The subsurface geology at the site consists of a fractured bedrock aquifer, with contamination detected in the bedrock fractures present up to 220 ft below grond surface. The majority of contamination was detected in the shallow depths at 40-45 ft. bgs. The ground water velocity is fairly slow.
Targeted Environmental Media:
 Dense Non-aqueous Phase Liquids (DNAPLs) - Fractured Bedrock
Major Contaminants and Maximum Concentrations:
- Ethanol (355,000 µg/L)
- Trichlorofluoromethane (52,000 µg/L)
- Trichlorfon (31,000 µg/L)
- 1,1,1-Trichloroethane (11,000 µg/L)
- Methylene chloride (10,000 µg/L)
No technologies selected.
- Chemical Oxidation (In Situ)
Comments:
An initial field pilot program consisted of ten days of injecting reagents. Injection was at multiple depths with a majority in the shallow 40 - 45 ft bgs interval.
The results indicated that overall site-wide contamination of total average VOCs was reduced by 93% and average ethanol concentration was reduced by 99%.
None provided
As of April, 2004 the decision on full scale is still pending.
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