From: "LaCroix, Steve (DOH)" <Steve.LaCroix**At_Symbol_Here**DOH.WA.GOV>
Subject: Re: [DCHAS-L] COVID-19 Question - Respirators
Date: Mon, 23 Mar 2020 19:52:27 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: cb4599c3892346879a85cf15a86407ad**At_Symbol_Here**DOH.WA.GOV


When recommending alterations to your respirator program and respirator use remember that N95 respirators are the lowest quality of respirators available. They are primarily designed for one time use and come in various designs. It is important that the user use them correctly and that they fit. You should consider a reusable tight fitting face piece. These can be cleaned, disinfected, etc. and reused. They are a better quality than the N95??s, easier to do a User Seal check and are usually P100 level. We have had 65+ employees in our respirator program using these for many years.

silicone
https://www.honeywellsafety.com/Products/Respiratory_Protection/7700_Series_Half_Mask_(North_Brand).aspx?site=/ca

rubber
https://www.honeywellsafety.com/Products/Respiratory_Protection/5500_Series_Half_Mask_(North_Brand).aspx?site=/ca&LangType=1033

Note silicone & rubber; S, M & L

I have included a note from Richie regarding one idea for storing N95's.

I would be happy to answer any questions that you may have.

Thanks.

Steve


From: absabiosafety**At_Symbol_Here**mail-list.com [mailto:absabiosafety**At_Symbol_Here**mail-list.com] On Behalf Of Richard Fink
Sent: Saturday, March 21, 2020 7:30 PM
To: absabiosafety**At_Symbol_Here**mail-list.com
Subject: Re: [ABSABiosafety] Decontamination of N95s
May I suggest a very gentle way to decontaminate the respirators -- time. Assign 4 N-95 per person, at the end of the day carefully remove and place in a ziplock bag. Use #2 and repeat; use #3 and repeat; use #4 and repeat. Day 5, unzip N-95 #1 and wear, it has been decontaminated. I think I would add silica gel or some other desiccant to absorb the moisture from the respirator after a day of wear. Continue this cycle until the respirator gets damaged, noticeably soiled or no longer fits properly.
Richie Fink
BSO - emeritus
Sent from Outlook Mobile


Steve LaCroix
Disease Control and Health Statistics
Washington State Department of Health
steve.lacroix**At_Symbol_Here**doh.wa.gov
206-418-5437 | www.doh.wa.gov

-----Original Message-----
From: ACS Division of Chemical Health and Safety [mailto:DCHAS-L**At_Symbol_Here**PRINCETON.EDU] On Behalf Of Monique Wilhelm
Sent: Monday, March 23, 2020 12:09 PM
To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
Subject: Re: [DCHAS-L] COVID-19 Question

A friend who is a surgical nurse has explained to me that they are using the cloth masks to cover their N-95s so that they can remove the cover mask and replace if there is a noticeable splatter incident, thereby making the N-95 masks effective for a longer period. They are then reusing the N-95 without specific instruction for storage....she asked me how to store. I have no answer.

Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Email: mwilhelm**At_Symbol_Here**umich.edu


Monique

_________________________________________________________

Monique Wilhelm, M.S., NRCC Certified CHO

ACS CHAS Secretary|2017 CERM E. Ann Nalley Award Recipient

Laboratory Manager|Adjunct Lecturer|Chemistry Club Advisor

Department of Chemistry & Biochemistry|University of Michigan-Flint

Email: mwilhelm**At_Symbol_Here**umich.edu


On Mon, Mar 23, 2020 at 3:03 PM Lawrence M Gibbs wrote:
>
> Hi Tried sending this with document attached but was rejected by site.
> So am placing a link here that I hope will get one to the site of the
> same document: Final Report for the Bioquell Hydrogen Peroxide Vapor
> (HPV) Decontamination for Reuse of N95 Respirators
>
> http://wayback.archive-it.org/7993/20170113034232/http://www.fda.gov/d
> ownloads/EmergencyPreparedness/Counterterrorism/MedicalCountermeasures
> /MCMRegulatoryScience/UCM516998.pdf
>
>
>
> From: Lawrence M Gibbs
> Sent: Monday, March 23, 2020 11:04 AM
> To: neal**At_Symbol_Here**CHEMICAL-SAFETY.COM; DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: RE: [DCHAS-L] COVID-19 Question
>
>
>
> Neal et al,
>
>
>
> Keep in mind particulate filtering respirators were developed primarily for inert particulate matter (wood dust, silica, etc.). When used in a clinical setting, the particulate matter is no longer inert, but potentially can replicate and infect individuals upon exposure (uptake). For this reason, reuse of an N-95 is not typically recommended for use in biohazard protection, as a general rule.
>
>
>
> Having said that we are entering that stage of an emergency where scarcity of the primary protective device is occurring. A number of academic clinical centers are running into the same issues and are doing some testing of methodologies for possible reuse of n-95 particle respirators. The attached is one such report on methodology for disinfection of the masks for possible reuse. Note that gas or vapor is needed to assure complete penetration of the filtrate substrate where infectious particulates may adhere. Work is currently being done by some of the regional academic bio research facilities on this and protocols being developed demonstrating the process and testing using indicator strips of the disinfection. I suggest caution on applying considerations for non-viable particulates to the current situation for N-95s or other respiratory protective equipment.
>
>
>
> Larry
>
>
>
> Lawrence M. Gibbs, CIH, FAIHA
>
> Associate Vice Provost Emeritus
>
> Stanford University
>
> lgibbs**At_Symbol_Here**stanford.edu
>
> (c) 650-387-1131
>
>
>
>
>
>
>
> From: ACS Division of Chemical Health and Safety
> On Behalf Of NEAL LANGERMAN
> Sent: Monday, March 23, 2020 10:23 AM
> To: DCHAS-L**At_Symbol_Here**PRINCETON.EDU
> Subject: [DCHAS-L] COVID-19 Question
>
>
>
> All
>
> What do you say to a healthcare provider (assume they are in your core family) who has been told to ration N95 masks. Told to reuse them.
>
> Healthcare provider wants to know about sanitizing them; about effectiveness; about building their own mask.
>
> FYI, here is some NIH published data:
>
>
>
> Reduction to exposure by virus-like particulates. Based on article
> published by NIH
>
> Mask Type % reduction of particulates
>
> N95 99
>
> SURGICAL MASK 74
>
> HOMEMADE TEA CLOTH MASK 58
>
>
>
> Also, the Elan Musk companies delivered 50,000 N95 masks to a hospital today.
>
>
>
> nl
>
>
>
> ----------------------------------------------------------------------
> --------------
>
> Safety is the practice of fixed and unbendable principles, the first of which is to be flexible at all times. Paraphrase of Everett Dirksen.
>
> The information contained in this message is privileged and confidential and protected from disclosure. If the reader of this message is not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by replying to the message and deleting it from your computer.
>
>
>
> ACSafety has a new address:
>
> NEAL LANGERMAN, Ph.D.
>
> ADVANCED CHEMICAL SAFETY, Inc.
>
> PO Box 152329
>
> SAN DIEGO CA 92195
>
> 011(619) 990-4908 (phone, 24/7)
>
> www.chemical-safety.com
>
>
>
> We no longer support FAX.
>
>
>
> Please contact me before sending any packages or courier delivery. The address for those items is:
>
> 5340 Caminito Cachorro
>
> San Diego CA 92105
>
>
>
> --- 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
>
> --- 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

---
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

---
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



The content of this page reflects the personal opinion(s) of the author(s) only, not the American Chemical Society, ILPI, Safety Emporium, or any other party. Use of any information on this page is at the reader's own risk. Unauthorized reproduction of these materials is prohibited. Send questions/comments about the archive to secretary@dchas.org.
The maintenance and hosting of the DCHAS-L archive is provided through the generous support of Safety Emporium.