In September 2009, the United States Environmental Protection Agency,
Region 10 (EPA) and the City of Bothell (City) entered into a
Cooperative Agreement under the Brownfields Program, to perform
environmental cleanup on a contaminated City-owned property in downtown
Bothell, referred to as Bothell Landing (site). This site is just one
of seven parcels that lie in the pathway of the new Crossroads roadway
alignment, which was cleaned up in August 2010, prior to planned roadway
construction and site redevelopment.
Under the Cooperative
Agreement BF - 00J02601 with EPA, the City was awarded a $200,000
Brownfields Cleanup Grant to perform cleanup work on the site. A
Brownfields site is defined by EPA as "real property, the expansion,
redevelopment or reuse of which may be complicated by the presence or
potential presence of a hazardous substance, pollutant or contaminant."
The scope of work outlined in the Cooperative Agreement work plan
included conducting cleanup planning activities, public involvement and
performing cleanup of soil and groundwater.
Cleaning of Soils
The site, which is
also under an Agreed Order with Ecology, was cleaned up during
Crossroads Phase 2 construction in August 2010. Cleanup consisted of
excavating contaminated soils and transporting them for disposal at a
licensed facility that handles hazardous materials. The excavation was
then treated with slurry to remediate the remnant soils and groundwater,
followed by back fill with clean material. Groundwater at the site was
monitored quarterly, by sampling newly installed monitoring wells for a
one-year period following the cleanup.