Former industrial activities at an active manufacturing plant resulted in chlorinated solvents groundwater contamination with an extended plume of PCE and TCE, with very little presence of daughter compounds, due to the aerobic conditions of the aquifer. As the source area was not accessible due to ongoing industrial activities on the site, voluntary remediation activities took place in the plume, located in areas external to the buildings.
A pilot trial was performed on the site in 2012, during which a combination of 3-D Microemulsion (3DMe® ) and Hydrogen Release Compound Primer (HRC Primer® ) electron donors were injected into an existing monitoring well. Results were measured from down-gradient monitoring wells and showed successful treatment of the contaminants of concern, after which full scale remediation activity was carried out via other existing wells using the same mixture of 3DMe and HRC Primer as in the pilot trial.
The application was performed by injecting 3DMe and HRC Primer together under pressure into 5 wells using a packer system. Application activities took place at the end of 2013 and monitoring is ongoing.