Historic leakages at an active manufacturing facility in Northern Italy resulted in the underlying groundwater becoming impacted with hexavalent chromium (Cr(VI)) contamination of up to 2,000 μg/L, and chlorinated solvents (CHC) concentrations of up to 10,000 μg/L. 3-D Microemulsion® (3DMe) and Metals Remediation Compound (MRC®) were selected to remediate the site because of:
The site was split into a number of zones, which have been treated in phases. For the source zone, 3DMe and MRC were injected into 16 wells on a 3m x 3m grid, providing a targeted treatment of the most impacted part of the site at a depth of 5 to 9 mBGL.
The plume was then addressed through the use of a 3DMe and MRC barrier, which stopped the migration of the contaminant plume offsite, without affecting the groundwater ow itself. The application was completed through 8 xed, multi-level wells installed from 5 to 25mBGL. Since this injection, further areas of the site have become accessible and future applications are planned.