The Chemtronics Site lies within the Blue Ridge geologic province. The Blue Ridge province is predominantly composed of ancient igneous and metamorphic rocks. These rocks have been complexly folded and faulted in a northeasterly direction, parallel to the regional trend of the mountains. These structural and metamorphic imprints are reflected in the topographic and drainage patterns
within the region.

Groundwater recharge in this area is derived primarily from local
precipitation. Generally, the depth of the water table depends on the
topography and rock weathering. The water table varies from the ground surface in the valleys (streams) to more than 40 feet below the ground surface in sharply rising slopes.
The aquifer underlying the Site can be subdivided into a surficial zone and a
bedrock zone. The surficial zone refers to the overlying saprolite and the
bedrock zone includes the weathered and fractured region of the bedrock. These
two zones are considered one aquifer as it was demonstrated in the RI that
these zones are interconnected.

• Fractured Bedrock

The exact extent of the plume is undefined.

• 1,2-Dichloroethane (95,000 µg/L)
• Benzene (4,700 µg/L)
• 1,2-Dichloroethene (120 µg/L)
• Bromoform (1,100 µg/L)
• Chloroform (1,900 µg/L)
• Methylene chloride (9,200 µg/L)
• Trichloroethene (1,200 µg/L)
• Chromium (104 µg/L)

• Pump and Treat

1,2-Dichloroethane 5 ug/L
Benzene 5
Bromoform 100
Chloroform 100
Methylene Chloride 60
Trichloroethene 5
Chromium 50

The pump and treat system continues to operate. Concentrations in monitoring wells have fallen but are still well above cleanup levels.

http://cfpub.epa.gov/supercpad/cursites/csitinfo.cfm?id=0402957