A widespread plume of chlorinated solvents has been monitored for more than a decade underneath a metropolitan area in Italy. The chlorinated solvent concentrations are low (100 μg/l) but persistent, with no effective natural attenuation occurring. This plume had previously been considered as practically untreatable, due to the low concentration, location and size. However, the creation of our PlumeStop technology allows for the effective treatment of widespread, low concentration plumes using a combination of in situ adsorption and enhanced biological degradation. This provides a rapid and sustained treatment to very low concentration targets from a single, simple and safe injection into the subsurface.
The intention on this site is to treat all of the accessible ‘hotspots’ present within the plume, with the first area being used as a pilot test to confirm dose and distribution.
Regenesis installed 6 multi-level injection wells and applied specific doses of PlumeStop at the target depths. On-site works were completed in 3 weeks and have included the execution of a range of tests and trials in order to obtain useful information for a detailed full scale design and a confirmation of of treatment effectiveness.