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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