Martin,
The metal nasal strip is concerning to me regarding the microwave heat approach. Now I am thinking of using the moist heat method in the oven, just need to find appropriate
containers and racks.
Regards,
Brandon S. Chance, MS, CCHO
Director of Environmental Health and Safety
Southern Methodist University
We were initially thinking about using the same method until the NIOSH Guidance was released. We are now develop a protocol for Microwave Steam Heat. It presents some challenges but I think we
can overcome the issues.
Martin W. Bell, M.S. CIH CSP
Director, Environmental Compliance
Department of Environmental Health and Safety
We were preparing to start implementing the Stanford approach using a drying oven at 158F as we do not have the gaseous hydrogen peroxide setup available at SMU and it seemed
like the best approach for disinfecting a few dozen masks at a time. NIOSH however, recommends against dry heat due to degradation of filter media.
Thoughts?
Regards,
Brandon S. Chance, MS, CCHO
Director of Environmental Health and Safety
Southern Methodist University
Mike and colleagues:
Duke University Hospitals has developed a very successful method using hydrogen peroxide and have presented a webinar on the method. It has been quite successful and is very
well vetted by a highly respected group of industrial hygienists, virologists, medical doctors, etc.
Please take a listen to their approach (which is in practice today).
https://www.safety.duke.edu/news-events/webinar-n95-decontamination-using-h2o2
Zack
S.Z. Mansdorf, PhD, CIH, CSP, QEP
Consultant in EHS and Sustainability
7184 Via Palomar
Boca Raton, FL 33433
561-212-7288
From: ACS Division of Chemical Health and Safety >
On Behalf Of Wright, Mike
Sent: Wednesday, April 1, 2020 9:18 AM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!
Here‰??s the eagerly awaited NIOSH document summarizing the current situation. The paper bag method is at the very beginning. Useful tables address the other methods.
And there is a warning that none of these methods is as good as getting a new N95 after each use.
https://www.cdc.gov/coronavirus/2019-ncov/hcp/ppe-strategy/decontamination-reuse-respirators.html
Mike
Michael J. Wright
Director of Health, Safety and Environment
United Steelworkers
