Quarterly Sampling Begins in Hunt for Campus Perchlorate Source

The Army Corps of Engineers will conduct tests to determine if perchlorate in Spring Valley groundwater near Sibley Memorial Hospital comes from the same source as the perchlorate in the groundwater at AU’s campus ... Experts believe a former munitions pit on the South side of campus called Lot 18 is causing the high perchlorate levels in both locations ... Perchlorate, a dangerous chemical that can cause thyroid disorders, was used at AU during World War I to make chemical weapons.

The Kreeger Hall testing site has the highest concentration of perchlorate in Spring Valley ... The Army Corps will now sample groundwater from the area every three months because perchlorate levels in the groundwater change according to the seasons and the amount of precipitation, [project manager Dan] Noble said.
Mitch Ellmauer
The Eagle (November 15, 2010)