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Subject: Testing regular Laboratory Fume hoods ducts for perchlorates as a
Date: Wed, 28 Jan 2009 17:07:02 -0600
Author: Prabhat Goswami 		Next by Date:
Subject: Re: Eyewash / shower flushing frequency
Date: Thu, 29 Jan 2009 09:09:24 -0500
Author: ILPI


Date: Wed, 28 Jan 2009 20:17:53 -0500
Reply-To: Carl Zipfel <czipfel**At_Symbol_Here**COMCAST.NET>
Sender: DCHAS-L Discussion List <DCHAS-L**At_Symbol_Here**LIST.UVM.EDU>
From: Carl Zipfel <czipfel**At_Symbol_Here**COMCAST.NET>
Subject: Re: Eyewash / shower flushing frequency
In-Reply-To: <A2B4BFAE-4BB4-47CD-8785-E85C9F467A6A**At_Symbol_Here**uvm.edu>
The original question on this subject discussed costs associated with
testing.  An updated e-mail indicated that the $400/unit costs, which I
thought were excessive, included biological testing.  In that case I would
recommend the following:

Provided that:

a) All systems are essentially the same
b) All systems rely on the same water supply, and
c) There are no know, or recurring problems

Select an appropriate statistical sample, and on a weekly basis randomly
select the appropriate number of units to test.  Based on that sampling one
should be able to identify problematic units, and/or establish a more
precise sampling program.  This should drastically reduce the number of
units tested.  This should, also, establish an appropriate due diligence
program.

Carl Zipfel csp
EHS Management Systems LLC

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