Ground Penetrating Radar (GPR) is a geophysical method that uses radar pulses to image the subsurface. Canyon State Inspection Inc. utilizes GPR in locating subsurface objects such as reinforcing steel, post tension cabling, and voids in concrete up to 12" thick. This system is non-radiating which allows its use in airport terminals, hospitals, hotels, schools, and prisons where removal of personnel is not feasible.