From:
Kolodziej, Christopher <ckolodziej**At_Symbol_Here**EHS.UCLA.EDU>
Subject:
Re: [DCHAS-L] Fume hood shutdown = recertification?
Date:
Jan 10, 2024 16:11 UTC
Reply-To:
ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
Message-ID:
<SJ0PR04MB77731B7E657980B62AA66C99F7692**At_Symbol_Here**SJ0PR04MB7773.namprd04.prod.outlook.com>
In-Reply-To:
<CAAszpkx3wcGO5VcFHFHQBvh6_y9YxQafsXoGKr-k9mikFakKEg**At_Symbol_Here**mail.gmail.com>
Margaret,
For us, it would depend. How was the hood turned off? Based on that, how confident are you that, when turned back on, it will return to exactly the same setpoint(s)
and pull the same volume of air? Will a quantitative flow monitor need to be recalibrated? Depending on those answers we might allow it to go immediately back into service, or we might treat it almost as a new installation and require the ASHRAE-110 to be
re-run.
Chris
________________________________
Christopher M. Kolodziej, Ph.D.
Chemical Hygiene Officer
UCLA Environment, Health & Safety
| Chemical Safety
Phone: (310) 794-5013
Book a virtual appointment
My working hours may not be your working hours. Please do not feel obligated to reply outside of your normal work schedule.
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU>
On Behalf Of Margaret Rakas
Sent: Tuesday, January 9, 2024 12:46 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: [DCHAS-L] Fume hood shutdown = recertification?
Good afternoon,
If a fume hood is 'turned off' for an extended period of time (say, 6-12 weeks) but was certified as meeting manufacturer specs for face velocity by a testing company, is it best practice/optional or required to have it recertified when
it becomes operational again, assuming there are no changes (such as a fan replacement) and is within 12 months of certification? This is a continuous volume HVAC system, not integrated into a building management system...
I realize there may be concerns about backdraft, maintaining appropriate ACH in the space, etc, which we'll have to investigate but I wanted to check specifically whether institutions would recertify. (And I agree face velocity is just
one measure of ability to capture fumes/vapors/mists).
Margaret
--
Margaret A. Rakas, Ph.D.
Lab Safety & Compliance Director
Clark Science Center
Smith College
413-585-3877 (p)
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