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Cause of Aberdeen Chemical Alarm Still Not Known
The source of a trace amount of mustard agent vapor detected last Wednesday in a storage building at Aberdeen Proving Ground in Maryland has still not been determined, U.S. Army officials said yesterday (see GSN, June 25). No additional vapor has been detected since the alarm, officials added. The possibility of a leak on or near the containers has been ruled out, according to an Army press release. Edgewood Chemical Activity Civilian Executive Mary Jo Civis said the investigation would continue and that it would take some time given the number of containers in the building. “There have been instances at other stockpile sites where a very small amount of vapor has leaked from a container then sealed itself and stopped leaking,” Civis said in a prepared statement. “In such cases, we are dealing with extremely small levels of agent vapor, typically well below exposure limits set by the Occupational Safety and Health Administration,” she added. Last week’s leak was the first recorded in the 60-year history of the chemical stockpile at the Edgewood Area of Aberdeen Proving Ground, according to officials (Aberdeen Proving Ground release, June 28).
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