GPR / Concrete scanning for Copper lines, Rebar, Post Tension Cables, Slab Thickness, Electrical Conduits, Reinforced Steel etc. Orange County Concrete Coring & Cutting uses the most advanced technology called Ground Penetrating radar. This reduces time and cost and produces the results on-site and in real time. Unlike concrete X-ray which requires job site evacuation and gives off radiation. With GPR there is no radiation, no evacuation. GPR is completely safe and approved by the FCC. GPR was developed by the military to safely locate mines and is now used by Orange County Concrete Coring & Cutting to locate post tension cables, rebar, conduits, voids and slab thickness in concrete.