From: "Weeks, Robert W" <rweeks**At_Symbol_Here**LANL.GOV>
Subject: Re: [DCHAS-L] Chemistry Fume Hood Experience
Date: April 30, 2013 9:39:24 AM EDT
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
Message-ID: <CAKoY-_yTC6ra4zmfcXvPYTGD00+Fyh+tbRrsN5KUBAhsUSFW8A**At_Symbol_Here**>

Yes, and please do not forget the simple trick of a strip of Kleenex taped to the bottom of the fume hood if the power goes lame or for some reason the sensors/monitors fail. The business that Mary Ellen mentioned is not restricted to fume hoods. I have certainly seen this situation w/rad monitors going off and being looked at as false alarms.  Remember Three Mile Island!





Robert Weeks, PhD, CIH

Los Alamos National Laboratory


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Mary Ellen A Scott
Sent: Monday, April 29, 2013 4:10 PM
Subject: Re: [DCHAS-L] Chemistry Fume Hood Experience


We have performed the ASHRAE test on these hoods and they all passed.   The alarms do go off frequently and so are ignored..  So I am concerned about the wolf and have stated as much in writing..  I have been asking for the monitors to be serviced.  Starting with the monitors and followed with your suggestions may be enough to move through the block.


On Mon, Apr 29, 2013 at 4:57 PM, Yung Morgan <pmorgan**At_Symbol_Here**> wrote:

For the new high efficiency hoods,   require  an Ashrae  110  test  as manufactured(AM)   and   another one  as installed (AI) for  at least 10 or 20% of the hoods  in your facility. 

Air flow alarm  visible( with numbers)  and audible are a requirement.  When testing the hoods   we  have a required that the  hoods pass at flow rate: 80 FPM(70-90FPM) at 18 inches opening  and hood alarm set at 55FPM , sash response time at 60 sec or less.   Ask for a balancing report also to be sure the supply is proper for the space as a VAV hood  will not work without enough supplied air, hence the  constant flow alarm which can be a nuisance to the occupants.   Fume hoods sensors are not always useful  as research hoods  have to run overnight  at optimum flow rates, a constant battle between the energy group and safety people.  Room occupancy sensors are fine as long as the researchers know to not to work in the dark(with the light off)  unless they want their hoods air flow to go down.   


Again, just my two cents.


Yung Morgan, MsPH
Laboratory Safety
Industrial Hygiene Services
Environmental Health and Safety
117 Draper hall
UMASS,Amherst MA 01003
phone (413)  545-2682
Fax  (413) 545-2600
email : pmorgan**At_Symbol_Here**


From: DCHAS-L Discussion List [mailto:dchas-l**At_Symbol_Here**MED.CORNELL.EDU] On Behalf Of Jim Johnson

Sent: Sunday, April 28, 2013 6:35 PM

Subject: [DCHAS-L] Chemistry Fume Hood Experience


Good Afternoon,
I would like to start a discussion on current experience with chemistry fume hoods related to overall quality, best value, interior construction, coatings/materials of construction, installation issues, air flow alarms, order lead time, energy saving features plus anything else that comes to mind.
Thank you,

James S. Johnson Ph.D., CIH, QEP
JSJ and Associates
Pleasanton, CA 94588

Mary Ellen Scott, PhD.
Safety Specialist II
Case Western Reserve University
EHS - Environmental Health and Safety
Service Building 1st Floor Rm 113
2220 Circle Dr.
Cleveland, OH 44106-7227
216-368-2236 (Fax)
“There is no science without fancy and no art without fact” – Vladimir Nabokov (1899-1977)

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