[Sbs_gems] [EXTERNAL] Re: EEL Closure for the Following Two Weekends

[Bob Sperlazza]

Brad,

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.

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

Bob

________________________________
From: Brad Sawatzky <brads at jlab.org>
Sent: Wednesday, November 3, 2021 11:09 AM
To: Walt Akers <akers at jlab.org>
Cc: Bob Sperlazza <sperlazz at jlab.org>; sbs_gems at jlab.org <sbs_gems at jlab.org>
Subject: [EXTERNAL] Re: EEL Closure for the Following Two Weekends

Hi Walt,

Will the temp/humidity be monitored?  (How aggressive will the venting be?)

For example, it got down to 40F last night -- not freezing, but
certainly a larger temperature swing than I would prefer to expose
our detectors to in EEL/125.

How will the grinding dust be controlled?  I don't want it escaping
EEL/124 and plating out on the GEM layers in EEL/125 (for example).

-- Brad

On Wed, 03 Nov 2021, Walt Akers wrote:

> Good Morning:
>
> During the next two weekends, Facilities will be grinding and refinishing
> the floor in the EEL cleanroom.  Because of the chemicals being used,
> the workers will be wearing full-face respirators and the building will be
> closed to staff and users.
>
> The closure will be from 6:00 PM on November 5th to 6:00 AM on
> November 8th, and from 6:00 PM on November 12th to 6:00 AM on
> November 15th.
>
> During that time there will be NO ACCESS to the building.
>
> If there is a physical emergency that requires access to the building,
> please contact the guards at 269-5822.
>
> If there is a technical emergency that requires access to the building
> (i.e., critical systems are offline, beam operations are halted and you
> have to access the EEL to resolve the issue) contact Walt Akers at
> 757/846-4810 or Bob Sperlazza at 757/310-4390.
>
> Note:  The materials that are being used are standard two-part
> epoxies and Industrial Hygiene is exercising an abundance of caution.
> The building will be continuously vented and there should be no
> impact to sensitive equipment. Having said that, the building
> temperature is likely to vary in the Target Group high bay --- so
> temperature sensitive equipment should be safeguarded.
>
> If you have questions...  send me an email.
>
> As always, thanks for your patience.
>
> Walt
>

--
Brad Sawatzky (he/him), PhD <brads at jlab.org> -<>- Jefferson Lab/ Hall C/C111
Ph: 757-269-5947  -<>-  Fax: 757-269-5235  -<>- Pager: brads-page at jlab.org
The most exciting phrase to hear in science, the one that heralds new
  discoveries, is not "Eureka!" but "That's funny..."   -- Isaac Asimov
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