NAPL Contaminant Location with High-Frequency Croswell Seismic
methods
Jil T. Geller, Ernest L. Majer, Jonathan Ajo-Franklin, Kenneth
H. Williams, and John E. Peterson
Contact: Jil T. Geller, 510/486-7313, JTGeller@lbl.gov
Research Objectives
Our objectives are to develop, demonstrate, and evaluate,
at appropriate field sites, the utility of high-frequency seismic
imaging methods to detect and characterize nonaqueous-phase liquid
(NAPL) contamination in groundwater aquifers.
To continue reading more about this project, view
the 1-page pdf here.
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 Velocity distributions between survey wells at the Paducah Gaseous Diffusion Plant before the onset of remediation. The tomogram on the left is at the site of the TCE spill. The right had image is from wells outside the Plant boundary where there is no dense non-aqueous-phase liquid (DNAPL) TCE. The same lithological contrasts occur at teach site, and the offsets between the layes are consistent. Changes in these distributions in postremediation surveys will indicate whether the lower velocities at the TCE spill site are caused by DNAPL.
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