[labnetwork] Question about cleanroom mask policies

[Tom Britton]

Hello Shimon,

Thank you for putting this together. It is most helpful in times of mask wearing and social distancing with respect to COVID both in and out of the cleanroom.

Two questions, if I can ask:

  1.  Did you start with a sample of measurements speaking without a mask from the same distances to see how much the mask helped against the baseline?
  2.  Since the virus ranges in size from 50 to 200 nanometers (0.05 to 0.2 micron), how do you think the numbers would fare under your test with particles of this size?

I wish all my UGIM friends and acquaintances a lovely and safe holiday season!

Tom

Tom Britton
Director of Sales
Critical Systems, Inc.
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From: labnetwork-bounces at mtl.mit.edu <labnetwork-bounces at mtl.mit.edu> On Behalf Of Shimon Eliav
Sent: Wednesday, December 16, 2020 1:07 AM
To: Robert Vandusen <RobertVandusen at cunet.carleton.ca>; labnetwork at mtl.mit.edu
Subject: Re: [labnetwork] Question about cleanroom mask policies

Hi Robert,

When we returned to work after the first lock-down, we asked ourselves what to do regarding masks/face covers.
Then I did a very simple experiment to check by myself how effective is a face-cover to contain the particles we generate during normal respiration or talking. See attached summary.

Today our policy is: every user comes with his/her own mask and must put the face cover over it. This "two layers" solution is more than enough inside the clean room (plus as much distancing is possible).

Regards,

Shimon
The Hebrew University of Jerusalem
The Unit for Nano Fabrication
Jerusalem - Israel

From: labnetwork-bounces at mtl.mit.edu<mailto:labnetwork-bounces at mtl.mit.edu> [mailto:labnetwork-bounces at mtl.mit.edu] On Behalf Of Robert Vandusen
Sent: Tuesday, 15 December 2020 19:29
To: labnetwork at mtl.mit.edu<mailto:labnetwork at mtl.mit.edu>
Subject: [labnetwork] Question about cleanroom mask policies

Hi all.
Hope this finds everyone safe.
Now that N95s are starting to become a bit more accessible, there has been some recent discussion within our labs about whether to adopt an N95 mask policy for new users and when distancing is a challenge.
So far we have just been wearing the standard cleanroom style masks.
Just wondering what other labs have been using.

Thanks
Robert Vandusen
Technical Officer, Microfabrication Lab
Electronics Department
Carleton University
room: 4184 Mackenzie Building
613-520-2600<tel:613-520-2600> ext 5761
Robert_vandusen at cunet.carleton.ca<mailto:Robert_vandusen at cunet.carleton.ca>

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