Description
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OVERVIEW
A chlorinated solvent plume (PCE) was migrating onto a commercial site
in Toronto area and a lending institution required mitigating measures
implemented. An in-situ approach was required due to the
proximity of the property boundary, on-site building and depth to water
table (~5 m). The dissolved concentrations of the compounds of concern
were:
The dissolved concentrations of the compounds of concern were:
- PCE (maximum concentration of 450 µg/L)
- TCE (maximum concentration of 47 µg/L)
- cis 1,2- DCE (maximum concentration of 50 µg/L)
- Vinyl chloride (maximum concentration of 12 µg/L)
SCOPE OF WORK
Acquired all relevant permits to complete the remediation program.
Designed and optimized an in situ program to maximize
treatment efficiencies.
Implemented a program that minimized impact to the Site given the
presence of buildings and property boundary.
THE VERTEX APPROACH
Reductive dechlorination.
Reactive Zone including:
- Permanent Injection Wells
- Temporary Injection Points
Eight permeable reactive zones.
Injection/placement of reactive compounds:
- >225 kg of EHC.
- >80 kg of EHC.-A
OUTCOME
Successful installation of a reactive zone.
Reductive dechlorination conditions created:
- Redox reductions of up to -175mV
- PCE decreased from 450 g/Lt o 60 g/L
- No vinyl chloride generation
Companies On This Project
ADVENTUS GROUP
Engineering
