From: John Callen <jbcallen**At_Symbol_Here**GMAIL.COM>
Subject: Re: [DCHAS-L] Experience with hood sash automatic closers?
Date: Wed, 24 Jun 2020 08:18:11 -0500
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: 831239DA-B5C6-4474-BBFD-7B4E862DDFED**At_Symbol_Here**gmail.com
In-Reply-To


Kimi,

I am not familiar with hood sash automatic closures since they came into use long after I "hung up" my last lab coat in the 1970's.

However, adding to what Meg Osterby said below in response to your inquiry, no matter what your decision is to install or not to install them, please have someone check and certify that the installation of the laboratory hood with all of its electrical connections, alarms and wiring are correct and working properly according to all specifications and meet code.

I was involved in a situation many years ago where a very old laboratory was remodeled and included new laboratory hoods with the sashes which were manually operated.  In those days, we always attached little "telltails" to the sashes to insure that the laboratory hood was working and the air flow was exhausting in the correct direction.  When the remodeling was finished and all of the research students had instructional training, we went into the laboratory to "setup shop."  In checking my two laboratory hoods I found that somehow the on/off switch for Hood A controlled Hood B and vice versa.  Apparently, the electrical wiring was crossed and had to be immediately corrected and all of the other laboratory hoods were checked as well.  If this mistake had not been addressed, it could have potentially led to trouble.

You and your staff may want to access online Pacific Gas and Electric Company's Application Assessment Report 0607, "Automatic Fume Hood Sash Closure, Demonstration and Test at: The University of California, Davis," (November 5, 2007).  This 77 page report with all of its charts, photos and appendices should be helpful to you and your staff.

Good Luck!

Be Safe and Well!

All My Best,

John B. Callen, Ph.D.
3M Personal Safety Division - Retired
ACS/DCHAS Founding Member
(312) 632-0195





On Jun 23, 2020, at 1:59 PM, Meg Osterby <megosterby**At_Symbol_Here**GMAIL.COM> wrote:

When the building that housed my chemistry lab at the institution where I taught for 17 years was remodeled several years before I arrived on the scene, the new hoods were installed onto the old vents, and the first time a sash alarm went off, the building administrator had all the wiring to the alarms REMOVED without telling anyone.  When I replaced him on his retirement, I was called into the lab by the insurance agent who was there to make sure all the safety systems were functional, and he wanted to know why he couldn't get the alarms to sound.  I said what alarms?  
Turned out that that same building admin had had the hood's power attached to the last light switch so if I 
"forgot to turn the hoods off, like when I was evaporating a flammable solvent or had a flask of chlorine gas in the hood for the next day's lab, then a janitor or security guard could make the decision to turn them off without consulting me.

My point is, just because those designers and managers and administrative people are in charge of those labs and those hoods DOESN'T MEAN THEY KNOW WHAT THEY ARE DOING.  For your own and your colleagues' and students' safety, you had better find out. It's not that they're trying to do dumb things, it's that they don't know enough of the science to realize just how stupid they are being.

Try to be tactful though.  That's not one of my strong suits, and it did eventually get me fired.  I made it 17 years, probably some kind of record for telling it like it is without worrying about stepping on toes.  I hope I'm a bit wiser today, but telling you all to watch your words and me remembering to might just be two different things.

Good luck.  This stuff can be really dangerous if done incorrectly, so do try to find out.  They need to know how to make it safe, and most of these folks don't come from science backgrounds.  My dean had never taken a hard science course since physical science in the 9th grade.  How was he qualified to supervise all the science courses?

Meg Osterby

Meg Osterby

On Tue, Jun 23, 2020, 9:38 AM Brown, Kimberly Jean <kimibush**At_Symbol_Here**ehrs.upenn.edu> wrote:
[Cross posting to IH/Lab Safety and ACS DCHAS]
Hello all:

The architect and lab-planner consultants for an energy research building on our campus have recommended the installation of fume hoods with automatic sash closers.  Being an energy-research facility, there is obviously a focus on efficiency and sustainability in the design, and this is one of the proposed ways of making the labs greener.  

Having no first-hand experience with this these, our office is concerned about the practicality of these in devices in an academic laboratory setting.  Does anyone have any hoods like this on their campus?

Kimi Brown, ARM, NRCC-CHO, CSP

Sr. Lab Safety Specialist/Chemical Hygiene Officer
215-746-6549 (Office)
215-651-0557 (Mobile/text)

EHRS is continuing to provide essential services with limited on-campus staff.  Those of us who are not on campus are working remotely to continue much of our normal operations.

Environmental Health and Radiation Safety
University of Pennsylvania
3160 Chestnut St., Suite 400
Philadelphia, PA 19104-6287


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