About This Archive  | DCHAS-L 2011 Index   | DCHAS-L Yearly Index
person wearing a disposable face shield and surgical style mask

Check out Safety Emporium for your N95, N99, and face shield needs.

Previous by Date:
Subject: Chemical Safety headlines from Google
Date: Wed, 26 Jan 2011 07:52:52 -0500
Author: Ralph Stuart 		Next by Date:
Subject: Re: Do surgical masks = 'respirators'?
Date: Wed, 26 Jan 2011 13:44:34 GMT
Author: "paracelcusbombastusvon**At_Symbol_Here**juno.com"


Date: Wed, 26 Jan 2011 08:30:04 EST
Reply-To: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: ACTSNYC**At_Symbol_Here**CS.COM
Subject: Re: Do surgical masks = 'respirators'?

Lynn has an excellent point.  Any substance with a TLV of 0.05mg/m3 or lower requires a hepa (N, R or P100) filter.  No N95s.  Same for asbestos, although the TLV is in fibers/cc.   And anything whatever that is expected to be present in the air over 5 times it's TLV can't be used with any of the masks.   Monona


In a message dated 1/25/2011 6:01:00 PM Eastern Standard Time, paracelcusbombastusvon**At_Symbol_Here**JUNO.COM writes:

As several have noted the "mask" must be NIOSH approved N95 with a "TC" number on the mask.  But, as Don noted, it still depends.  What is the material being milled?  If there is any potential the material could contain asbestos, glass fibers, ceramic fibers, or many other "hazardous materials" the mask must be a HEPA respirator.

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.