| Project Background |
| As part of an environmental site
assessment being conducted by our client at an active
fuel service station, several intrusive soil sampling
locations were specified. Geo-Graf was retained to
perform a nonintrusive subsurface delineation around each
proposed boring location in an attempt to reposition the
boring away from potential drilling hazards such as:
utilities (metallic and non-metallic), USTs and anomalous
subsurface features. |
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| Geo-Graf Investigation |
| Geo-Graf utilized 4 different nonintrusive
geophysical delineation techniques, including Ground
Penetrating Radar (GPR), Electromagnetics (EM), Radio
Frequency (RF), and Magnetics (MAG). Several of the
proposed boring locations were repositioned by Geo-Graf,
safely away from detected subsurface hazards. |
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| GPR Data Profile |
| Please Wait as
the image below loads. It is actual radar data from a
boring positioning project collected by Geo-Graf
engineers utilizing a 550 MHz GPR antenna. |
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| Above: A GPR data profile over a
proposed boring location. The profile on the left extends
from west to east over the proposed location, and the
profile shown on the right extends from south to north.
GPR detected disturbed subsoil, indicative of fill
beneath the location. No utilities were found within
proximity of this boring location, thus repositioning was
not required. |
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