Groundwater is located in thick sand and salt stringers as well as fractures in lodgement till.
Targeted Environmental Media:
 Dense Non-aqueous Phase Liquids (DNAPLs) - Fractured Bedrock
Contamination was transported to depths less than 5 meters. Concentrations of tetrachloroethene (PCE) above 1 mg/L in shallow groundwater extended over an area of 150 square meters.
Major Contaminants and Maximum Concentrations:
- Tetrachloroethene (24,000 µg/L)
No technologies selected.
- Bioremediation (In Situ)
- Reductive Dechlorination (In Situ Bioremediation)
Comments:
This project used concurrent application of abiotic, micro-scale zero-valent iron (ZVI) and biotic, electron-donor enhanced reductive dehalogenation remediation technologies. After the presence of bacteria that would degrade PCE in groundwater was substantiated, a patent-pending remediation compound-injection technology (HRC) was applied to the site. This technology was implemented in May 2002 and in September 2003.
Not provided in information reviewed.
Favorable conditions were engendered throughout the area of application with reduction of PCE through trichloroethene (TCE) to cis-1,1-dichloroethene (cis-1,1-DCE) seen in several wells after 3 months. Significant reduction of cis-1,2-DCE to vinyl chloride was seen after 9 months. Recent monitoring indicates that vinyl chloride is degrading in several areas.
Reference:
Vaské, Raymond J.; Dennis P. Connair; Randy Jackson; Mike Scalzi; G.M. Zemansky. 2005. Enhanced bioremediation of tetrachloroethene in central Indiana glacial till. The Eighth International In Situ and On-Site Bioremediation Symposium, Baltimore, Maryland. June 6-9.
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