ARM geophysicists performing Digital Geophysical
Mapping survey at Langley Air Force Base |
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UXO Geophysical Survey
Client: Explosive Ordnance Technologies Inc. (EOTI)
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On September 18, 2003, a Category 2 Hurricane - Isabel struck the coast of North Carolina and severely damaged two golf courses at the Eaglewood Golf Club, Langley Air Force Base, Hampton Virginia. During renovations to restore the Eagle and Raptor Golf Courses, a 10K Type 1 Aerial Bomb was uncovered. Explosive Ordnance Technologies Inc. (EOTI) was called in to remove the ordnance and ARM geophysicists were subcontracted to identify any additional, potential ordnance in the subsurface.
ARM performed Digital Geophysical Mapping (DGM) over the two golf courses which, encompassed a total of 70 acres. The goals of the DGM surveys were to:
- Identify areas of potential contamination;
- Provide an estimate of the numbers of targets that might be encountered during a removal action; and
- Estimate the costs of such a removal action.
The resulting data allowed EOTI and it's client to make informed decisions regarding the cost impact associated with the potential contamination on this property.
ARM's survey involved the identification of single anomalies along tee boxes, fairways, bunkers, and greens on the two golf courses. The following observations were made & specific activities performed:
- No ordnance or ordnance-related fragments were visibly observed on the ground surface during any activities;
- Anomaly patterns indicating "utilities" or "clutter" areas were marked and annotated;
- 17,000+ total anomalies were selected; and
2,604 were recommended for reacquisition due to their similarity to ordnance related items of interest, with the
remaining recommended for either "no digging" or "monitoring during construction."
- In conjunction with the DGM Survey, ARM performed a Geophysical Prove-Out (GPO). The GPO test plot was seeded with inert targets to verify that the geophysics equipment could detect the UXO to the depth of interest. ARM evaluated both the Gap Geophysics Australia Pty Ltd (GAP) TM-6 Quad Magnetometer Array and the Geonics EM61-MK2 Metal Detector sensors. Based on the responses from the items seeded in the GPO, the TM-6 was selected as the best available sensor technology at that time.
If you would like additional information about this project or any of ARM's projects or services please send an e-mail to info@armgroup.net.
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