U.S. EPA Contaminated Site Cleanup Information (CLU-IN)


U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division

Fractured Bedrock Project Profiles

Last Updated: December 22, 2003

Point of Contact:
Catherine Yewdall
Blasland, Bouck and Lee, Inc.
8 S. River Rd.
Cranbury NJ 08512 
Tel: 609-860-0590 
Fax: 609-860-0491
Email: cjy@bbl-inc.com

Chemical Manufacturing Facility
Salisbury, NC


Hydrogeology:

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

Contaminants:

Major Contaminants and Maximum Concentrations:
  • - 1,2-Dichloroethane (660,000 µg/L)
  • - 1,2-Dichloropropane (110,000 µg/L)

Site Characterization Technologies:

No technologies selected.


Remedial Technologies:

  • - 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.
Remediation Goals:

None provided


Status:

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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