Date: Tue, 21 Sep 2010 09:30:19 EDT
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: Dental Schools and silica

That says the wrong engineer installed or designed the system.  If the ducts were round with no right angle bends, and were sized for a 4000 l/m centerline velocity as ACGIH recommends, there would be no deposition. A lot of these desk-sized systems available off-the-shelf are not even close to good design.   Monona

In a message dated 9/21/2010 9:19:27 AM Eastern Daylight Time, kauletta**At_Symbol_Here**NOTES.CC.SUNYSB.EDU writes:

The biggest problem I had with silica control in our dental school was cleaning out the local ventilation system. I had them get the small HEPA vacuum (the real kind) and that made a big improvement.

Kim Auletta
Lab Safety Specialist
EH&S    Z=3D6200
Stony Brook University
EH&S Web site:

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