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Miller Drilling
GEL Geophysics conducted a geophysical borehole logging investigation of fractured bedrock at a manufacturing facility using acoustic televiewer. The logs were analyzed for fractures and other features. The results of the investigation included a list of detected fractures with attributes such as depth, dip, dip angle, and aperture.
Unimin
GEL Geophysics, LLC performed three GPR investigations adjacent to the location of a sand mine. The sand overlies an irregular clay formation. Below the clay formation, there is a mix of sand, gravel, silt and clay. The project sites consisted of approximately 45 miles of transects. The purposes of the investigations were: 1) to assess the thickness of the sand formation along the selected transects, and 2) to evaluate the existence of clay lenses within the sand formation. The area surveyed consisted primarily of paved and unpaved roads. At the base of the sand formation, there was a strong GPR reflection from the sand-clay interface. Features in the GPR records above the sand-clay interface, such as on-lap sequences, suggest clean, well-sorted sand. Velocity calibrations were conducted by surveying at a location where the thickness of the sand was known, and by conducting wide-angle reflection and refraction (WARR) surveys.
Confidential Client
GEL Geophysics conducted an electrical resistivity imaging (ERI) investigation at an EPA Superfund site in Kansas. This investigation was performed to aid in characterizing the subsurface along select profiles at the site. The objectives of the geophysical investigation were to identify and locate potential preferential pathways in the alluvial aquifer from the ground surface to the top of bedrock through which contamination from the site could potentially be conveyed to downgradient locations, and to produce cross-sectional images of the subsurface that identifies the location and depth of potential paleochannels. The ERI survey confirmed the presence of two sand layers throughout the project site. The sand layers may be hydrogeologically connected at locations where an interbedded clay layer is missing. It is possible that several paleochannels exist in the lower sand formation that may contain coarser material.
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