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A HPT probe is advanced into the subsurface. The downhole probe transmits a continuous log of soil hydraulic and electrical properties to the surface through a cable connected to the HPT Controller and displayed on the FC5000 Field Insturment. |
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(photo at left, top to bottom )
FC5000 Field Instrument
HPT Controller,
and HPT Pump |
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A Geoprobe R&D Team used the new HPT system and Pneumatic Slug Test Kit at a former LUST (leaking underground storage tank) site in Monona, WI. The old, leaking fuel tanks had been removed. In cooperation with the Wisconsin Department of Natural Resources (WI DNR), the U.S. Environmental Protection Agency (US EPA), Emporia State University in Emporia, KS, and the U.S. Geological Survey, Team Geoprobe helped to characterize subsurface soil. The HPT system was used with the Geoprobe 6625CPT machien to define potential contaminant flow paths and to determine where to run slug tests. |
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The HPT Probe was designed to withstand percussion probing. Here, Steve Knobbe centers the HPT probe under the GH62 hammer on the Geoprobe® 6625CPT machine. A Drive Cushion is used to spread the force of each hammer blow over a longer amount of time, increasing tool life. |
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Steve Knobbe, HPT Design Engineer, reviews information displayed on the FC5000 Field Instrument after the completion of this interval of the push. Data analyzed from the logs can help customers quickly identify potential contaminant migration pathways, determine where to set temporary wells for slug testing, and identify zones for the injection of remediation materials. |
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Dustin Inskeep, a member of the Geoprobe® field team, prepares to advance the HPT probe another 4 ft. The field team was in Monona, WI, at a former LUST site to characterize the subsurface. |
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