T&A Survey B.V. has a new tool for subsurface investigations, the TISA 2D Borehole Radar (2D BHR). It can deliver enhanced data about the subsurface in areas where traditional surface radars can’t penetrate.

“Dense urban environments present different challenges than open unobstructed areas where GPR is most often used,” says Robert van Ingen, managing director of T&A Survey. “What if the buried object is under a concrete slab or under a building? TISA 2D BHR has the ability to aid the search and the recovery of such targets.”

Unlike conventional surface ground penetrating radar (GPR) systems, the TISA 2D is designed to be positioned inside a borehole, directly in the medium of investigation. The radar is able to collect data from much greater depths because its measuring depth is limited only by the depth of the borehole.

The TISA 2D also differs from traditional radars in that it probes the surface in a perpendicular plane to the borehole direction. Vertical boreholes create a horizontal plane of investigation, allowing subsurface data to be collected directly below buildings and other surface constructions. This is usually impossible with typical GPR systems.

T&A Survey’s new radar has been used for sinkhole detection, locating concrete walls and unexploded ordnance (UXO).

T&A Survey B.V. is an Amsterdam-based subsurface research company that specializes in geophysical and geological studies of the subsurface. The customer base includes Dutch engineering companies, building contractors, oil and gas companies, and regional and national authorities.

For more information, visit www.ta-survey.nl.