GPR Concrete Scanning in Ontario, California

Ground penetrating radar (GPR) is a non-destructive scanning method that uses high-frequency radio waves to image the inside of a concrete slab, wall, or column before it's cut, cored, or drilled. Results are immediate and marked directly on the surface.

On any commercial or industrial slab built after roughly 1975, yes. Post-tension construction, embedded conduit, and buried utilities are common enough in Ontario that coring blind is a liability risk most GCs and owners no longer accept.

Reliable imaging depth is typically up to about 12 inches, and can go deeper depending on slab thickness, moisture content, aggregate density, and antenna frequency. Every slab is different — we assess conditions on-site and adjust equipment for the clearest scan possible before any cutting or coring begins.

Concrete X-ray requires access to both sides of the slab and an evacuation radius. GPR is one-sided, non-radioactive, and requires no evacuation — making it faster, safer, and more practical on active job sites.

Scanning is quoted per job. Scan area, slab type, access, how much of the floor has to be covered, and whether the work runs during the day or at night all change the number. Call (909) 519-6754 for a project-specific quote.

Yes — post-tension cable location is one of the most common and highest-stakes scans we perform. Cutting a PT cable is a serious structural event, which is why we recommend locating them before any cut begins.

The findings are marked directly on the slab in paint or crayon, and we send the GC a photo of the marked slab the same day. We do not issue a written scan report.

4-hour typical response window from our Rancho Cucamonga shop. Same-day and emergency response available. Call (909) 519-6754.

Yes. Earthworks holds California DVBE certification (#2023620), federal SDVOSB certification, CSLB General Engineering license #1031142, CA DIR registration #2000019179, and BBB Accreditation. We are prevailing wage compliant on all public works projects.