The site has about 10 feet of overburden that is underlain with a fine to medium grained thin bedded limestone that contains predominantly horizontal fractures.
Targeted Environmental Media:
 Dense Non-aqueous Phase Liquids (DNAPLs) - Fractured Bedrock
The plume in the shallow bedrock is about 1,000 feet wide and 900 feet long. The vertical extent is estimated to be 70 to 80 feet.
Major Contaminants and Maximum Concentrations:
- Trichloroethene (340,000 µg/L)
- 1,2-Dichloroethene (38,000 µg/L)
- Vinyl chloride (170 µg/L)
- Polychlorinated biphenyls (PCBs) (3,600,000 µg/L)
- Pumping Tests
- Tracer (dye) Test
- Pump and Treat
Comments:
The pump and treat system has five on site extraction wells. It began operation in 1993. In 1995 one of the extraction wells was deepened and the treatment system capacity was increased to 120 gpm. TCE and PCB DNAPLs are believed to be present.
All the contaminants of concern have MCLs.
The pump and treat system continues. Concentrations of the contaminants of concern have fallen in monitoring wells but are still high.
http://cfpub.epa.gov/supercpad/cursites/csitinfo.cfm?id=0403783
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