Concrete Scanning in Lancaster County in Central Pennsylvania

Concrete Scanning in Lancaster County in Central Pennsylvania


In January, Sam Hart of Ground Penetrating Radar System (GPRS) was contacted by a renewable power company to assist in their on-going renovation in Lancaster County. This has been the fourth phase in the last four years that the two companies have worked together. This phase included scanning (4) 5’x5’ areas. The renovation would include running new electrical conduit through the elevated slab to two new electrical cabinets. Sam Hart, project manager for GPRS in central Pennsylvania, worked closely to keep the project running on time for the client. The scanning areas first had to go through abatement, demolition and then the scanning took place. After the top and bottom rebar is marked out along with multiple conduits, the core drillers would then have a better idea of where they could safely drill.

The Problem:

In the (4) 5’x5’ areas the concrete was approximately 15 inches thick of cast-in-place rebar. The slab was made up of at least two layers of rebar. The rebar is slightly concerning due to the number of holes being drilled, but the main concern is the large number of electrical conduits running through the slab. The slab has hundreds of conduits feeding multiple electrical panels and other important machinery. The slab also had grounding wire that needed to be avoided.


Sam was able to mark out this critical rebar and conduits in these areas. The core drilling wasn’t scheduled to start for a couple weeks but all had gone smoothly according to the client. This is now the 4th phase that GPRS has helped the client to avoid any major issues. The holes are checked after the core drilling has taken place to ensure no additional rebar or conduit have been disturbed. To date, all core drilling locations were drilled without an issue, in a timely and flawless manner. GPRS was able to provide multiple project managers on-site when needed, so the project stayed on schedule.

The Solution & Benefits:

The solution was for Sam to arrive on site find and pinpoint the reinforcement along the perimeter of the building using the StructreScan Mini XT GPR unit. Sam did just that, in an appropriate and non-invasive manner. All markings were made in real time recorded daily. It is never safe to assume that embedded objects such as conduits, rebar, and post tension cables do not exist when core drilling, saw-cutting, or chopping concrete. Contact Ground Penetrating Radar Systems prior to using any of these methods on your next concrete project. Your team will save time, avoid damage, and steer clear of costly repairs. Our Project Managers are equipped with the latest and greatest technology in the industry. Pair that with our state-of-the-art training program, each of GPRS’s project managers bring the skills and training to successfully complete each project. (Visit for more information).

For concrete scanning and private utility locating in Central Pennsylvania, contact Project Manager Sam Hart at 717-798-5721 or

For concrete scanning and private utility locating in South Jersey, Delaware and Philadelphia, contact Grant McGuigan 484.280.2234 or, William Wells 609.350.9651 or, or Steve Logue 267.547.0817 or

GPRS does not provide geophysical, geological, land surveying or engineering services. If you need such services, please contact an appropriate professional.