CONCRETE RH MOISTURE TESTING – SCAN BEFORE YOU DRILL When conducting internal relative humidity (RH) testing using in situ probes (ASTM F2170), or otherwise drilling into slabs, or coring, it is critical to conduct an internal scan of the concrete slab. Concrete slabs, suspended or on-ground, can have a variety of embedding, including post tensioning (PT) cables, electrical conduit, and numerous other items. Many floor consulting and testing agencies do not conduct internal concrete scanning because they do not have the necessary equipment to perform the task. Do not allow underequipped testing firms to drill into your clients concrete slab and risk damage to PT cables, MEP, and other concrete embeddings. Bell Flooring Sciences utilizes high-tech ground penetrating radar (GPR) for this purpose to properly locate and avoid slab embedding.