Date: Fri, 16 Dec 2011 17:21:59 -0500
Reply-To: DCHAS-L <DCHAS-L**At_Symbol_Here**MED.CORNELL.EDU>
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From: Don Abramowitz <dabramow**At_Symbol_Here**BRYNMAWR.EDU>
Subject: Re: Perchloric Acid Hood Duct Design Criteria
In-Reply-To: <1ed02.7b1a3c99.3c1b19de**At_Symbol_Here**>

Donald Abramowitz
Environmental Health & Safety Officer
Bryn Mawr College
Bryn Mawr, PA

My understanding is the it should not be less than 70 degrees and pref.erably vertical 
James A. Kaufman, Ph.D.
Chair, ICASE Committee on Safety in Science Education
International Council for Associations of Science


The Laboratory Safety Institute (LSI)

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In a message dated 12/14/2011 3:36:53 P.M. Eastern Standard Time, ldmclouth**At_Symbol_Here**LBL.GOV writes:
Hi All -

Is anyone aware of a prohibition against using 45 degree angle ductwork
runs (as opposed to vertical runs) for a perchloric acid fume hood? 
This pertains to water washdown systems.  This question was posed to me
and I thought I'd seek your collective wisdom.
aware of regarding this subject.



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