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Geophysical Monitoring of Two types of Subsurface Injection
Citation:
Miller, C. Geophysical Monitoring of Two types of Subsurface Injection. Presented at Oklahoma State University (OSU) Geology Department.
Impact/Purpose:
Presentation for the Oklahoma State University (OSU) Geology Department, Stillwater, OK., February 24, 2012.
Description:
Nano-scale particles of zero-valent iron (ZVI) were injected into the subsurface at the 100-D area of the DOE Hanford facility. The intent of this iron injection was to repair a gap in the existing in-situ redox manipulation barrier located at the site. A number of geophysical measurements were acquired prior to and following the injection in order to characterize the extents of the injected iron. The geophysical results were useful in confirming the successful emplacement of the ZVI particles and in siting a confirmation borehole later emplaced at the site. Foam has been investigated as a potential carrier of amendments for remediation of contaminants in the vadose zone. Bench scale studies were performed to assess the foam movement through sediments and to test various geophysical methods for monitoring of subsurface foam injection. Preliminary results indicate that ground penetrating radar and electrical resistivity are viable techniques for imaging the foam injection.