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.

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

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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!


Upper Marlboro Projects That Penhall Has Worked On

GPR prevents damage by locating steel reinforcement

Upper Marlboro concrete scanningA plumbing contractor contacted Penhall Technologies for concrete scanning services to adjust 6 floor drains that had been marked and installed in the incorrect place by another company. The analyst’s job was to scan the correct areas that the contractor marked. He used the GSSI Mini XT and the HR units. The analyst was able to find and mark all steel reinforcement and any unidentified metal objects. He successfully scanned and marked most areas, but a few of the areas for floor drains were in column lines. Because of this, the client had to reconsider the proposed locations. If the client had tried to drill the drains without scanning, these drains could have caused major problems. This would of had resulted in post tension cables and rebar ultimately ruining equipment, causing safety hazards, and weakening the structure by cutting into the column line.

Locate subsurface objects during construction

Penhall Technologies was recently hired by a contractor to scan for all reinforcement and subsurface electrical lines over pan decking. The scanning area consisted of 1500 square foot. The contractor knew of the presence of post tension cable and electrical cables in the slab. He didn’t know their location exactly, and he wanted to avoid hitting them during construction. Our analysts scanned and marked all valleys and peaks of the pan decking, as well as all reinforcement in the slab. The analysts also located the electrical line, which was running through the length of the scanned area and set down into a corner of one of the valleys. After completing the scan, the analyst marked out the rebar grid in black while the electrical line in red.