| Project Background |
| The 2-acre project site located in New Jersey contained an active car dealership. Prior to a pending property sale, an environmental site assessment was conducted by our client. Archival mapping (Sanborns) were found indicating the existence of buildings and associated underground storage tanks (USTs) along the street, where a new-car lot is now located. In order to determine whether these buried tanks still existed, GGI was retained to perform a minimal impact, nonintrusive geophysical investigation. |
| Geo-Graf Investigation |
| Our crew was on-site for one day and performed a nonintrusive subsurface investigation without disruption to the active car dealership. The nonintrusive delineation techniques used included: Ground Penetrating Radar (GPR), Electromagnetics (EM), Radio Frequency (RF) and Magnetic (MAG) geophysical instruments. Detected USTs were field-marked on-site and documented with reference to existing site landmarks for inclusion in our standard Geophysical Investigation Findings Report. |
| GPR Data Profile |
| Please Wait as the image below loads. It is actual radar data of a UST collected by Geo-Graf engineers utilizing a 550 MHz GPR antenna. |
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| Above Left: A GPR data profile over
the width of a buried tank, indicative of a 4' wide
steel-walled tank. Depth to the top of the tank based on
GPR data estimates is 1' to 2' below cover. 550 MHz GPR
antenna system, edited from 40ns range. Above Right: A GPR profile over the length of the same tank, approximately 8' long. |
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