GPRS Investigates Deterioration of Dock Cells of Fuel Storage Terminals

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Ground Penetrating Radar Systems, Inc. is the nation’s largest company that specializes in detection of underground utilities and scanning of concrete structures. GPRS has an extensive nationwide network of highly trained and experienced technicians in every major U.S market and in Canada. We use the industries best equipment, and our technicians have the training necessary to complete any job; even a project that requires them to travel on a boat to a fuel storage terminal on the St. Johns River in Florida.

Adam Yunker, Regional Manager for Northern Florida was contacted by a large petroleum company to inspect the outer ring of 4 docking cells that were built in the early to mid-1900’s. The original design of the docking cells was sufficient to accommodate the size of ships at that time, but as larger ships were anchoring at these cells the integrity of concrete structures needed to be redesigned. Over the years the docking cells had been reinforced with outer layers of sheet piling and concrete, but the client was unsure if rebar had been used in the most outer layer. In most recent years the outer layer of sheet piling and concrete was beginning to decay and had been damaged in a few areas. The client wanted to repair the cells and needed to know some information regarding the current structural integrity and reinforcing steel within the concrete. GPRS was contracted to inspect the cells and provide information regarding the rebar present in the concrete (if any).

GPRS Investigates Deterioration of Dock Cells of Fuel Storage TerminalsIn order to scan the cells, Adam needed to ride out on a boat with a crew of 4 men to get access to the tops of the cells. After using a ladder system to gain access to the top surface of the docking cells GPR was then used to scan the concrete surface of the cell. Adam was able to determine that 2 of the cells did not have any reinforcement and 2 of the cells did contain rebar which he was able to map out and mark on the surface. As a result of the GPR results, engineers were able to determine the proper course of action to complete the repairs to existing cells. GPRS technicians are equipped with several types of equipment to adapt to unique situations like this one. Adam used the GSSI StructureScan mini which does not require long cables or other bulky equipment which makes it easier to transport the equipment on the boat and get it to the scanning location. With the information that GPRS provided the client will be able to make the necessary repairs to the 2 cells and make the determination if additional reinforcement was needed on the other 2. Knowing what was below the surface of the concrete gave the client the confidence and knowledge to make the best decision.

Mapping deterioration of concrete and corrosion of rebar is critical to maintaining the integrity and safety of concrete structures. GPRS utilizes state-of-the-art mapping technology to measure the strength of reflection in rebar and our technicians can identify the structural risks in concrete, allowing clients to begin remediation before the deterioration compromises the structure. In addition, our technical expertise in interpreting and mapping this data helps clients perform maintenance before deterioration becomes more extensive and costly to repair.

GPRS has become the industry’s first choice in GPR services due to our commitment to safety, customer satisfaction and technical expertise. We believe that this honor speaks to our outstanding staff, our loyal customer base and the high level of service that we provide to the industry, which is why we are known as the Experts in GPR. GPRS utilizes the latest technologies in ground penetrating radar, concrete x-ray, and electromagnetic induction. In the hands of the most experienced technicians in the industry, these tools can provide immediate and accurate detection of subsurface elements, allowing construction managers, engineers, contractors, utility workers, and homeowners to safely conduct their jobs in less time and at a lower cost. For a complete listing of our nationwide locations, visit our website at; contact us for more information, to request a quote or schedule your next project.

GPRS Rapid Response Program

Ground Penetrating Radar Systems of MD/DC/VA is proud to introduce the launch of a next-day availability service called RAPID RESPONSE.

This RAPID RESPONSE service was developed out of a need for times when an additional area is added to your scope of work or GPR needs were an afterthought on your project.

  • This RAPID RESPONSE service is a complimentary service in addition to your usual GPR needs; the same daily/nightly rates apply.
  • The RAPID RESPONSE service allows GPRS to assist you on your project within 24 hours of request.
  • The RAPID RESPONSE service is available within 60 miles of the DC, Baltimore, and Richmond areas and may soon be available in other markets such as Annapolis, Virginia Beach, and Roanoke.

What does this mean for you?

Our goal is to provide our clients with a sensational experience to prevent them from experiencing the problems associated with unknown subsurface elements. Your local technician will still be available to schedule future projects, but when an urgent need occurs on your site, GPRS is ready and available. We understand that time is money and we are available to prevent you from falling behind.

How does it work?

The team for your area will be notified and we will reply rapidly to schedule your project. Please include the location of your project and the scope of work desired.

GPRS is Called to Local Sports Facility to Clear an Area Prior to Core Drilling

Ground Penetrating Radar Systems, Inc. of Denver, CO was contacted by a contractor to locate conduit and reinforcement in a concrete slab at local university. The customer needed to core drill through the concrete slab to install new plumbing for renovations in the building. The customer was looking to avoid striking any conduit in the slab which would result in costly repairs or even injury if a live conduit is struck. GPRS, Inc. arrived on site to provide GPR (ground penetrating radar) for the customer, keeping the project on schedule without repairs or any other possible problems.


GPR does not require evacuation of the area because it does not emit radiation and is completely safe to be around. All data findings are marked directly on the surface at the customer’s request for the easiest interpretation of the scanning provided.

GPRS specializes in GPR service and is our primary source of revenue. With that in mind, the amount of experience and specialization of concrete imaging and investigations as well as a nationwide network of technicians; GPRS, Inc. is unrivaled in the industry. For more information about our concrete imaging capabilities or other GPR applications contact us for a demo or lunch and learn; let us buy your team lunch so we can tell you more about our company and what we can offer your company and projects. Ground Penetrating Radar Systems has an office local in Denver, CO serving all of Colorado and Wyoming as well as local offices in Salt Lake City UT, Albuquerque NM, Phoenix AZ, Omaha NE, and Kansas City. Contact Ryan Shannon (Project Manager) at 303.913.8630 or today to schedule an appointment or free demo or if you have any inquiries.

GPRS Finds Location Where USTs Were Removed Leaving UST Pits

GPRS was contacted by an environmental company to perform an Underground Storage Tank (UST) search in Glassport, PA. No UST’s were located but potential UST pits were found. We know that the area marked with paint was dug up at some point due to the disturbed soil. Knowing the locations of the pits allows the environmental company to focus their soil samples around the potential contaminated locations.

For GPR projects or quotes in the Pittsburgh area or western Pennsylvania, contact Jacob Lammott at 412-292-3266, email, or visit


GPRS Locates Power and Data Lines Prior to Trenching

Ground Penetrating Radar Systems (GPRS) was requested on an undisclosed site in North Carolina to determine if there were utilities in a designated area prior to doing any excavating for trenching. During this process we were able to mark out power, and data lines in the areas where they had planned on digging. Curtis Hoag used a 400 MHz antenna along with radio detection and marked out all utilities located. The client was able to excavate the area without hitting any utilities which saved them from costly repairs.

GPRS is the largest provider of GPR services in North America. For more information, to request a quote, or to schedule your next project contact Curtis Hoag at 704-582-3219 or


Homeowner Calls GPRS to Locate a Leaking Gas Line on His Property After Several Failed Attempts on His Own

image001Ground Penetrating Radar Systems, Inc. – GPRS – of California was contacted by a home owner to locate the main gas line that enters his property. He had determined that the gas line was leaking and producing a distinctive smell. The homeowner attempted to locate the gas line by using the existing plans he was provided by the previous owner, which resulted in having several trenches in different locations around the property. He decided to leave it to the Experts in GPR and contacted Freddy Espinal with GPRS. “We were able to locate the main gas line that comes from the street and found where it 45’s into the property in less than an hour” stated Espinal. The line actually runs underneath an additional guest house and found the line at 3’ in most areas. The trenches dug up by the homeowner were nowhere near the actual findings. Upon request we marked the finding using flags on the turf in order to avoid painting it.

GPRS takes the guess work out of locating utilities or anything that cannot be seen beneath the surface. GPR is a great tool to scan concrete as well to detect post tension cables, rebar, conduits, even PVC pipes. GPRS is the largest service provider in North America with offices in every major city and in Canada. Contact Freddy Espinal at 805-729-5877 or for more information, to request a quote or to schedule your next project.

Photo of the area we found the gas line. To schedule service or obtain a quote, please contact Freddy Espinal 805-729-5877 or

GPRS Locates Utilities Along an Easement and Provides an Aerial Image

GPRS was contacted by a local contractor to locate all utilities along 2 easements. Natural gas, sewer, high pressure water and an electric lines were located successfully along the fence separating the two properties. GPRS was also able to provide an aerial image of all findings which is extremely valuable to the contractor due to the area being heavily overgrown with tall grass. After locating the utilities and taking measurements along the easements, the data was turned into a google earth aerial image.

To learn more about the capabilities of GPRS in the South Texas Gulf Region, contact Project Manager Jim Cardoza at 713-253-7072 / or Nate Loyola at 832-262-3438 /

GPRS Locates 3 Additional Underground Storage Tanks for New Business Owner

After purchasing a small store in Providence, RI, the new owner quickly discovered that the property was once a gas station. In order to open her new business the old gas storage tanks needed to be removed. In order to obtain data through proper analysis, the owner contacted Ground Penetrating Radar Systems of New England to scan the lot in order to detect the tank. GPRS detected anomalies consistent with that of UST’s and found not only one but four locations of UST’s. GPRS used a High Resolution 400MHz Antenna for the project that is able to scan concrete up to 15’ in depth with an incredible accuracy of +/- 1’ on the location and depth of the anomaly. GPRS marked the edges of the tanks on the surface and created a report so that the owner had verification Underground Storage Tanks were present in the property.


To learn more about the capabilities of GPRS in Massachusetts, Rhode Island, New Hampshire, Maine & Vermont, contact Project Manager, Josiah Blackerby at 401.340.0232 or