| About This Archive | | DCHAS-L 2021 Index | | DCHAS-L Yearly Index | |
Check out Safety Emporium for your N95, N99, and face shield needs.
|
Previous by Date: Subject: Re: [DCHAS-L] Fume hood article of interest Date: Tuesday, August 31, 2021 at 12:12:17 PM Author: Dr Bob <drbob**At_Symbol_Here**FLOWSCIENCES.COM> |
Next by Date: Subject: [DCHAS-L] EPA Updates Aquatic Life Benchmarks for Registered Pesticides Date: Tue, 31 Aug 2021 14:39:41 -0400 Author: CHAS membership |
> >Remember though that NFPA 45 recommends you never let it go below 4 ACH even when unoccupied off hours.
Many teaching labs have a single ‰??waste‰?? hood which are kept on 24/7 to maintain some airflow through the room. They may not achieve 4 ACH that way, but teaching labs do have good control over when there is active chemical use in the lab. I suppose why this is an NFPA recommendation rather than a requirement.
- Ralph
Ralph Stuart, CIH, CCHO
ralph**At_Symbol_Here**rstuartcih.org
---
For more information about the DCHAS-L e-mail list, contact the Divisional membership chair at membership**At_Symbol_Here**dchas.org
Follow us on Twitter **At_Symbol_Here**acsdchas
Previous post | Top of Page | Next post