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Brad,</div>
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The building will still be conditioned. Mike Sprouse can provide the details. He will allow additional fresh air into the building to allow for proper ventilation thru the weekend.</div>
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As for controlling dust. The roll up doors in the room are closed and the subcontractor is using a grinding machine with a self contained vaccum system</div>
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Bob</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> Brad Sawatzky <brads@jlab.org><br>
<b>Sent:</b> Wednesday, November 3, 2021 11:09 AM<br>
<b>To:</b> Walt Akers <akers@jlab.org><br>
<b>Cc:</b> Bob Sperlazza <sperlazz@jlab.org>; sbs_gems@jlab.org <sbs_gems@jlab.org><br>
<b>Subject:</b> [EXTERNAL] Re: EEL Closure for the Following Two Weekends</font>
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<div class="PlainText">Hi Walt,<br>
<br>
Will the temp/humidity be monitored? (How aggressive will the venting be?)<br>
<br>
For example, it got down to 40F last night -- not freezing, but<br>
certainly a larger temperature swing than I would prefer to expose<br>
our detectors to in EEL/125.<br>
<br>
How will the grinding dust be controlled? I don't want it escaping<br>
EEL/124 and plating out on the GEM layers in EEL/125 (for example).<br>
<br>
-- Brad<br>
<br>
On Wed, 03 Nov 2021, Walt Akers wrote:<br>
<br>
> Good Morning:<br>
> <br>
> During the next two weekends, Facilities will be grinding and refinishing<br>
> the floor in the EEL cleanroom. Because of the chemicals being used,<br>
> the workers will be wearing full-face respirators and the building will be<br>
> closed to staff and users.<br>
> <br>
> The closure will be from 6:00 PM on November 5th to 6:00 AM on<br>
> November 8th, and from 6:00 PM on November 12th to 6:00 AM on<br>
> November 15th.<br>
> <br>
> During that time there will be NO ACCESS to the building.<br>
> <br>
> If there is a physical emergency that requires access to the building,<br>
> please contact the guards at 269-5822.<br>
> <br>
> If there is a technical emergency that requires access to the building<br>
> (i.e., critical systems are offline, beam operations are halted and you<br>
> have to access the EEL to resolve the issue) contact Walt Akers at<br>
> 757/846-4810 or Bob Sperlazza at 757/310-4390.<br>
> <br>
> Note: The materials that are being used are standard two-part<br>
> epoxies and Industrial Hygiene is exercising an abundance of caution.<br>
> The building will be continuously vented and there should be no<br>
> impact to sensitive equipment. Having said that, the building<br>
> temperature is likely to vary in the Target Group high bay --- so<br>
> temperature sensitive equipment should be safeguarded.<br>
> <br>
> If you have questions... send me an email.<br>
> <br>
> As always, thanks for your patience.<br>
> <br>
> Walt<br>
> <br>
<br>
-- <br>
Brad Sawatzky (he/him), PhD <brads@jlab.org> -<>- Jefferson Lab/ Hall C/C111<br>
Ph: 757-269-5947 -<>- Fax: 757-269-5235 -<>- Pager: brads-page@jlab.org<br>
The most exciting phrase to hear in science, the one that heralds new<br>
discoveries, is not "Eureka!" but "That's funny..." -- Isaac Asimov<br>
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