Perchlorate Levels in 16 Wells Lead to Source NE of Kreeger Bldg.

Source Area #7 registered the highest perchlorate at 22 ppb

At the November Restoration Advisory Board meeting, the Army disclosed that -- in order to minimize disruption of the American University campus -- the anomalies identified during a 2½-acre geophysical survey of the Kreeger-Hamilton area last spring would be excavated over the upcoming winter break. Project Manager Todd Beckwith reported on findings from sixteen temporary wells drilled and tested for perchlorate across this identical site in July.

The highest levels detected were just northeast of and surrounding Kreeger Building: "SA 7 is where we detected 22 ppb in groundwater just a little bit upgradient of PZ 4," Beckwith announced. "SA 5, SA 3 and SA 15 also had notable concentrations of perchlorate ... it looks like we've bounded the perchlorate source area, meaning that it seems to be more confined to this area." When asked precisely what activities took place there during World War I, Project Manager Dan Noble observed: "That was the Experiment Station. There were labs and little pilot production facilities. There was a lot of activity going on right here" [SA 7].
Spring Valley RAB
Meeting Minutes
November 8, 2011 (pg. 12)

Kreeger from Hamilton parking lot; Source Area 7 is under pylon