borehole seismic velocity (downhole, crosshole, tomography)

Advanced Geoscience, Inc. is an international geoscience field services and consulting firm based in Los Angeles, California and Reno, Nevada USA, established in 1997. The firm is staffed by geophysicists, geologists, and hydrogeologists who perform subsurface geophysical and geological investigations, groundwater, mineral, and oil and gas exploration, near-surface geophysical surveys for geotechnical studies and underground construction, and non-destructive evaluation of earth structures such as dams, levees, tunnels, harbor bulkheads, and concrete pile

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concrete-scanning radardigital signal processingElectrical Resistivity Imagingelectromagnetic induction and ground conductivity surveysgravity and micro-gravity surveysground penetrating radar (GPR)Impact-Echoimpulse response techniquesinduced polarization surveysmagnetometer surveysmulti-channel analysis of surface waves (MASW)non-destructive evaluationseismic reflection surveysseismic refractionsonic pulse echosurface waveswaveform analysis