Case study

PCE and TCE in the groundwater

An industrial metal fabrication facility, where the groundwater was contaminated surface release of used degreasers containing perchloroethylene (PCE), trichloroethane (TCE), and other industrial solvents. Both overburden and bedrock aquifers were impacted. Assessment of the site indicated that the two are in hydraulic community. Prior to treating this site with Oppenheimer Biotechnology products the owner had tried for eight years and over five million gallons of traditional pump and treatment remediation. This method had NOT reduced contaminant concentrations to state standards and also meant that the site could not be closed.

Thirty‐two (32) inoculation points were driven to the bedrock surface and set with 1/2 inch PVC well screen. The points were arranged in a grid pattern from up-gradient of the known extent of contamination to the property boundaries. The microbial products were mixed with nutrients, biocatalyst, and injected into the points and the impacted monitoring wells.



Concentrations of PCE and TCE declined at an average rate of 50% each quarter. In the most contaminated area, concentrations were reduced from 120 to 28 ug/L in six months. In a less contaminated area, concentrations declined from 77 to 11ug/L. Site closure happened within the projected timeline. 18 months from the time of initial inoculation.

Actual Time Frame – 18 months.

Other Case Studies

These case studies are only intended to represent a cross section of sites where our family of Oppenheimer products have been used. It is to demonstrate the diverse range of contaminants that can be successfully and effectively bioremediated by our products and applications.