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Subject: Re: Peroxide Question
Date: Tue, 21 Sep 2010 09:25:54 EDT
Author: ACTSNYC**At_Symbol_Here**CS.COM
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Subject: Re: Peroxide Question
Date: Tue, 21 Sep 2010 10:07:41 -0400
Author: "Bell,Martin"
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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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