Date: Tue, 21 Sep 2010 09:42:50 -0400
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: Kim Auletta <kauletta**At_Symbol_Here**NOTES.CC.SUNYSB.EDU>
Subject: Re: Dental Schools and silica
In-Reply-To: <230294.a38a913.39ca0d6b**At_Symbol_Here**cs.com>


Monona - It was a lab bench system designed & installed abt 30 years ago. 
It collects the debris in an internal compartment. The compartment has to 
be emptied once in awhile (LOL). The system worked, but the staff were 
never given instruction or tools to clean it out properly. 

Kim Auletta
Lab Safety Specialist
EH&S    Z=6200
Stony Brook University
kauletta**At_Symbol_Here**notes.cc.sunysb.edu
631-632-3032
EH&S Web site: http://www.stonybrook.edu/ehs/lab/

Remember to wash your hands!


From:
ACTSNYC**At_Symbol_Here**CS.COM
To:
DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Date:
09/21/2010 09:39 AM
Subject:
Re: [DCHAS-L] Dental Schools and silica
Sent by:
DCHAS-L Discussion List 


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=6200
Stony Brook University
kauletta**At_Symbol_Here**notes.cc.sunysb.edu
631-632-3032
EH&S Web site: http://www.stonybrook.edu/ehs/lab/


Monona - It was a lab bench system designed & installed abt 30 years ago. It collects the debris in an internal compartment. The compartment has to be emptied once in awhile (LOL). The system worked, but the staff were never given instruction or tools to clean it out properly.

Kim Auletta
Lab Safety Specialist
EH&S    Z=6200
Stony Brook University
kauletta**At_Symbol_Here**notes.cc.sunysb.edu
631-632-3032
EH&S Web site:
http://www.stonybrook.edu/ehs/lab/

Remember to wash your hands!


From: ACTSNYC**At_Symbol_Here**CS.COM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Date: 09/21/2010 09:39 AM
Subject: Re: [DCHAS-L] Dental Schools and silica
Sent by: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>



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=6200
Stony Brook University
kauletta**At_Symbol_Here**notes.cc.sunysb.edu
631-632-3032
EH&S Web site:
http://www.stonybrook.edu/ehs/lab/


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