Fractured mudstones of the Newark Basin.

The site consists of dipping mudstone units. Within these units, bedding-plane parting fractures are the most permeable features.

Hydraulic testing indicated that fractures perpendicular to the bedding has vertical hydraulic communication. Within the site, vertical permeability varied and was most prominent near a steeply dipping fault.

• Fractured Bedrock

Contaminants found up to 60 meters below land surface.

• Trichloroethene (0 µg/L)
• cis-1,2-Dichloroethene (0 µg/L)
• Vinyl chloride (0 µg/L)

• Fluid Loggings
• Flow
• Surface Seismic Surveys
• Vertical Chemical Profiling
  • Packer Isolation
• Tracer (dye) Test
• Other (Hydraulic tests)

Comments:
Transmissivity of bedding-plane fractions and the fractures within the massive mudstone units were estimated through hydraulic tests which used packers to isolate discrete intervals of boreholes.

• Pump and Treat
• Bioremediation (In Situ)
  • Reductive Dechlorination (In Situ Bioremediation)

The mass removal of aqueous-phase chlorinated solvents was evaluated via pump and treat, monitored natural attenuation, and enhanced biodegradation (bioaugmentation).

Concentrations in bedrock boreholes have remained relatively constant:

TCE = 200,000 micrograms/liter (¼g/L)
DCE = 16,000 ¼g/L
VC = 1,200 ¼g/L

Results from the hydraulic tests will be used to develop a groundwater flow model of the site and to approximate the variability of groundwater fluxes. This data, in conjunction with contaminant concentrations and tracer tests, will be used to estimate contaminant mass removal by various technologies.
Benefits of the investigation include development of cost-effective field methods for collecting data; insight into the physical and biogeochemical controls; guidelines for implementing the technologies in fractured-rock settings; and insight into mass removal calculations.

References:
Goode, Dr. Daniel J., Dr. Allen M. Shapiro, and Clare R. Tiedman
SERDP: Meeting DoDs Environmental Challenges, 2007 (Poster Number 187 - Wed., F-174)
Characterizing Spatial Heterogeneity in Fractured Rock to Evaluate Mass Removal of TCE, DCE, and Vinyl Chloride at the Naval Air Warfare Center, West Trenton, NJ

SERDP Research Technology Projects
Dr. Allen M. Shapiro, October 16, 2007
A Comparison of Pump-and-Treat, Natural Attenuation, and Enhanced Biodegradation to Remediate Chlorinated Ethene-Contaminated Fractured Rock Aquifers
Available Online at: http:www.serdp.orgResearchuploadER_FS_1555.pdf