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Previous by Date: Subject: Re: [DCHAS-L] HCl concentration and hazard Date: Friday, March 3, 2017 at 6:29:26 PM Author: "Wilhelm, Monique" <mwilhelm**At_Symbol_Here**UMFLINT.EDU> |
Next by Date: Subject: Re: [DCHAS-L] Toledo, OH fire Date: Fri, 3 Mar 2017 16:34:28 -0800 Author: davivid |
Ooo - I'd be concerned about that. Very.
Had a situation once where the under-hood flam storage cabinet was vented directly into the fume hood, through the work surface, behind the baffles. The vent material was Polypropylene, which supports combustion, creating a fire pathway directly into the flam cabinet, if a fire were to develop in the fume hood.
I made them remove the vent, cap and seal the holes in the work surface with epoxy and then vent it directly into the exhaust above the fume hood. And then worked closely with the Fire Marshal to create the document I referenced earlier.
If it's too expensive to do it correctly, then it will be even more expensive to correct it when Something Bad happens later.
My $0.02 worth.
Debbie
-----Original Message-----
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Chance, Brandon
Sent: Friday, March 03, 2017 3:28 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] Venting UNDER HOOD Flammable Cabinets
Ralph, you hit it on the head.
My thoughts on this are that labs that are using the under hood cabinets for flammable storage are storing relatively small amounts (relative to full size storage cabinets, which I would not vent) and in many cases are storing secondary containers of various shapes, sizes, and seals. Not to mention, due to ease in access, researchers tend to store everything under the sun in the cabinets.
From an exposure standpoint, I would rather them be vented and in most cases, due to cost, they are not going to be vented directly to the outside per NFPA 30, but vented behind the hood baffles with the little inexpensive vent kits that manufacturers provide.
Insofar as the stakeholders, every research I have ever asked wants them vented so that they don't stink.
Regards,
Brandon S. Chance, M.S., CCHO
Associate Director of Environmental Health and Safety Office of Risk Management Southern Methodist University PO Box 750231 | Dallas, TX 75275-0231
T) 214.768.2430 | M) 469-978-8664
bchance**At_Symbol_Here**smu.edu
"‰?| our job in safety is to make the task happen, SAFELY; not to interfere with the work‰?|' Neal Langerman
On 3/3/17, 4:15 PM, "ACS Division of Chemical Health and Safety on behalf of Stuart, Ralph" >> >I have read a number of other university design standards and they are also inconsistent. --- ---
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>I have seen similarly inconsistent approaches to this question from project to project even within the same institution with a single design standard.
>
>In my mind, it's a classic capital costs vs. operating costs question, as installing compliant vents for a flammable cabinet requires the expense and time of finding a protected route to the building's exhaust point. On the other hand, skipping the venting means that inventory control of the contents of the cabinet becomes very important to protect the quality of the stored chemicals and the exposure of the lab workers to unpredictable chemical emissions. So I think that the outcome of this discussion, as with so many lab design questions, will depend on the project budget and the relative priorities of the stakeholders in the design process.
>
>Good luck!
>
>- Ralph
>
>Ralph Stuart, CIH, CCHO
>Environmental Safety Manager
>Keene State College
>603 358-2859
>
>ralph.stuart**At_Symbol_Here**keene.edu
>
>---
>This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
>For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org
This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org
This e-mail is from DCHAS-L, the e-mail list of the ACS Division of Chemical Health and Safety.
For more information about the list, contact the Divisional secretary at secretary**At_Symbol_Here**dchas.org