From: Monona Rossol <0000030664c37427-dmarc-request**At_Symbol_Here**LISTS.PRINCETON.EDU>
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity
Date: Tue, 30 Jun 2020 20:30:00 +0000
Reply-To: Monona Rossol <actsnyc**At_Symbol_Here**CS.COM>
Message-ID: 1581741111.440800.1593549000959**At_Symbol_Here**mail.yahoo.com
In-Reply-To


I think that says a lot about astronauts and their great physical condition and training.  Very interesting.  Betcha a nickel they compensate under physical stress and that's what happens at 2500 ppm.   Monona


-----Original Message-----
From: Yaritza Brinker <YBrinker**At_Symbol_Here**FELE.COM>
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Sent: Tue, Jun 30, 2020 1:50 pm
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity

Interesting...

Effects of acute exposures to carbon dioxide on decision making and cognition in astronaut-like subjects
npj Microgravity (2019) 5:17 ; https://doi.org/10.1038/s41526-019-0071-6
https://www.nature.com/articles/s41526-019-0071-6.pdf?proof=true&draft=collection

Thank you,

Yaritza Brinker
260.827.5402

-----Original Message-----
From: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**Princeton.EDU> On Behalf Of Stuart, Ralph
Sent: Thursday, June 25, 2020 2:41 PM
To: DCHAS-L**At_Symbol_Here**Princeton.EDU
Subject: Re: [DCHAS-L] Sars-CoV2 infectivity

** External Email **

> >All I know is the PEL at 5000.  Where does this reasonable target come from?

The OSHA Technical Manual Chapter 2 on Indoor Air Quality Investigation
https://nam12.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.osha.gov%2Fdts%2Fosta%2Fotm%2Fotm_iii%2Fotm_iii_2.html&data=02%7C01%7C%7Ce3722dbd59d94e67102d08d81937634a%7C994c3e8bb42845fb8640593ef0303f7f%7C0%7C0%7C637287072968990386&sdata=DLAZ0JIXu%2Bpbn8PCKN2h2LHb%2Bs7NusoeWNWGEyG8vf8%3D&reserved=0

They actually got it from a 1987 NIOSH report, back in the good old days when "the outdoor, ambient concentration of C02 is usually 250-350 ppm." It was used a reasonable proxy for air exchange rates and noted that above 1000 ppm, increased complaints could be expected. It's not clear whether they complaints they have in mind include viral infections (the effects they note list "headaches, fatigue and eye and throat irritation are frequently found to be prevalent"). I remember those days when addressing IAQ concerns was as confusing and emotionally fraught as managing Covid issues is today.

Thanks for checking on this.

- Ralph


Ralph Stuart, CIH, CCHO
Environmental Safety Manager
Keene State College
603 358-2859

ralph.stuart**At_Symbol_Here**keene.edu

---
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



Electronic Transmission Confidentiality Notice
The information contained in this electronic transmission is private, confidential, the property of the sender, and intended for the use of the recipient(s), only. If you are not the addressee, any disclosure, copying, distribution or use of this information for any purpose is strictly prohibited. If you have received this information in error, please notify the sender, YBrinker**At_Symbol_Here**fele.com, immediately by e-mail and then delete this message. Thank you.
[FE.EN.1]


---
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.