I agree with Doug and an earlier respondent. Even those with advanced degrees and years of experience routinely misuse their hoods. Perhaps a smoke test to demo hood failure due to clutter or even a gas with an unpleasant odor to drive home the exposure risk of poor use habits. -----Original Message----- From: Doug Walters [mailto:waltersdb**At_Symbol_Here**EARTHLINK.NET] Sent: Tuesday, March 16, 2004 1:49 PM To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU Subject: Re: [DCHAS-L] Safety course material The fundamentals of laboratory ventilation and proper hood use. These topics are almost never covered. Hoods are deceptively simple devices that few scientists understand. Hoods and ventilation are our first line of engineering defense in laboratory protection. Doug Walters, Ph.D., CSP ****************************************************************************
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