduta Mbuthia
Senior Civil Engineer