In-Situ Chlorinated Solvent Treatment Protects Municipal Drinking Water

Case study highlights:

• Remediation solution from REGENESIS protects municipal water pumping station from chlorinated solvent contamination
• Following injection the PCE was rapidly degraded by 99.98%
• Long term monitoring shows that no rebound in parent or daughter contaminant concentrations has occurred

This case study reviews a site in Sweden where a single injection of REGENESIS controlled release electron donor technology resulted in the degradation of the contaminant plume and protection of a downgradient drinking water pumping station. Environmental consulting firm RGS Nordic worked with REGENESIS to design an in situ remediation solution for the chlorinated solvent plume. In situ remediation using Enhanced Reductive Dechlorination (ERD) was chosen to provide the most cost-effective solution for the groundwater plume. Prior to application, the contaminant plume primarily consisted of PCE with a small amount of daughter products. Following injection the PCE was rapidly degraded by 99.98%. All daughter products were degraded sequentially and the presence of ethene showed that full reductive dechlorination had occurred.