Commitment to Safety • Reliable Results
Responsive Resources • Established Expertise

Penhall Technologies can help you locate rebar, pipes, post and pre tension cables, conduits and many other subsurface hazards that may be hidden in concrete. Our expertly trained analysts can also detect voids within or underneath concrete slabs. As a safety leader in the industry, contractors, engineers, and government agencies have come to trust Penhall first for safe and precise scanning services.

Get a free quote today!

Where is the job located?

(*) Zip Code

(*)How did you hear about us?

What services can we assist you with?

I can confirm this is a private locate. For all public locates please contact 811.

Other Service

To better help you with your request, could you kindly provide the following information:

What are we scanning? Slab on grade, suspended slab, etc.

What are we scanning for? Ex. rebar, tension cables, conduits, etc.

What is the scanning in preparation for?

To better help you with your request, could you kindly provide the following information:

What is the surface that we are performing the locate on? Ex. Ground/Dirt, asphalt, concrete, indoor/outdoor, etc.

What are we locating? Water, gas, electrical, sewer, etc.

What is the locating in preparation for?

Contact Information

(*) First Name

(*) LastName


(*) Email

(*) Phone


What is the best way to reach you?


Other comments or project details?

Once you submit this form, a Penhall Company representative will contact you within 24 hours. Thank you for the opportunity to earn your business!

Santa Clara Concrete Scanning Projects

Locate rebar within a tilt up wall

Recently, we performed concrete scanning in Mountain View, CA. Our customer wanted to use Ground Penetrating Radar to locate all rebar within a tilt up wall. Our analyst used the GSSI Mini and located all rebar in the proposed area. Our analyst used a scissor lift which was provided by the customer to complete the scan and to mark out the rebar.

GPR scanning for a tech company

concrete scanning in San JoseRecently, we scanned several columns at a parking lot structure of a well-known tech company. The client decided to scan to avoid striking any rebar inside the columns while core drilling 12” deep. The client would later have 24” long thread anchors. These would hold up solar panels on the roof of the parking lot structure. Our analysts used the GSSI mini XT at different levels of dielectric and gains to achieve the clearest possible images. We scanned the requested depth and left no permanent markings on the columns by using tape during marking.

Scanning for rebar for hand rail anchoring

santa clara concrete scanning Recently, Penhall Technologies scanned for possible rebar within a finished wall. Scanning was needed to clear the positioning of future anchoring of hand rails. Before our service, a competitor scanned similar locations. After the customer viewed their scans, he called us to confirm and to finish the remaining scans. We make sure that our marks are clear, distinctive, and permanent or temporary depending on the job requirements.

Scan before installing solar panels

Santa Clara concrete scanningPenhall Technologies was hired for a project in Santa Clara, CA. The client needed to install new solar panels on top of two parking structures. They needed to drill through columns and post tension slabs to secure the structural steel that holds the panels in place. Having used Penhall’s scanning services in Arizona and Southern California, they again reached out and asked for Penhall to assist. Our analyst was able to identify not only the post tension cabling, but also the walls and beams under the slab to help the client adjust their anchoring system accordingly.

After inaccurate scanning results from two different companies, the client turned to Penhall Technologies

GPR used to locate multiple layered rebar Penhall Technologies was contracted to scan on the campus of a large research laboratory. The company wanted Penhall to scan a concrete slab located above one of the research rooms. They wanted to locate rebar and drill into the concrete slab without hitting it. The client contacted Penhall after having two other scanning companies scan the area.  Crews had hit the rebar that their scanner missed. Consequently, the company wanted to verify that the previous scans and find any rebar they missed.
After peeling off a rubber sealant from the top of the concrete the GPR analyst discovered that the concrete was uneven and difficult to scan. The analyst made a scanning template out of cardboard to allow the scanner to evenly roll over the area. This type of innovative work is a great example of why Penhall Technologies is the top choice for concrete scanning.

We used GPR scanning to ensure safety in 100 core drilling locations

Ground penetrating radar to find rebar, post tension cables, and conduit
Penhall went to Monterey, CA to scan 100 different locations in preparation for 5 1/2″ cores. The locations for scan were both on 6″ concrete pan deck and 6″ walls.

Locate all obstructions including rebar, post tension cable, and conduit within concrete slab

marking up findings after scanning concrete
At a location in Santa Cruz, CA, we checked for obstructions, such as post tension cables, rebar, and conduit, at three locations in preparation for 6 1/2″ cores through a 7″ concrete wall in Santa Cruz, CA.