From: Randy Norman <00000597ac46be7f-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] O2 Sensor Determination
Date: Wed, 18 Jul 2018 16:49:20 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 933373400.302256.1531932560694**At_Symbol_Here**
In-Reply-To <001901d41ea0$a3763260$ea629720$**At_Symbol_Here**>

It has been some time since I had to look into this, but I came at the problem looking at cryogens in our operations and found this web page from the Lawrence Berkeley National Labs' online EHS Manual to be a great help. I like their recommended method and tool for evaluating Oxygen Deficiency Hazards. Might be interesting to hear any criticisms anyone may have. May be worth a read...

PUB-3000 Chapter 29 | SAFE HANDLING OF CRYOGENIC LIQUIDS | Revised 08/12 (Links updated 03/15)

Randal O. Norman, ASP


From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Jeffrey R.. Cogswell
Sent: Tuesday, July 17, 2018 2:54 PM
Subject: [DCHAS-L] O2 Sensor Determination


Does anyone have a good reference for determining when a room needs an O2 sensor? I'm looking for an amount of liquid gas (nitrogen, argon, helium) vs cubic feet calculation. (We're assuming total catastrophe here: no ventilation and all the cryo-liquid escapes). Dartmouth is looking at doing an overhaul of all the O2 sensors on campus. Facilities will oversee maintain/scheduling of these sensors and require a "hard and fast" rule from EHS to justify their installation..


Jeffrey R. Cogswell, Ph.D.

Chemical Inventory and Laboratory Resource Center Technician, EHS

37 Dewey Field Road, HB 6216

Hanover, New Hampshire 03755

P: 603.359.0128  F: 603.646.2622

Dartmouth Environmental Health and Safety

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