Tri-state Concrete Scanning utilizes ground penetrating radar (GPR) to see through asphalt and concrete structures and detect subsurface objects such as rebar, pipes, post tension cables, electrical conduits and voids. TCS provides utility locating and mapping in Maryland, Virginia and DC. Both contract and hourly pricing is available. Locate Rebar, Post-tension and conduits | Core-drilling | Locate voids for structural integrity of concrete | Measure concrete thickness | Utility location