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Entry  Thu Jul 16 11:27:18 2020, aaron, Update, Lab Work, Reopening cryo lab 
    Reply  Fri Jul 17 13:15:03 2020, aaron, Update, Lab Work, Reopening cryo lab tape_before.pdfglasses.pdf
Message ID: 2537     Entry time: Fri Jul 17 13:15:03 2020     In reply to: 2535
Author: aaron 
Type: Update 
Category: Lab Work 
Subject: Reopening cryo lab 

TLDR: I sealed the leaks around the HEPA filter. I did an inventory of PPE and cleaning supplies in cryo, and separated two sets of personal PPE for Shruti and myself from the common supply. I did not receive PPE or cleaning supplies from Downs or 40m, but have inquired after both. Any anticipated work not explicitly mentioned here was not done; I tried to take care, but still strongly suggest that Shruti wipe down anything I placed in your personal supplies, just in case.

Next steps: See prior elog

 

After clearing the temperature check at home, still showing no symptoms, and starting the daily log in the reporting app, I head to West Bridge.

I entered the lab at 13:10 PT, using the N (olive walk) entrance to W Bridge. I am wearing a disposable mask, applied hand sanitizer on entering the lab, and don nitrile gloves. I locate the ISO and Kim wipes and wipe down

  • personal devices
  • glasses
  • keyboard, mouse, spirou workstation
  • door handles
  • Orange-brown lab chair
  • Common cabinet handles
  • label maker

Existing PPE and cleaning supplies in cryo

I located the following in the cryo lab, and am storing all PPE in the staging area at the entrance.

  • 4x laser glasses suitable for 1550nm. 2 are over-glasses, 2 are not, and I've labeled the glasses and storage cubby for myself and Shruti to have one of each.
  • 4x laser glasses for 1064. 2 are labeled '40m' and will be placed clean in the outbox for pickup with the circuit, the other 2 are also in labeled cubbies.
  • 1 pair of lN2 safety googles, 1 pair of ordinary sunglasses. These are not in regular use, and can be used occasionally with proper cleaning.
  • Limited supply of blue shoe covers (1 package)
  • 56 boxes of small dry Kim wipes, 4 box supply of large dry Kim wipes
  • 1 box of large nitrile gloves, nearly depleted
  • 2 Kimtech lens cleaning stations (34623; need to check whether this is just anti fog or also EPA approved sanitizing spray)
  • Various Tyvek coveralls (PN IC 182 BWH SM 00250C) size small to XL
  • 2 polyester lab coats (M, L)
  • Variety of Single-wrapped latex gloves, size 7, 8, 8.5, 9, 
  • hair nets
  • sleeve covers
  • 1 Willson face shield
  • disposable frocks size S 
  • limited supply of shop wipes
  • 1 package pre-wetted polyester wipes
  • dust catcher floor mats

Personal tools and PPE

Any tool I used that we have multiple copies of, I labeled "[aaron/shruti]" and set aside one copy for me and one for Shruti. My tools are on the blue cart holding Spirou. Shruti's are on the tan cart formerly holding screws and power supples (which I moved onto the remaining cart, the work bench, and the middle optics bench). Personal toolkit currently includes:

  • scissors
  • large flat head screwdriver
  • glasses cleaning station
  • dry kim wipes
  • small IPA spritz bottle 

Personal PPE are in clear bins labeled "Shruti" or "Aaron" and with the box contents. Currently each set includes

  • 2 disposable (but multi use) frocks
  • 2 disposable (but multi use) coveralls
  • 1 washable lab coat (where to launder?)
  • several pairs of AccuTech ultra-clean latex gloves
  • several hair nets
  • several blue shoe covers
  • several white sleeve covers

The remaining PPE are in clear boxes near the entrance labeled "common" and with the box contents. Extra AccuTech gloves and a few more coveralls are on the shelf below the HEPA filter.

Any tool with only one copy, I am noting here for a future order. I sanitized these tools before and after use. Common tools will remain in the tall blue Crafsman tool box.

  • label maker. The batteries were badly corroded (we usually run on power supply), I set them aside for disposal.
  • ladder

HEPA filter

The model of the HEPA filter is not visible from the exterior, and I will have to look up its cleaning schedule. The tape sealing the edges of the filter does not adhere to the textured paint surrounding part of the filter [attachment 1] . The smooth paint on the far wall appears to support adequate adhesion. To create a seal on the textured surface, I first cleared the supplies from the shelf under the filter and pealed back the non-adhering tape. I applied rubber cement to the sticky side of the tape, and held the tape in position for drying using the small boxes of Kim wipes from before. I applied rubber cement along the entire edge wherever there was textured paint, but not on the region with smooth paint. Air flow through the filter was noticeably increased following this procedure and seal was intact after a few hours, though I did not make a quantitative measurement. 

Stopped by Downs

at 1500 I exited the lab to use the restroom, eat, and pick up PPE from Downs 318. I swapped gloves on exit, and resanitized my hands after using the restroom in W Bridge basement, which is designated for our lab's use. After eating, I entered Downs and took the elevator to the 3rd floor, but was not able to access room 318 for PPE. I emailed Chub and Calum (listed contacts for Thomas lab) to coordinate a pickup at a later date. Specifically, I am requesting:

  • Nitrile gloves, M and S
  • 4 cloth face coverings, 2 for me and 2 for Shruti
  • Cleanroom masks (can also obtain from 40m PPE supply)
  • Beard covers (can also obtain from 40m PPE)
  • IPA wipes (some available in 40m supply)
  • disposable frocks size M (available at 40m)
  • 2x Disinfectant spray can
  • 2x hand sanitizer
  • 2x face shield
  • 2x no touch tools
  • 2x door adapter
  • 2x shop safety glasses
  • Signage
  • Borrow air flow meter if available 
  • anti-fog disinfecting wipes for glasses (is this the same as the Kimtech station?)

Misc

  • I found one function generator (SRS DS345) plugged into a power strip that was not connected to power. I've plugged it in to the wall and labelled it "check battery"

Exit

At 17:15, I begin wiping down the common tools and surfaces I used and exit at 17:25, upon which I disinfect hands again.

Attachment 1: tape_before.pdf  14.987 MB  Uploaded Sun Jul 19 13:45:00 2020  | Hide | Hide all
tape_before.pdf
Attachment 2: glasses.pdf  18.667 MB  Uploaded Sun Jul 19 13:45:24 2020  | Hide | Hide all
glasses.pdf
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