Shenandoah, VA - DNAPL in clay at active facility - Case Study

Guaranteed Remediation of TCE and 1,1-DCE in Soil and Bedrock

Project Summary

TRS Group implemented an electrical resistance heating (ERH) remedy to remove trichloroethylene (TCE) in overburden soil surrounding a former dry well located at a manufacturing facility in Shenandoah, Virginia. TCE soil concentrations were measured at levels that were indicative of separate-phase liquid. Initial mass-in-place calculations estimated that there were
approximately 22,000 pounds of TCE in the subsurface, and 55,000 were removed, TRS only used approximately 80% of the estimated energy to complete the remediation. The remedial goal was to reduce TCE concentrations to below an average of 2.1 mg/kg.

Background

The site was an active parts manufacturing facility and previous owner from 1965 to 1990 produced small electronic components, The cleanup standard for the remediation was developed to remove the contaminant source from the soil which would in turn decrease the size and lifespan of the offsite dissolved phase groundwater plume.