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 15, 2004

Point of Contact:
John Horst
24 Variton Dr.
Wilmington DE 19810 
Tel: 302-475-4660 
Email: jhorst@

Northern Area, NJ


Low-permeability siltstones and shales with ground water flowing along horizontal bedding fractures.

Targeted Environmental Media:
  • - Dense Non-aqueous Phase Liquids (DNAPLs)
  • - Fractured Bedrock


Major Contaminants and Maximum Concentrations:
  • - Tetrachloroethene (DNAPL)

Site Characterization Technologies:

No technologies selected.

Remedial Technologies:

  • - Flushing (In Situ)
    • Surfactant
  • - Bioremediation (In Situ)
    • Reductive Dechlorination (In Situ Bioremediation)
The full-scale application of engineered anaerobic technology alone had been very successful, resulting in a reversal of molar PCE/ethene ratios, the reduction of PCE concentrations by over 90% and the treatment of additional mass made available through surfactant-driven desorption. Because the presence of DNAPL can represent a significant continuing source, zero valence iron was selected as a means to optimize the degradation process and shorten the overall lifespan of the remediation effort. Following addition of the iron, biogeochemical monitoring indicates that the rate of mass destruction has been enhanced in the source area, resulting in an order of magnitude increase of free chloride concentrations equivalent to the degradation of an additional 2,500 mg of PCE per liter of water flowing through the treatment area
Remediation Goals:

None provided

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