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AN UPDATED MODEL FOR THE ANOMALOUS RESISITIVITY OF LNAPL PLUMES IN SANDY ENVIRONMENTS
SAUCK, W., E. ATEKWANA, AND D. D. WERKEMA. AN UPDATED MODEL FOR THE ANOMALOUS RESISITIVITY OF LNAPL PLUMES IN SANDY ENVIRONMENTS. Presented at Spring American Geophysical Union Joint Assembly, Baltimore, MD, May 23 - 26, 2006.
Research is being conducted to improve and evaluate the resolution of the CR, EM, seismic, and GPR methods over complex geological formations (such as fractured geologies) and to evaluate the capability of these geophysical methods to delineate subsurface organic contaminants.
Anomalously low resistivities have been observed at some sites contaminated by light nonaqueous phase liquid (LNAPL) since 1997. The conductive model that has been used to explain this phenomenon was published in 2000. The working hypothesis in the conductive model invokes both physical mixing and bacterial action to explain the low resistivities near the base of the vadose zone and the upper part of the aquifer.
Record Details:Record Type: DOCUMENT (PRESENTATION/ABSTRACT)
Organization:U.S. ENVIRONMENTAL PROTECTION AGENCY
OFFICE OF RESEARCH AND DEVELOPMENT
NATIONAL EXPOSURE RESEARCH LABORATORY
ENVIRONMENTAL SCIENCES DIVISION
CHARACTERIZATION & MONITORING BRANCH