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

[Walt Akers]

Hey Brad:

I'm not aware of any supplemental temperature or humidity
monitoring that will be performed.

The roll-up door will be open in the Target Group High Bay during the
day, but will be closed at night.  A 600 CFM fan with an exhaust conduit
will be installed in the cleanroom while the work is being performed
and will duct it's exhaust to the outside air.  The air filters in the clean
room will be turned off during this work.

I do believe some temperature swings are possible and there may be
some dust, but nothing massive.  If your units are not powered on, you
may want to place a dust cover over them out of caution.

I'll allow Bob to respond if he has any additional feedback.

Walt

Brad Sawatzky wrote:
> 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
>>