GPRS: 15 Years Strong


“Our mission is to provide the best opportunities and development for our team members while delivering a sensational experience to our customers, preventing them from experiencing the problems associated with unknown subsurface elements.”

Founder and President, Matt Aston established GPRS in 2001 as the sole technician, salesman and office admin. Two more technicians were hired and GPRS quickly expanded throughout Ohio and Michigan. Today there are over 130 technicians across the US and Canada, led by 9 Regional Directors. In December of 2014 GPRS built their new offices which included a state of the art training facility. Every technician attends an intense two week program, then returns to the field to shadow a senior technician for several months and ultimately works independently.

The timeline below illustrates how quickly GPRS has grown over the last 15 years, spanning the entire U.S. In 2015 GPRS, Enterprises was established in Toronto Canada, which continues to grow and today there are 4 technicians expanding the Canadian market.

15 Year Summary w_Timeline

GPRS is Committed to the Highest Level of Safety

From new hire to company President – everyone at GPRS is responsible for job site safety.  We believe our safety vision defines who we are and our safety records set us apart. Contractors in the central Florida area and Orlando know to call GPRS when they need to know what lies beneath the surface of concrete. They trust us to keep their jobsite safe and their project on time and within budget.

One of those contractors was planning to install new support beams within a large concrete structure. They needed multiple surface areas scanned adding up to roughly 720 square feet that was located forty feet high and could only be accessed by scissor lift.  They reached out to GPRS to scan the concrete to locate rebar, post tension cables and all unknown reinforcing steel.

GPRS worked together with the contractor and decided to use a specialty GSSI built scanner that is specifically designed to scan large concrete surfaces located in high places. The scope of the project lasted two full days of working on the lift.  Once the scanning was complete the GPRS technician marked all findings on the surface with permanent marker and discussed the results with the engineer so they could determine how to layout the anchors to support the weight of the beams. The beams were successfully installed in the concrete structure without incident.

For more information, to request a quote or to schedule your next project contact Nathan Schmoe at 407.232.5602 or  For a complete listing of our nationwide locations, visit

August eMagazine Cover Pic

New Construction Requires GPRS to Locate Post Tension Cables

GPRS was contacted to locate post tension cables at a newly constructed hotel in downtown Atlanta. An awning is being installed and the location of the post tension cables needed to be properly identified so that they were not hit during the installation process.

With the 1600 MHz antenna, GPRS technician Patrick Moulin was able to scan the area.  The 1600 MHz antenna will typically reach depths from 15”-20”.  A SIR-3000 computer system is what displays the data for interpretation. This project required precise and well defined markings; GPRS was able to properly locate the post tension cables and rebar.

For more information, to request a quote or to schedule your next project contact Patrick Moulin at 770.713.7697 or  For a full listing of our nationwide locations, visit

NewConstruction Requires GPRS to Locate Post Tension Cables

GPRS of Dallas Locates PT Cables and Keeps Project Safe and On Schedule

This GPR scan took place on an elevated concrete slab at the new Toyota Headquarters in Plano, TX. The customer needed to install 150 brackets for reinforcement of the glazing of the building. The concrete slab was reinforced with post tensioned (PT) cables which can cause serious injury or damage if struck during drilling. The PT cables needed to be clearly marked before the customer could drill holes for the anchors.

David Hagenmayer with Ground Penetrating Radar Systems, Inc., was contracted to scan the area requested and mark out all PT cables and obstructions in the concrete. David was able to determine the precise locations of the existing lines. The client was then able to safely and effectively drill.

GPRS, Inc. of Dallas is the most trusted concrete scanning company because of its highly trained and dedicated technicians. We are the best at what we do because it’s all we do. Ground Penetrating Radar is cost effective, non-hazardous, and provides data in real time. For GPRS services in North Texas please call (972) 922-0223 or email

GPRS of Dallas Locates PT Cables and Keeps Project Safe and On Schedule GPRS of Dallas Locates PT Cables and Keeps Project Safe and On Schedule

GPRS Provides Peace of Mind for Crews on Wind Farm

GPRS was recently contacted by a large energy corporation to locate underground utilities at one of their new wind projects in Oklahoma.  The work consisted of using radio detection and ground penetrating radar to locate and mark out utilities that were along the collection lines, transmission lines, and turbine sites on the wind farm.  Andy Dermer – GPRS Oklahoma – performed the work by scanning the designated areas and marking the locations of utilities directly on the ground with marking paint, pin flags, and wooden stakes.  These findings were also recorded to be used in a Google Earth file for future reference.  With renewable energy on the rise, Ground Penetrating Radar can be an invaluable tool to help keep the site safe.  Due to the instantaneous results GPRS can provide, the information is immediately available to prevent accidents or injury on the job site.

“GPRS has done another outstanding job providing subsurface engineering work across Northern Oklahoma locating several pipelines that had been otherwise forgotten about over the years, and providing the crews a peace of mind that they can dig safely. The GPRS team has shown dedication to their craft, an impressive work ethic while operating in harsh conditions and most importantly displaying exceptional communications skills that are vital to building a successful windfarm.”

Dave Hazel
Energy Renewal Partners, LLC

For rebar locating in Oklahoma: Oklahoma City, Midwest City, Bethany, Moore, Guthrie, Norman, Stillwater, Enid, Yukon, Shawnee and Edmond area call 405.439.6787 or email

Andy Dermer_Wind Farm

GPRS Hired to Conduct Investigation to Verify Existing Underground Storm Water Detention System

Ground Penetrating Radar Systems, Inc. (GPRS) was recently called to a project in Ann Arbor, Michigan.  The purpose of the investigation was to verify an existing underground storm water detention system.  In order to obtain proper building permits to move forward on the construction project, the contractor had to prove that the system was installed per engineering specs.  Rather than dig up and potentially compromise the system, the contractor called GPRS for help.  For the GPR portion of the survey, a 400MHz antenna with the SIR-3000 processing unit manufactured by Geophysical Survey Systems, Inc, (GSSI) was used.  The average effective penetration depth encountered during the GPR survey was approximately 8.0 feet below ground surface (bgs).  The GPR survey area was conducted in an east/west and/or north/south direction using approximate 5.0 foot surface grid spacing.

Site Plan Depicting the Survey Area and Findings (Note: Measurements are Approximate)

GPR Data Screen Shots (Note due to screen limitations, two screen shots were required to display entire retention system)


View of survey area facing northwest.  Note laterals identified in the field with orange paint and white flags.

View of Brian Chmielewski conducting GPR survey and marking laterals with orange paint and white flags.

Additional view of Brian Chmielewski conducting GPR survey using the 400 MHz GPR antennae.

GPRS, Inc. also has the capabilities of locating conduits, rebar, and post tension cables in a concrete slab.  For more information, to request a quote or to schedule your next project, please contact Brian Chmielewski at 517.512.0018 or by email at  For a complete listing of our nationwide locations visit

GPRS Rises Above Obstacles to Determine a Safe Location to Core Drill for New Conduit

Ground Penetrating Radar Systems, Inc. – GPRS – of Southern California was contacted by an electrical company to locate rebar in a wall prior to core drilling for (1) 2” conduit. The area on the wall was limited due to the metal studs that were in place; we referred to using our Palm antenna rather than our 1600MHz antenna since it is suited for tightly spaced areas. We found that the wall was 14” thick and had 2 layers of rebar; we were able to easily map out a 1’x3’ area and provide the client with multiple coring options where they could drill without damaging the structural integrity of the wall.

GPR mapping is a great tool to scan areas of post tension cables, rebar, and conduits; it can also be used to locate underground utilities prior to digging or excavating. GPRS has offices throughout the entire state of California and performs GPR projects throughout the entire state, including cities like Ventura, Santa Barbara, Thousand Oaks, San Luis Obispo, Bakersfield, Lancaster and the greater Los Angeles area. For more information, to request a quote or to schedule your next project, please contact Freddy Espinal at 805-729-5877 or For a listing of our nationwide locations, visit

March 2016 Cover Pic

Reinforcement in Concrete Walls Detected at the Ole Miss Stadium

Ground Penetrating Radar Systems, Inc. of Memphis, Tennessee was contacted by a general contractor for a project to expand stadium seating in the Vaught-Hemingway Stadium at the University of Mississippi. Two pre-cast concrete walls located on the south end zone were scanned for reinforcement by GPRS. A GSSI 1600 MHz antenna was utilized for this scope of work. All findings were marked directly on the concrete surface for the contractor who was then able to determine where to drill, without compromising the integrity of the wall.

Ole Miss Stadium Scan_Zach Bates

GPRS is the nation’s largest company specializing in the locating underground utilities and scanning concrete structures, using non-destructive testing equipment. Using GPRS offers a safe, cost effective way to safely drill or cut keeping your projects on time. Other services we offer are underground storage tank locating, void detection, and GPRS can provide global positioning system (GPS) technology for use on your locating projects, such as environmental surveys and the detection of underground utility layouts.

For more information, to request a quote or to schedule your next project in the Memphis market contact Zach Bates at (901) 233-9964 or email at For a full listing of our nationwide service providers, visit