The aquifer consists of regolith overlying fractured bedrock. The regolith consists of clay-rich unconsolidated saprolite and a transition zone consisting of thouroughly weathered rock, partially weathered rock, and competent rock fragments. Ground wate flow in the bedrock is mainly through vertical of high angle fractures.
Targeted Environmental Media:
 Fractured Bedrock
Major Contaminants and Maximum Concentrations:
- 1,2-Dichloroethane (660,000 µg/L)
- 1,2-Dichloropropane (110,000 µg/L)
No technologies selected.
- Pump and Treat
- Other
Comments:
The site has an existing pump and treat system but the system may be replaced by natural attenuation, biostimulation or bioaugmentation.
None provided
Evaluation of geochemical data collected from site monitoring wells provides evidence that the chlorinated compounds are naaturally degrading via various metabolic pathways. The presence of vinyl chloride, elevated ethene concentrations, and chloroethane indicate reductive dehalogenation and dehydrohalogenation are likely pathways of degradation. The presence of elevated concentrations of chloride and carbon dioxide compared to background indicates that complete mineralization of chlorinated compounds is occurring.
As of Dec. 2003, ground water at the source area is still being pumped and the plume area is being characterized.
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