Point of Contact:
John Horst
ARCADIS G&M
24 Variton Dr.
Wilmington DE 19810
Tel: 302-475-4660
Email:
jhorst@
arcadis-us.com
DNAPL Site
Northern Area, NJ
Hydrogeology:
Low-permeability siltstones and shales with ground water flowing along horizontal bedding fractures.
Targeted Environmental Media:
Dense Non-aqueous Phase Liquids (DNAPLs)
Fractured Bedrock
Contaminants:
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)
Comments:
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:
Dense Non-aqueous Phase Liquids (DNAPLs) 
