Date: Thu, 29 Jan 2009 10:14:24 -0500
Reply-To: "Prisby, Mary" <Mary.Prisby**At_Symbol_Here**GRACE.COM>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: "Prisby, Mary" <Mary.Prisby**At_Symbol_Here**GRACE.COM>
Subject: Re: Testing regular Laboratory Fume hoods ducts for perchlorates
as a standard practice before dismantling
Comments: To: Prabhat Goswami
In-Reply-To: A<!&!AAAAAAAAAAAYAAAAAAAAAHdpLpDu6QlDqmhjH3tl40vCgAAAEAAAAL5uwB/jo8FFqwnUxpZr4YoBAAAAAA==**At_Symbol_Here**>

Thanks for the question. I will also be involved in dismantling a fume hood that used HF.  What should I be concerned with?
Mary Prisby
Environmental, Health, and Safety Manager
GRACE Davison
4099 West 71st Street
Chicago, IL  60629

From: DCHAS-L Discussion List [mailto:DCHAS-L**At_Symbol_Here**] On Behalf Of Prabhat Goswami
Sent: Wednesday, January 28, 2009 5:07 PM
To: DCHAS-L**At_Symbol_Here**LIST.UVM.EDU
Subject: [DCHAS-L] Testing regular Laboratory Fume hoods ducts for perchlorates as a standard practice before dismantling

Dear CHAS Members,

I’m looking for some advice and information.  Before dismantling for disposal, do you have a standard practice of testing regular Laboratory Chemical Fume hoods ducts for the presence of perchlorates?   (I’m not talking about Perchloric Acid Fume hood here). The question arises because for many hoods, the history of usage is not known and in the past unknowingly users may have used such fume hoods for heating perchloric acid in ashing procedures.  We have a number of old fume hoods dismantled and replaced by new ones, so far without any problems.  I would very much appreciate your advice.


Prabhat Goswami  

Prabhat C. Goswami, Ph.D.

Biological and Chemical Safety Coordinator

Environmental Health and Safety Office

191 Frank Kennedy Centre

University of Manitoba

Winnipeg, Manitoba R3T 2N2


Tel: (204) 474-8791

FAX: (204) 474-7629


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