The overburden or unconsolidated deposits in the study area have been mapped as till. This unit consists of a non-sorted and non-stratified mixture of clay, silt, sand, gravel, and boulders and may also contain thin interbedded lenses of stratified sand, silt or gravel.

The schist is the country bedrock in the region and was subsequently intruded by the granite pegmatite. Much of the granite pegmatite intrusions appear to occur as a series of sills. During drilling of deep bedrock wells, granite pegmatite sills were encountered.

There is an extensive discussion of the site hydrogeology in the RI at http://www.epa.gov/region1/superfund/sites/linemaster/448631.pdf

• Fractured Bedrock

Not given but contamination is in deep bedrock.

• Acetone (50,000 µg/L)
• Trichloroethene (800,000 µg/L)
• 1,2-Dichloroethene (26,000 µg/L)
• 2-Butanone (MEK) (38,000 µg/L)
• 2-Hexanone (2,100 µg/L)
• Toluene (64,000 µg/L)
• Tetrachloroethene (1,800 µg/L)
• 1,1,1-Trichloroethane (1,700 µg/L)
• Cadmium (757 µg/L)
• Arsenic (513 µg/L)

• Borehole Geophysics
  • Single Point Resistance
  • Natural Gamma
  • Caliper
  • Acoustic Televiewer
  • Video Camera Televiewer
  • Other (Resistivity, Spontaneous Potential)
• Fluid Loggings
  • Temperature
  • Conductivity/Resistivity
• Vertical Chemical Profiling
  • Packer Isolation
• Surface Conductivity Surveys (EM)
• Coring
• Other (Slug)

• Pump and Treat

Cleanup goals are MCLs.

The pump and treat system continues to operate. While concentrations of some contaminants (e.g. acetone) have fallen off dramatically TCE and DCE remain very high (10s of thousands of ug/L.

http://cfpub.epa.gov/supercpad/cursites/csitinfo.cfm?id=0100041