1. It's a Bad Idea if there is any chance that anyone will be performing work that requires a hood and is unaware of the shutdown or chooses to ignore the shutdown. In 2009, a Canadian worker DIED because he performed work with trimethylsilyldiazomomethane during a fume hood shutdown. I can't find an article that actually confirms the cause of death: https://www.cbc.ca/news/canada/nova-scotia/protective-fume-hoods-turned-off-before-lab-worker-s-death-1.798585 Likewise, workers may not be skilled or informed enough to understand that a shut down hood provides no protection. At the very least you would have to put huge signs on each hood and tape them shut. But I still would not underestimate the will of a student intent on finishing their dissertation etc. to bypass these signs nonetheless.

2. Chemicals or waste stored in the hoods (yes, yes, we all know about proper hood use vs. how they are actually used), may emit vapors, develop a leak, or undergo a spontaneous reaction/explosion that releases toxic or flammable vapors or liquids. A functioning hood could prevent such releases.

My writeup on fume hoods in the SDS HyperGlossary has various links to fume hood/ventilation considerations: http://www.ilpi.com/msds/ref/fumehood.html

Rob Toreki

======================================================

Safety Emporium - Lab & Safety Supplies featuring brand names

you know and trust. Visit us at http://www.SafetyEmporium.com

esales**At_Symbol_Here**safetyemporium.com or toll-free: (866) 326-5412

Fax: (856) 553-6154, PO Box 1003, Blackwood, NJ 08012

On Mar 30, 2020, at 10:59 AM, Dr. Joseph M. Crockett <jcrocket**At_Symbol_Here**BRIDGEWATER.EDU> wrote:

=E2=80=8BI've received the following from a colleague at another school.

The powers that be want to save money by shutting down the hoods in our building. That doesn't seem like a good idea to me and I have asked others and they agree, but no one can tell me why we shouldn't shut them down. Do you have any insights on this? Should I be concerned if all the hoods get shut down? If so, why?=E2=80=8B

I agree with the department, not the PTB, but would like more feedback

Joe C

Joseph M Crockett A LeRoy and Wanda H Baker Chair of Science Professor of Chemistry Department of Chemistry Bridgewater College Phone: 540-828-5431 | bridgewater.edu

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas

--- For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org Follow us on Twitter **At_Symbol_Here**acsdchas