USGS Groundwater Information: Hydrogeophysics Branch
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Geophysical Monitoring of a Biostimulation Pilot Study to Remediate Contaminated Ground Water, Fridley, Minnesota - FY2004
As part of its applied research initiatives in FY2004, the USGS Office of Ground Water, Branch of Geophysics (OGW BG) continued analysis and interpretation of cross-hole radar and geophysical logging data collected to monitor a U.S. Navy pilot biostimulation project designed to remediate groundwater contaminated with chlorinated hydrocarbons in Anoka County Riverfront Park, Fridley, Minnesota.
Down-gradient from the Naval Industrial Reserve Ordnance Plant (NIROP), Fridley, Minnesota, areas contaminated by chlorinated hydrocarbons have been injected with vegetable oil to stimulate biodegradation of chlorinated hydrocarbons. As part of the remediation monitoring efforts, OGW BG conducted geophysical surveys before, during, and after injection of the vegetable oil. The goals of the geophysical monitoring are to characterize the spatial and temporal distribution of the injected fluid and to estimate the emulsion saturation between the wells used for surveying.
During FY2004, the field data were processed and interpreted.
Results of the field experiments helped to provide spatial and temporal
information about the distribution of vegetable-oil emulsion in the
subsurface and demonstrated that changes in electrical conductivity
due to microbial activity or other aqueous geochemistry change resulting
from biostimulation can be monitored using borehole radar methods.
View the online image gallery from this project.
This research was conducted by Fred Day-Lewis and John W. Lane, Jr. (USGS OGW BG) with assistance from OGW BG staff.
Lane, J.W., Jr., 2003, Time-lapse geophysics for aquifer characterization and remediation monitoring [abs.]: EOS Transactions, American Geophysical Union, v. 84, no. 46, Fall Meeting Supplement, abstract H21F-01.
Lane, J.W., Jr., Casey, C.C., Day-Lewis, F.D., Witten, A., and Versteeg, R.J., 2004, Use of borehole radar methods and borehole geophysical logs to monitor a field-scale vegetable oil biostimulation pilot project at Fridley, Minnesota, in Proceedings of the Fourth International Conference on Remediation of Chlorinated and Recalcitrant Compounds, May 24-27, 2004, Monterey California, Proceedings: Battelle Memorial Institute, CD-ROM, 9 pages.
Lane, J.W., Jr., Day-Lewis, F.D., Versteeg, R.J., and Casey, C.C., 2004, Object-based inversion of crosswell radar tomography data to monitor vegetable oil injection experiments: Journal of Environmental & Engineering Geophysics, v. 9, no. 2, p. 63-77.
Lane, J.W., Jr., Day-Lewis, F.D., Versteeg, R.J., Casey, C.C., and Joesten, P.K., 2004, Application of cross-borehole radar to monitor field-scale vegetable oil injection experiments for biostimulation, in Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP), 22 to 26 February, 2004, Colorado Springs, Proceedings: Denver, Colorado, Environmental and Engineering Geophysical Society, CD-ROM, 20 p.
Lane, J.W., Jr., Day-Lewis, F.D., Versteeg, R.J., and Casey, C.C., 2003, Object-based inversion of crosswell radar tomography data to monitor vegetable-oil injection experiment, in Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP), April 6-10, 2003, San Antonio, Texas, Proceedings: Denver, Colorado, Environmental and Engineering Geophysics Society, CD-ROM, 27 p.
Witten, A., and Lane, J., 2003, Offset
vertical radar profiling: Leading Edge, v. 22, no. 11, p. 1070-1076.
For related information, see: