GPR Combined with Radio Detection Proves to be Successful Before Drilling for Soil Samples

Ground Penetrating Radar Systems (GPRS) was requested to perform a Ground Penetrating Radar (GPR) service on site. The purpose of this project was to locate any existing utilities that may be present in the designated area. As a supplement to GPR, we also used radio detection (RD) to help identify live power, communication and other utilities that may have a power signal on them. Once the utilities in the path were identified they were marked directly on the surface so the customer could clearly see where the utilities were located. After all the utilities were located on this project, the customer brought in a drilling rig to take soil samples of the ground. Because GPRS was available onsite to help identify any anomalies that may be present, the customer was able to drill on the site without striking any existing utilities that may be present.

We used a GSSI (Geophysical Survey Systems, Inc.) 400 MHz antenna in combination with the RD equipment. This antenna in NC/SC ranges in depths of up to 6’. When scanning with a GPR utility antenna, we take many variables into consideration to make sure that we are collecting the best data possible when running our scans. For this specific application the customer was planning on drilling vertically into the ground around 25’-50’ depending on resistance.

The best equipment in the industry, in the hands of a highly trained GPRS technician gave the client confidence to drill or excavate without incident. GPRS also specializes in concrete scanning for post tension cables, scanning for conduits in a concrete slab prior to core drilling or just helping identify the structural properties that may be present in an existing concrete wall or slab.

For more information, to request a quote or to schedule GPRS for your next project, contact Curtis Hoag

Regional Manager for Charlotte, NC at 704-582-3219 or  For a complete listing of our nationwide locations, visit

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