Remedial Investigation for Gasoline Leak, Smitty’s Conoco, Kennewick, WA; R.H. Smith Distributing


Remedial Investigation for Gasoline Leak, Smitty’s Conoco, Kennewick, WA; R.H. Smith Distributing

White Shield provided a Hydrogeologist and Project Manager for the investigation and remediation of a 6500- gallon gasoline leak at a service station in Kennewick, Washington. The site is within the Wellhead Protection Area for one of the City’s municipal drinking water wells. To date the investigation has included sampling of soils in trenches used for fuel distribution lines, the installation and sampling of four groundwater-monitoring wells to determine if groundwater was impacted by the release, and the design and installation of a product recovery system to recover floating product found on the groundwater. Two of the wells were constructed as 4 inch wells to facilitate floating product removal. White Shield’s Project Manager designed a state-of-the-art product recovery system, using a floating skimmer and pump that will remove floating product but will not capture water should the water level rise above the intake of the skimmer. The system is automated to maintain 24-hour operation. Additional support included the installation and sampling of three additional groundwater-monitoring wells at the site to further delineate the extent of the groundwater plume. All work is being coordinated with the City of Kennewick, the Washington State Department of Ecology, and the insurance carrier for R.H. Smith Distributing.