Case Study: Solvent-Impacted Groundwater RI/FS

Client: Lewis County Location: Lewis County, WA Contact for environmental projects: Doug Hillman

Project Background & Challenges

Lewis County is under an Agreed Order to conduct a Remedial Investigation/Feasibility Study (RI/FS) in response to chlorinated solvents discovered in a water supply well. The County required technical support to identify the source of the solvents, to acquire remedial action grant funding, and to implement interim remedies.

Solution

Aspect has managed all phases of this project, which involved evaluating the extent of off-site groundwater impacts by identifying drinking-water supply wells in the area. Additional remedial investigation activities included conducting geophysical and soil gas surveys, and characterizing the source area using direct-push sampling techniques, groundwater monitoring wells, and aquifer testing.