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Environmental Contaminants

World Trade Center site workers not exposed to hazardous asbestos, study says

Published in Medical Letter on the CDC and FDA, June 23rd, 2002

Workers at the World Trade Center site were not exposed to hazardous levels of asbestos during weeks 2, 3 and 4 of the cleanup, according to hundreds of air samples taken at ground zero.

But health officials cautioned that the samples were taken beginning September 18 - a full week after the twin towers collapsed and after much of the huge cloud of smoke had settled.

"The piece of data we don't have is what was the exposure to these folks who got caught in the dust cloud," said Ken Wallingford, a researcher with the CDC's National Institute for Occupational Safety and Health. "That would've been a massive skin and inhalation exposure."

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