North Carolina News

Asheville, NC – Site: Downtown Asheville

On November 25th, 2014 Ground Penetrating Radar Systems (GPRS) was requested on site to complete a Ground Penetrating Radar (GPR) survey. The purpose of this survey was to locate any utilities that may be present prior to completing soil borings and drilling.

We used a GSSI (Geophysical Survey Systems, Inc) Ground Penetrating Radar Unit with one specific antenna. The antenna used on this project was a 400MHz antenna which was used to help identify any utilities or anomalies that may have been present in designated areas prior to drilling.


Monroe, NC

On November 26th, 2014, Ground Penetrating Radar Systems (GPRS) was requested on site in Monroe, NC to perform a Ground Penetrating Radar (GPR) survey. The purpose of the scanning was to locate any existing utilities that may be present in locations where trenching was to take place for new transformers that were going to be installed.

We used a GSSI (Geophysical Survey Systems, Inc) Ground Penetrating Radar Unit with one specific antenna. The antenna used on this project was a 400MHz antenna which was used to help identify any utilities or anomalies that may have been present in designated areas prior to trenching.


Curtis Hoag
Project Manager | Charlotte, NC
P 704.582.3219
F 419.843.5829

Ground Penetrating Radar Systems, Inc.

GPR Used to locate Utilities in St. Petersburg, FL

In November of 2014, Ground Penetrating Radar Systems, Inc. (GPRS) was contacted in order to locate utilities such as sewer lines, electric, water lines, communication and any other anomalies at a VA Hospital in St. Petersburg, FL. The contractor needed to make certain of where these anomalies were in order to avoid hitting them when installing new light poles and electrical conduit. The company contacted GPRS of Tampa, Florida in order to know where these lines were located in order to avoid hitting them when directional boring as well as to run new conduit to existing electrical.

Isaiah Runkle and Justin Rasanow of GPRS were contacted in order to perform the survey at this location. Using our 400MHz antenna radar equipment, we were able to map out the utilities and other anomalies which were running through the areas of concern as well as provide depths to the tops of the anomalies found. The contractor was pleased with our results and felt relieved that they were able to bore in the areas knowing where the utilities and other anomalies were located.

Below is a photo taken on-site which depicts Isaiah locating utilities running through one of the areas of concern.


Identifying PT Cables in Roof Deck in Austin, TX

Prior to drilling holes through a roof deck to install new storm drains, plumbers on site decided to contact GPRS to locate post tension cables first. Central Texas Regional Manager Corey Brecht was able to use non-destructive GPR testing to identify critical reinforcing steel and other obstructions within the concrete so that the plumbers could core through the deck safely.

To find out how GPRS can safely help you find rebar, post-tension cables, and conduit in your slab, please call Corey Brecht at 512-417-6105 or email at


Reinforcement Locate in Utah

Ground Penetrating Radar Systems was contacted by a facility to locate the rebar and its spacing measurements of a concrete foundation to better understand the structural integrity. The customer was going to put a significantly larger machine on top of the slab than the one that was currently sitting on it. They were concerned the concrete would not be strong enough to support 200,000 pounds of weight. GPRS successfully came out and located all the rebar and its spacing in multiple areas giving the customer a better sense of the support the structure had.

Reinforcement Locate in Utah1Reinforcement Locate in Utah2

Ground Penetrating Radar Systems used a GSSI 1600 MHz antenna for this application to locate the reinforcement and conduits. All findings were marked directly on the concrete at customers request for easy interpretation. GPR was ideal for this application due to the active work site in the surrounding areas. GPR emits no radiation and is safe for others to work in the area near the scan location.

For a similar x-ray on your job site in Utah, Idaho, or Montana please contact Adam Kubicki at 801-599-2115 or at Sonar has also been used in Tooele, Salt Lake City, Ogden, Provo, Heber City, West Jordan, West Valley, and Park City. GPRS can also locate utilities in the Utah, Idaho, and Montana areas.

Concrete Imaging Technology Utilized to Locate Reinforcing Steel within a Precast Plank Providence, RI


An engineer needed to replace the traffic control spikes in a parking garage and the old bolt pattern did not match the new. Because of this issue, the engineer needed drill into the precast plank but could not damage any of the reinforcing. In order to miss all of the reinforcing, the engineer had to have all of the reinforcing within the plank accurately mapped out. In order to get the accurate results that he required, the contractor contacted Ground Penetrating Radar Systems of Rhode Island to scan the plank to verify location and depth of the reinforcing. GPRS used a High Resolution 1600MHz Antenna for the project that is able to scan concrete up to 15” in thickness with an incredible accuracy of +/-1/4” on the location and depth of the anomaly. GPRS marked the reinforcing steel pattern directly on the surface and helped line up the new traffic control spikes to ensure that the structural integrity of the plank remained in tact.


To learn more about the capabilities of GPRS in Massachusetts, Rhode Island, New Hampshire, Maine & Vermont, contact Regional Manager, Mark Johnson, at 617.448.8098 or

Underground Utility Locating Performed Around a Helipad Outside the University Hospital in Ann Arbor, MI

Ann Arbor

Prior to excavating or drilling outside, it’s helpful to have information on the sub-surface utilities that might be within the construction area. During any sub-surface exploration it’s imperative not to compromise any of the underground utilities. Having the private utilities marked will help the process continue on more smoothly.

A general contractor was asked to install a security fence around the helipad outside at the university hospital in Ann Arbor, MI. Prior to digging the post holes for the fence the contractor needed to have the areas investigated for possible underground utilities that could be in the proposed fence line. It was essential there weren’t any utilities compromised throughout the process especially near the helicopter pad. Ground Penetrating Radar Systems of Ann Arbor, MI was contacted to investigate the areas surrounding the helipad to make sure any utilities were identified prior to digging the holes for the security fence. GPRS utilized a radio detection device in the surrounding areas of the helipad where there was uneven and sloped ground to identify any utilities. Any utilities located were marked/flagged directly on the surface and then communicated to the general contractor. GPRS also provided a sketch of where the utilities were passing through in the event the flags were removed prior to the digging process. Knowing where the utilities were allowed the contractor to continue with confidence on the path of the security fence.

Ann Arbor

Prior to your next sub-surface project in the Ann Arbor & Detroit, MI areas, contact Regional Manager, Thaddeus Bullock, at 734.377.4551 or You can also visit our website at for more information on the capabilities of GPRS.

Concrete Scan at a Hospital in Lancaster California

Ground Penetrating Radar Systems, Inc. – GPRS – of California was contacted by a construction company to locate rebar and conduit in a slab prior to anchoring equipment in a hospital in Lancaster, CA. We scanned 4 different rooms where they were to anchor medical refrigerators and treadmill walkers. We used tape to mark out rebar per the costumer’s request as we were working on a finished floor. We also used tape to mark out conduit and we wrote “possible conduit” on tape using red crayon to distinguish between rebar and conduit. Using our 1600 MHz antenna we were able to see well into the slab and found several conduits running at angles underneath the rebar at depths of 3”-5”.

Ground penetrating radar is a great tool to scan areas of post tension cables, rebar, and conduits, including PVC pipes and can also be used to locate underground utilities prior to digging or excavating. Please contact Ground Penetrating Radar Systems – GPRS to learn how we can assist with your project. To locate rebar, post tension cables, voids, conduits, pipes or utilities in concrete or underground please contact us today. GPRS has offices throughout the entire state of California and performs GPR surveys throughout the entire state, including cities like Ventura, Santa Barbara, Thousand Oaks, Westlake, Malibu, San Fernando Valley, Los Angeles, Irvine, Glendale, San Diego, Riverside, Pasadena, Torrance, Orange, Anaheim, Long Beach, Lancaster, Palmdale, Bakersfield and San Luis Obispo. Please contact Freddy Espinal at 805-729-5877 or to learn more about ground penetrating radar and how GPRS can assist in your projects.

Concrete Scan at a Hospital in Lancaster California1 Concrete Scan at a Hospital in Lancaster California2

Photos of area we scanned and marked out rebar and conduit. To schedule service or obtain a quote, please contact Freddy Espinal 805-729-5877 or

Underground Storage Tank Locating – Minot, North Dakota

John Incorvaia | Project Manager

The property location was in the parking lot of a building, currently being transitioned into a multi-business office building. A gas station once sat on the southeast corner of the property many years ago. The area to be scanned is where the old filling station was once located.

An environmental consultant contacted GPRS to use Ground Penetrating Radar (GPR) to verify whether or not the USTs (Underground Storage Tanks) are in place and if so, to mark out the approximate location(s) under the surface. Technician John Incorvaia was able to use GPR to essentially “X-Ray” the asphalt, through the soil, to provide reliable, real time data of the UST’s remaining. To confirm that this was the only area in which UST’s were located; our technician scanned the surrounding areas of the parking lot. For service from GPRS in North Dakota please contact us in Bismarck at (701)202-8182 or Fargo at (701)371-4461.

Minot, North Dakota