Combined in situ sorption and biological degradation leads to site closure of large manufacturing site in Northern Italy

Chlorinated solvents were used for many years at a former manufacturing facility in Northern Italy. This resulted in contamination of the groundwater underlying a large proportion of this 60,000 m2 site. Groundwater concentrations of up to 155,000 μg/L TCE meant there was a suspected presence of Dense Non Aqueous Phase Liquid (DNAPL) on parts of the site. The contamination posed an unacceptable risk to both on- and off-site receptors and it was determined that active remediation was required on a large proportion of the site.

Remediation Strategy:

REGENESIS created a strategy comprising Enhanced Reductive Dechlorination (ERD) tailored to contaminant concentrations and local geology, across the entire impacted area. This strategy was coupled with an injectable Permeable Reactive Barrier (i-PRB) at the site boundaries. This in situ remediation approach proved to be successful, leading the site to closure after having reached stably very stringent concentrations (VC<0.5 μg/l; TCE<1.5 μg/l) and obtaining up to 6 orders of magnitude reduction in concentrations.

Suite of REGENESIS products applied for ERD: 3-D Microemulsion®, HRC®, HRC-X®, HRC Primer®.
Injectable Permeable Reactive Barrier : PlumeStop®Liquid Activated Carbon(CAC)

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