From: "Wilhelm, Monique" <mwilhelm**At_Symbol_Here**UMFLINT.EDU>
Subject: Re: [DCHAS-L] ? Re Eyewash Water Temp Spikes?
Date: Fri, 21 Apr 2017 02:18:52 +0000
Reply-To: ACS Division of Chemical Health and Safety <DCHAS-L**At_Symbol_Here**PRINCETON.EDU>
Message-ID: 1109037139E1524980CF9CBEB2476618010AEB7A19**At_Symbol_Here**
In-Reply-To <54BFCEF5-2A03-4629-8423-A5CAFCCEBCFA**At_Symbol_Here**>

Hi Rob,


Thank you for your response.  Our trades people are union.  So, I am not supposed to try to troubleshoot or resolve on my own.


There are 3 theories currently being investigated by our plumbers and EHS people (the mixing valves themselves, NOT having recirculated hot water, and inconsistent water pressure throughout the building).  I just wasn't sure if I had to tag them out until it is resolved, which could be a very long time for a couple of these possibilities.





From: ILPI Support [mailto:info**At_Symbol_Here**]
Sent: Thursday, April 20, 2017 5:08 PM
To: ACS Division of Chemical Health and Safety
Cc: Wilhelm, Monique
Subject: Re: [DCHAS-L] ? Re Eyewash Water Temp Spikes?


Need to know more about the system to diagnose it.  So first off, is this an eyewash or safety station? Is it served directly by a tempering unit (thermostatic mixing valve) or does one feed several eyewashes?  What size inlet lines are supplying the water and is there any sort of recirculating loop in the install?  Do we know the temperature of the incoming water - can test that by getting temp of cold and hot water in the lab faucets, I suppose.


This may require pictures. You can't post pictures to the list, but you can upload them somewhere and then reference them by URL.  If you can't do that, send pictures off-list and I can post them for you.


Rob Toreki



Safety Emporium - Lab & Safety Supplies featuring brand names

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On Apr 20, 2017, at 4:27 PM, Wilhelm, Monique <mwilhelm**At_Symbol_Here**UMFLINT.EDU> wrote:


On the topic of eyewashes, and knowing that Ellen and others were recently working on ANSI Z358.1 2016:


Does anyone have any specs on temp ranges other than the ANSI 60-100*F range?  Is it acceptable to JUMP (temp change occurs within seconds) between 60 & 100 4 times over 2 minutes?  Or, does anyone read the appendix B6 statement about the temps being conducive to a 15 minute flush period along with the amount of discomfort this type of sudden change would give to indicate that this is not acceptable?  Are you required to tag a unit out of service if it goes out of this range or is it ok to just take the average temp of the water over the test period?  If unacceptable, what range would be more acceptable and over what period? 


When you are watching one thing and discover a new thingÉ.gotta love science!  We have WAY too many eyewashes in our labs and the more of something you add, the more likely you are to find a problem.


Monique Wilhelm

Laboratory Manager

Department of Chemistry & Biochemistry

University of Michigan - Flint



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