Ground Penetrating Radar (GPR)
Geophysical Surveys: Ground Penetrating Radar Utilities & Concrete Scanning
Non-destructive subsurface detection for safer, smarter construction decisions
At Napco, we offer state-of-the-art Ground Penetrating Radar (GPR) services designed to deliver accurate, non-destructive insights beneath the surface. Whether you’re planning a construction project, utility detection, or structural assessment, our GPR – Ground Penetrating Radar systems provide fast, reliable data to help you make informed decisions. Explore our full line of Reality Capture Services to see how we support your data collection needs.
Safety starts with seeing the unseen.
GPR Solutions or Capabilities
- Multi-frequency GPR systems: Utilizes advanced radar antennas operating across multiple frequencies simultaneously, allowing technicians to capture both high-resolution shallow details and deeper subsurface data in a single scan.
- AI-powered GPR data interpretation: Employs cutting-edge artificial intelligence to analyze complex radar scans rapidly and accurately, helping identify subsurface anomalies and features with greater precision.
- Real-time subsurface visualization: Provides immediate on-site imaging of underground or in-slab conditions, allowing project teams to view utilities and structural reinforcement instantly while scanning.
- Utility strike prevention services: Focused scanning and mapping protocols designed to locate and mark buried lines beforehand, eliminating costly utility strikes and protecting workers and infrastructure during excavation.
- ASCE 38-22 utility quality levels: Adheres to national engineering consensus standards (ASCE 38-22) to systematically classify the reliability and positional accuracy of subsurface utility data from Quality Level D up to Quality Level A.
- Concrete scanning for post-tension cables: Specialized non-destructive imaging of concrete slabs, walls, or beams to accurately map high-tension cables, rebar, and conduits prior to core drilling or saw-cutting.
- GPR for bridge deck inspection: Evaluates the structural integrity of bridge surfaces by identifying internal deterioration, delamination, and voids within concrete layers without causing traffic disruptions.
- Unmarked grave detection services: Sensitive ground-penetrating radar surveys used by cemeteries, historical sites, and forensic investigators to locate soil disturbances and undocumented burials respectfully and non-invasively.
- GPR for pavement thickness testing: Measures the precise layer depths of asphalt and concrete roadways rapidly, helping engineers assess pavement quality and plan maintenance without destructive core sampling.
What GPR Can Detect Underground and Inside Concrete
3D Ground Penetrating Radar can reveal both metallic and non-metallic features, making it ideal for locating buried utilities and embedded elements in concrete. Typical detections include electrical conduit, subsurface utility engineering (SUE), pvc pipe detection, fiber optic line locating communications lines, water, gas, and sewer/storm lines; as well as rebar, post-tension cables, voids, non-destructive testing (NDT), and anomalies that can create risk during coring or cutting.
Utility Locating and Subsurface Mapping
When utility records are incomplete—or when you need added confidence before excavation—GPR supports utility locating by imaging lines and subsurface features beneath asphalt, soil, and slab-on-grade areas. Because it can detect a wide range of utility types, it’s commonly used as part of a practical “verify before you dig” approach on active job sites. For your information Who Marks the Private Utilities on a New Jersey Job Site?
Tools and Workflow
Napco uses professional-grade GPR equipment and field workflows designed for clear visualization and practical decision-making on site. Solutions like the Leica DSX utility detection system combine portable hardware with software to help locate, visualize, and map utilities more efficiently—supporting smoother handoff from field findings to project documentation.
What is Ground Penetrating Radar?
Ground Penetrating Radar (GPR) is a non-destructive electromagnetic scanning method used to detect subsurface utilities, concrete reinforcement, voids, and other features before excavation or construction. Napco provides expert GPR scanning and reporting for construction, engineering, and utility locating projects across New Jersey, New York, and Connecticut..
Comprehensive GPR Scanning
Our team uses high-performance GPR ground penetrating radar equipment to perform thorough ground penetrating radar scanning across all types of terrain and structures. From concrete slab analysis to underground utility location, we ensure accurate data collection with minimal disruption.
GPR Survey & Reporting
With every GPR survey, we provide clear visual data and detailed reporting to support your project requirements. Whether you’re working on a site investigation or pre-construction planning, our surveys help reduce risk and improve safety.
Types of GPR
NAPCO Team provides
CONCRETE SCANNING
When you are on a project, there is always the risk of hitting conduit, post tension cable, rebar, etc. If a strike does happen to occur this can incur time and cost on the site.
CONCRETE CORING APPLICATIONS
Because concrete drilling comes at a risk, NAPCO TECHNICIANS are equipped with multiple technologies to clear areas prior to core drilling and anchoring. Upon completion of the scanning process, you will have a clear layout of the vertical and horizontal position of impediments such as post tension cables, rebar, beams, and conduits. Our scanning and imaging services can be completed on any surface including concrete slabs, walls, columns, and beams.
SAW-CUTTING APPLICATIONS
When saw cutting in a slab-on-grade scenario, locating unseen or buried objects is crucial. The risk of severing post tension cables, rebar, conduits, pipes, grade beams, or other obstructions runs high in saw-cutting applications. In order to identify these hazards, our Project Managers are equipped with multiple technologies, which includes multiple GPR antennas and a variety of other state of the art equipment. This in-depth process results in accurate information about hazards that lie in and below the concrete slab.
TRUSTED GROUND PENETRATING RADAR SERVICES IN NEW JERSEY
From one-time scans to large-scale infrastructure assessments, our ground penetrating radar systems are trusted across New Jersey and the surrounding region. We combine top-tier equipment with expert technicians to deliver dependable results on time and on budget. Discover our broader range of Printing & Marketing Services for your job site needs.
TRANSPARENT GROUND PENETRATING RADAR PRICE ESTIMATES
We understand that budget matters. That’s why we offer transparent and competitive ground penetrating radar price options based on your project’s scope and needs. Contact us today for a free quote or consultation.
FAQ About Ground Penetrating Radar
1. How does GPR work?
Question: How does Ground Penetrating Radar work?
Answer: GPR operates by emitting high-frequency electromagnetic waves into the ground. When these waves encounter materials with different electrical properties, they are reflected back to the surface. The GPR system captures these reflections to create images of subsurface structures, aiding in the detection of utilities, rebar, and other buried features.
2. What can GPR detect?
Question: What can Ground Penetrating Radar detect?
Answer: GPR is capable of detecting a wide range of subsurface features, including utilities (water, gas, electrical lines), rebar, post-tension cables, voids, and other anomalies within concrete slabs, walls, columns, and beams. It provides real-time imaging to help identify potential hazards before drilling or cutting.
3. How deep can GPR penetrate?
Question: How deep can Ground Penetrating Radar penetrate?
Answer: The depth of penetration of GPR depends on factors such as soil type, moisture content, and the frequency of the radar waves used. In ideal conditions, GPR can penetrate depths ranging from a few inches to over 30 feet, allowing for the detection of deep-seated utilities and structures.
4. Is GPR safe to use?
Question: Is Ground Penetrating Radar safe to use?
Answer: Yes, GPR is a safe and non-invasive method for subsurface exploration. It emits low-frequency electromagnetic waves, similar to those used in cell phones, and poses no known health risks to operators or bystanders.
5. How accurate is GPR?
Question: How accurate is Ground Penetrating Radar?
Answer: The accuracy of GPR depends on several factors, including the type of material being surveyed, the frequency of the radar waves, and the skill of the operator. While GPR provides high-resolution images, it’s essential to interpret the data correctly to ensure accurate results.
6. What industries use GPR?
Question: What industries use Ground Penetrating Radar?
Answer: GPR is utilized across various industries, including construction, civil engineering, archaeology, environmental studies, and law enforcement. It’s particularly valuable for locating utilities, assessing structural integrity, and conducting archaeological surveys without disturbing the site.
Explore our other Reality Capture Services to find the perfect solution for your project: 3D Scanning, Drones & Job Site Cameras, Layout Tools.
Deliverables NAPCO can provide from Ground Penetrating Radar
FIELD MARKINGS
NAPCO provides continuous communication from start to finish. For concrete imaging, our customized field markings—using paint, markers, or crayons—clearly and accurately display embedded rebar, conduits, and post-tension cables, ensuring complete clarity for everyone on site.
CAD DRAWINGS
Clear communication is essential on any job site. To ensure complete subsurface damage prevention, NAPCO's Deliverables Department turns scan findings into detailed CAD drawings. These permanent records help contractors and owners safely preplan, execute precise core drilling or cutting, and maintain an accurate history of site modifications.
3D MODELING/VIRTUAL WALK THROUGHS
Our 3D CAD Drawings help provide a better visual representation of reality for clients. These realistic 3D CAD files document the vertical and horizontal elevations, providing a more accurate, easier to read visual than your standard 2D cad file or sketch. Napco BIM/CAD Team can provide models and walk throughs if desired.