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

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!

Atlanta Concrete Scanning Projects that Penhall Worked On

Scan concrete before drilling holes into flooring

locate rebar in Atlanta We recently performed concrete scanning at a store at an Atlanta shopping mall. The store had recently undergone a renovation, but one component of the new electric system hadn’t been installed properly. This meant that it was necessary to core drill a new 2” hole through the newly installed flooring. Since the floor was already finished, the customer asked the analyst to mark the targets with tape. The scan area was initially only a 2’x 2’ square. However, post-tensioned cable bundles were found running through the top, middle, and bottom of the slab. The analyst also found a 1’x 1’ square foot of rebar mesh. With all hazards clearly marked, the contractor was able to complete the project without incident.

GPR analyst finds live wire in concrete slab

Concrete scanning in Atlanta A customer decided to scan before drilling six ½” holes into the slab of an electric switchroom. He planned to install the base of a new piece of equipment. The scan area was about 2’x 6’. The customer asked the analyst to mark all rebar and electrical conduit. We used the GSSI StructureScan Mini XT to trace out all targets. After, we used the RD 7100 to confirm the presence of live wire in the slab. We found six different electrical conduits in the scan area and a 6”x 6” wire mesh reinforcement. After completing the scan, the contractor was able to easily adjust the layout and successfully install the base without hitting any steel or live wire.

Penhall Technologies performs concrete scanning at a water treatment plant

A customer called Penhall Technologies for concrete scanning before core drilling eight locations at a water treatment plant. The cores ranged from 6”-16” in size and hitting electrical conduit in the slab was the customer’s main concern. The client needed to drill in an area where active sediment filters were in operation. This resulted in a very damp concrete surface for scanning. Since GPR can’t travel through standing water, the wet environment created a difficult condition for scanning. Taking the time to prepare each scan area was important. This task was done by using a squeegee to remove all puddling water, then sweeping away the remaining sediment. Having a dry surface clear of debris is the first step towards an accurate data collection. The data showed that nearly every location was near an embedded electrical conduit. After the hazards were marked out, the coring process went without incident.

Penhall ensures the safety of drilling anchors to bolt down a large piece of fitness equipment to the floor

scan slab before anchoring bolts to the floorAs construction reached the final stages of completion at a new apartment complex, there was one project still remaining, the gym. The customer needed to bolt down a large piece of fitness equipment into the floor. He wanted to do it without hitting any of the post-tensioned (PT) cables in the slab. The client had to secure three plates with four bolts on each plate (12 bolts total) for the equipment. The analyst used tape to mark the PT cables. If the client had decided to not call Penhall Technologies before drilling, 2 of the plates would have been centered directly over PT cables, making for a dangerous situation. With the PT cables marked out, the customer was able to easily rearrange the gym layout and safely secure the equipment. Penhall Technologies keeps your project on budget, on time, and most importantly- safe!

Penhall Technologies ensures safety with concrete scanning before installing bollards at Hartsfield-Jackson International Airport

concrete scanning before installing bollards As Hartsfield-Jackson Atlanta International Airport continues its renovation, preventative safety measures are being taken to keep pedestrians safe from the surrounding construction. On the 4th level of the North Terminal parking garage, the client wanted to take down the existing pre-cast wall along the southern side. This leaves an open edge. Previously, the client had erected a metal fence to ensure added protection. They also installed bollards. Before the installation occurred, the client asked Penhall Technologies to scan every five feet along the perimeter of the fence. The purpose was to identify any and all hazards in the slab including rebar, electrical conduit and underlying structural beams. Our analysts scanned 38 locations and confirmed the presence of electric conduit. After completing the scan, the client installed all bollards successfully with no issues. Penhall Technologies looks forward to continued work at the Atlanta Airport.

Protect against cutting rebar or conduit when performing core drilling

concrete scanning in atlanta gaPenhall Technologies completed a project for a general contractor at The Battery outside the new Atlanta Braves, Suntrust Park. The contractor needed to protect against cutting rebar or conduit when performing a core drill. The analyst used ground penetrating radar to locate the rebar. This was the perfect method for a slab on grade project, as it only requires access to one side of the concrete. To locate live conduits, the analyst used a utility wand to sweep each area for power and communication lines. Our GPR Analyst was able to provide quick and reliable results. This allowed the project to stay on time and on budget.

Penhall marks the rebar found after performing scanning

Scanning with ground penetrating radar to avoid hitting cablesPenhall performed a scan using ground penetrating radar on 6″ thick post tension slab prior to coring to avoid any cables or other structural wires in the slab at a project in Atlanta, GA.

Concrete Scanning used to check for obstructions in concrete

Concrete scanning to check for obstructionsIn Marietta, GA, we were asked to check for obstructions, such as rebar, conduit and utilities, before core drilling a 4″ hole on a 6″ tick concrete slab.

We make sure we have all the tools and antennas to ensure the most accurate concrete scan

best equipment for concrete scanningPenhall traveled north from the Atlanta office to Euharlee, GA to examine a 6′ x6′ area on a 6″ thick elevated concrete slab. We were able to find and mark rebar and post tension cables to avoid when cutting.

Our expert analysts detect hazards before cutting or drilling

At a project in Alpharetta, GA, we were asked to scan 29 separate locations prior to drilling cores of sizes ranging from 2″ – 6″ on a 5″ thick concrete slab. We were able to avoid any hazards when finally administering the drilling.