At A1 Concrete Scanning we locate POST TENSION CABLES, REBAR, CONDUITS, ELECTRIC, slab thickness and voids in your slab using the most advanced technology called Ground Penetrating Radar (GPR). GPR reduces time, cost and gives you results onsite in real time. Unlike x-raying concrete, which gives off radiation and requires evacuation, GPR has NO health hazards and doesn't require evacuation. GPR was developed by the military to safely locate mines and is now used to locate post tension cables, rebar, conduits, voids and slab thickness in concrete. We Locate: ◾Post Tension Cables ◾Rebar ◾Voids ◾Slab Thickness ◾Conduits …embedded in slabs, walls, balconies, and columns Call A1 Concrete Scanning before you Cut, Core, or Drill! You will receive only the best customer service, most precise readings and the best rates.