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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.

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

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

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

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

What is the size of the area that needs to be scanned in square feet or linear feet?

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

How many utilities are running through the proposed scan area?

Do we have access to meters or utility boxes?

What is the locating in preparation for?

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


Penhall helps to keep the integrity of a concrete column by locating the rebar before beams were installed

Keep the integrity of column with concrete scanningPenhall Technologies was asked to perform a concrete scan of columns before installing beams. The hazard they were looking to locate was rebar. The customer did not want to compromise the integrity of the columns by hitting the rebar. The GSSI StructureScan Mini was used to scan an area approximately 3ft by 5ft on 7 columns. Results showed several objects with a pattern of rebar both vertically and horizontally. The results were marked as shown allowing the customer to safely decide where to cut. Let Penhall Technologies save you time but not guessing, but rather knowing where to avoid cutting or coring.

Penhall Technologies uses a number of tools to not only locate rebar and conduit, but also confirm power in the conduits found

locate rebar and conduit and determine powerPenhall Technologies was asked to locate any potential hazards in a building before any coring was done to put in new pipes. Hazards the client was looking for were rebar and conduits. The GSSI StructureScan Mini and RD 7100 were used to scan the one- two foot by two foot area. Results showed several objects with a pattern of rebar and one object with a pattern of a conduit. The hazards were marked out and the RD 7100 was used to confirm power.

Locate hazards, including post tension cables, rebar, and conduit, before drilling a complex designed building

Concrete scanning in richmond vaPenhall Technologies was asked to locate any potential hazards in a building in Richmond, VA before any coring was done. The type of hazards they were looking for were rebar, tension cable, and conduits. The GSSI StructureScan Mini and RD 7100 were used to scan the 24 two foot by two foot areas. The building itself had many odd angles, which mainly had it have pointed, triangular shaped sides. In these areas in the concrete there were many embedded objects. The shape of the building also meant that the objects would run parallel and perpendicular to some walls, and other objects would be at a 45 degree angle to other walls. The hazards were marked out and the RD 7100 was used to confirm power. The customer was very happy that work was done since it turned out to be very complex in design.

A combination of GPR and Radio Detection used to complete project in preparation for drilling

GPR and utility wand used before drillingPenhall Technologies completed a project at a government building in Richmond, Virginia. A customer needed to core drill three 38” holes to install drains. A GSSI StructureScan Mini was used to collect data in 19 2’X2’ areas around the desired locations. To check for live conduits, a utility wand was used to sweep each area for power and communication lines. The results showed rebar in each area which were marked out. The customer was able to lay out the holes in between the rebar which went according to plan.

Determine if there are hazards before saw cutting into concrete

determine hazards before saw cutting usng GPRRecently, a construction company hired Penhall Technologies to scan an area in a large jewelry retailor store, in Richmond, where they wanted to saw cut two trenches. The company wanted to know the location of any hazards in the concrete prior to saw cutting. We used the GSSI StructureScan Mini to scan the areas and followed up by performing sweeps with our radio detection device (RD 7100), which will pick up any live power. The results showed only possible wire mesh which means the trenches could be cut without fear of hitting a hazard. The project was completed in a safe and non-destructive manner. Penhall Technologies of the Richmond area has the capability and the man power to meet your needs in a timely manner, ultimately ensuring your projects get finished safely and on time.

Locate obstructions before concrete core drilling

Ground penetrating radar to scan and locate obstructionsFor a customer in Hopewell, VA, Penhall was requested to perform scanning for four different locations. We used ground penetrating radar to locate any obstructions before drilling a 4″ x 3″ core.

Ground penetrating radar used to locate rebar in a concrete dam

gpr scanning used to locate rebar in a concrete damFor this project Penhall traveled to Petersburg, VA. We were asked to use ground penetrating radar to scan a dam for rebar. The dam was scanned so that core drilling could take place.

Concrete scanning used to ensure safety when cutting concrete

Scanning before cutting into concreteAt a location in Newport News, VA, Penhall used ground penetrating radar to inspect a section of concrete in a 1′ x 8′ area. We were able to locate conduit to ensure that cutting into the concrete would be safe.