2005 CPEO Military List Archive

From: Lenny Siegel <lsiegel@cpeo.org>
Date: 7 Oct 2005 16:57:30 -0000
Reply: cpeo-military
Subject: [CPEO-MEF] Spring Valley (DC) perchlorate readings
Low Toxin Levels Seen in NW Water
Tests Show Some Perchlorate and Arsenic in Wells in Spring Valley, Officials Say

By Susan Levine
Washington Post
October 7, 2005

The most extensive testing to date for groundwater problems in Northwest Washington neighborhoods contaminated by World War I munitions has found low levels of perchlorate and arsenic but no chemical warfare agents or explosives, officials announced yesterday.

A network of monitoring wells, installed this summer in the latest chapter of a contentious multimillion-dollar federal cleanup of the Spring Valley community, detected the two potentially harmful substances just east and south of the Dalecarlia Reservoir. The groundwater sampling is intended to determine any danger to the reservoir and the Washington Aqueduct, which supply drinking water to more than 1 million people in the District, Arlington County and Falls Church.


The results released yesterday said that the summer's highest reading for perchlorate, a chemical used as a stabilizer in weapons and explosives, was found in a sump on the grounds of Sibley Memorial Hospital. Although the quantity was less than half the 58 parts per billion that provoked such concern at the same location two years ago, it still measured 24 ppb.

A perchlorate level of 10.6 was detected in a monitoring well just northeast of the hospital, though other wells in the immediate vicinity showed levels a fraction of that or that could not be measured.


For the entire article, see

Lenny Siegel
Director, Center for Public Environmental Oversight
c/o PSC, 278-A Hope St., Mountain View, CA 94041
Voice: 650/961-8918 or 650/969-1545
Fax: 650/961-8918
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