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Cross Hole Ultrasonic Monitor (CHUM)

uses the Crosshole Sonic Logging (CSL) method (ATSM D6760-08) to perform high-resolution quality control on deep foundations. The system uses an ultrasonic from an emitter to a receiver while both are pulled through water-filled access tubeswave sent embedded in the concrete. The measured arrival time and energy are directly related to concrete quality. Additional methods supported by the CHUM are Single Hole Ultrasonic Testing (SHUT) and Tomography (two- and three-dimensional).