From: jeskiekb**At_Symbol_Here**comcast.net <jeskiekb**At_Symbol_Here**COMCAST.NET>
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!
Date: Wed, 1 Apr 2020 17:21:32 -0400
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 68f094j5v92ocuujf97akl9g.1585775995998**At_Symbol_Here**email.lge.com


I wish I could figure out a way to link to this, but if you are interested in what the Battelle system looks like in action, they have posted pictures of a loaded unit on the Facebook page today.

Kim

Sent from my Verizon LG Smartphone

------ Original message------
From: Chance, Brandon
Date: Wed, Apr 1, 2020 2:19 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU;
Cc:
Subject:Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!

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

 

From: ACS Division of Chemical Health and Safety > on behalf of "Bell,Martin" >
Reply-To: ACS Division of Chemical Health and Safety >
Date: Wednesday, April 1, 2020 at 12:52 PM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" >
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!

 

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

 

 

 

 

From: ACS Division of Chemical Health and Safety > on behalf of "Chance, Brandon" >
Reply-To: ACS Division of Chemical Health and Safety >
Date: Wednesday, April 1, 2020 at 1:26 PM
To: "DCHAS-L**At_Symbol_Here**PRINCETON.EDU" >
Subject: Re: [DCHAS-L] N-95 disinfection and reuse: The NIOSH Guidance has Been Released!

 

External.

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 > on behalf of Zack Mansdorf >
Reply-To: ACS Division of Chemical Health and Safety >
Date: Wednesday, April 1, 2020 at 11:46 AM
To: "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).

 

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

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