The site includes fractured bedrock groundwater.
Targeted Environmental Media:
 Dense Non-aqueous Phase Liquids (DNAPLs) - Fractured Bedrock
Not documented.
Major Contaminants and Maximum Concentrations:
- Trichloroethene (25,000 µg/L)
No technologies selected.
- Chemical Oxidation (In Situ)
Comments:
A second round pilot study was implemented using an injection and recirculation (I&R) approach to enhance oxidant delivery and contact to remediate dissolved trichloroethylene (TCE) in fractured bedrock groundwater. The two-week pilot study included continuous recirculation of site groundwater. The amendment used was up to 3% sodium permanganate. The objective of the pilot study is to assess the impact of oxidant recirculation in limiting the extent of rebound that was observed at the site after a first round of pilot study that did not include recirculation.
Not documented.
The second round pilot study was ongoing at the time the reference cited was prepared. The I&R design (including drawdown, injection and extraction flow rates, breakthrough of the oxidation at the extraction well, etc.) was developed based on aquifer properties and analytic aquifer solutions (including A Screening Model for Injection-Extraction Treatment Well Recirculation System Design (Wu, 2008)), an analytical model for estimating the steady-state capture zones of pumping wells, the Steady State Thiem Equation, and unconfined aquifers). The design parameters will be evaluated against the actual field observations as part of the pilot study.
Not documented (project ongoing).
Reference:
Heaston, M. 2012. ýInjection & Re-circulation of Sodium Permanganate to Treat Chlorinated Solvent Impacted Groundwater in Fractured Bedrock.ý 8th International Conference Remediation of Chlorinated and Recalcitrant Compounds. May 21-24.
Wu, M. Y., Smits, K. M., Goltz, M. N. and Christ, J. A. 2008. A Screening Model for Injection-Extraction Treatment Well Recirculation System Design. Ground Water Monitoring & Remediation, 28: 63ý71. doi: 10.1111j.1745-6592.2008.00212.x
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