Jun 11, 2011

Army Drilling 15 Wells to Pinpoint Perchlorate Source Near Kreeger

Perchlorate source area characterization and deep well installation will tentatively begin in June 2011. The 15 new temporary wells on AU‟s campus will be installed between the location where the highest perchlorate levels in Spring Valley were detected, and an existing up gradient well with low perchlorate levels ... The groundwater sampling results taken from the new temporary wells and the geophysical survey results from the area around Kreeger Hall will be evaluated to identify potential perchlorate source areas.

Well #5 will be 15 feet north of highest perchlorate detections
Prior to installing temporary wells, each borehole location will be cleared to a depth of 10 feet using an air spade to ensure that utilities are not impacted by drilling activities ... Split-spoon samples (extending the length of the temporary well) will be collected and analyzed, along with one groundwater sample and one soil sample, approximately 10 to 15 feet below ground surface, from the borehole locations.

Well #9 will be 30 feet east of highest perchlorate detections
The perchlorate source area investigation is a separate effort where temporary wells will be drilled, installed, sampled, and abandoned in the same day.
Todd Beckwith, USACE
Restoration Advisory Board Meeting
May 10, 2011

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