Potholing with Pacific Tek Vacuum Excavator Power Vac and a 4-16 inch Core Drill
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Potholing 12 inch hole with Pacific Tek PV-350 vacuum excavator on Truck Mounted with 4-16 inch Pacific Tek Core Drill. Vacuum Excavator is digging and hollowing out hole.
http://pacific-tek.com/vacuum-excavators/pv-350