From: Shannon Nephew <millersc**At_Symbol_Here**PLATTSBURGH.EDU>
Subject: Re: [DCHAS-L] benchmarking O2 monitoring with cryogen use
Date: Wed, 2 Jun 2021 15:00:59 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID: CAEYT+da_YRV534MJnLKCz-k3Y5MMsDJQQuB2ag6Zas5_KjpFwg**At_Symbol_Here**mail.gmail.com
In-Reply-To <9668CEA7-2549-4195-BF88-B6E07D8DD919**At_Symbol_Here**keene.edu>
Demystify:
We have oxygen monitors (PureAire monitors) in our NMR facility and in our gas cylinder tank room. Never any issues so far, but the peace of mind is definitely reassuring.
They weren't super expensive and the customer support was great.
Shannon
SHANNON C. NEPHEW,
MS, CSM
Chemical Hygiene Officer, Hudson Hall Science Complex Building Manager
Science Programs and Facilities Support Professional
> >In my experience, except for very small laboratories, or those with very low exhaust rates (like SEM labs) oxygen monitoring is not required unless the owners try to stack a 10 day supply of cryogens on hand at all times.
Or if they are storing dry ice or liquid nitrogen in a cold room, assuming that that location will extend the life of their stockpile of those items. (Fresh air in cold rooms is 0%.) We have found 16% O2 levels in those situations.
- Ralph
Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859
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