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GeoModel, Inc. conducts surveys for locating underground storage tanks (USTs) using various geophysical methods. The most common methods used to locate USTs are ground penetrating radar (GPR) and electromagnetic (terrain) conductivity (EM).

Ground Penetrating Radar Surveys

GeoModel, Inc. has conducted ground penetrating radar (GPR) surveys at numerous sites for locating USTs using a GPR digital control unit and various transducers (antennas).

The underground storage tank can be made of metal or any other material that has different electrical or conductive properties than the surrounding subsurface soils or rocks.

Ground penetrating radar operator conducting GPR survey with a 400-MHz antenna (above left), and locations of underground storage tanks (USTs), located using GPR, painted on the ground (above right)

AutoCAD map or .pdf drawing of locations of USTs (above left), and UST being removed from ground (above right).

Electromagnetic Conductivity (Metal Detection) Surveys

GeoModel, Inc. has conducted numerous electromagnetic conductivity (EM) and metal detection surveys to locate metal USTs. Geophysicists operating the EM instruments and a contour map indicating the location of a steel UST are shown below:

GeoModel, Inc. uses the new EM metal detector which is more accurate than the standard EM metal detector.

Other buried metal objects, such as buried drums and buried utility lines, can also be easily located with the EM instruments.

GeoModel, Inc. was founded in 1991 as a geophysical services and environmental consulting firm. The company principals have over 50 years of combined experience and have conducted numerous surveys to locate USTs worldwide. All projects are conducted by registered professional geologists.

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