From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of "Bell,Martin" <mwb32**At_Symbol_Here**DREXEL.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Wednesday, April 1, 2020 at 12:52 PM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!
Martin W. Bell, M.S. CIH CSP
Director, Environmental Compliance
Department of Environmental Health and Safety
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of "Chance, Brandon" <bchance**At_Symbol_Here**MAIL.SMU.EDU>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Wednesday, April 1, 2020 at 1:26 PM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!
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
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU> on behalf of Zack Mansdorf <mansdorfz**At_Symbol_Here**BELLSOUTH.NET>
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Date: Wednesday, April 1, 2020 at 11:46 AM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!
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).
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 <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
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.
Mike
Michael J. Wright
Director of Health, Safety and Environment
United Steelworkers
412-562-2580 office
412-370-0105 cell
"My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we'll change
the world."
Jack
Layton
No. Some disinfectants are toxic if inhaled, they may compromise the integrity of the melt-blown fabric that the facepiece uses, and five days should be enough
to sufficiently degrade the virus. However, I was only reporting what I=E2=80™ve heard NIOSH is concluding. The guidance document isn=E2=80™t out yet.
Michael J. Wright
Director of Health, Safety and Environment
United Steelworkers
412-562-2580 office
412-370-0105 cell
"My friends, love is better than anger. Hope is better than fear. Optimism is better than despair. So let us be loving, hopeful and optimistic. And we'll change
the world."
Jack
Layton
Maybe spray it with a disinfectant spray before placing in the bag
