Ghera Property – Soil & Groundwater Investigation
Arcata, CA

EBA performed a soil and groundwater investigation for the Ghera property in Arcata, California.  The purpose of this investigation was to assess the soil and groundwater impacts from a former dry-cleaning business at the project site.

After performing initial site characterization work, EBA prepared a Report of Investigation (ROI) which detailed that the dry-cleaning chemical, tetrachloroethene (PCE), had impacted soil and groundwater along the western boundary of the property.  EBA recommended the installation of groundwater monitoring wells to allow for the verification of groundwater flow direction and gradient, as well as allowing for long-term monitoring of groundwater impacts over time to evaluate the rate of attenuation along with fate and transport.  The ROI was approved by the North Coast Regional Water Quality Control Board (NCRWQCB).  EBA then prepared an interim remedial measure work plan to conduct a dual-phase extraction pilot test which was subsequently approved by the NCRWQCB and implemented with successful results.

EBA was then tasked with conducting further environmental work at the request of the NCRWQCB due to the impacts of PCE on the local soil and groundwater which was identified in EBA’s ROI.  Further site characterization work is currently being conducted, which includes a sensitive receptor survey, passive soil gas survey, plume delineation, and additional soil vapor and groundwater well installation.  The data collected from these activities will be utilized to engineer a full-scale remedial action plan.