snf operations, post-shelter-in-place...at peak times, 15-20/hr may enter the gowning room and ~½...

April 28, 2020

W h a t w i l l b e t h e “ N e w N o r m a l ” ?

SNF Operations, Post-Shelter-in-Place

Purpose of this meeting….

2

• Update everyone on what we know

• Share our thinking so far

• Invite you to help

Group effort

3

MarcinSwaroopEli CahanKelly McFarlane

CarsenGaryElmerMarioJimUli

MauriceUshaMichelleXiaoqingGrahamSaeedPhil

4

What do we know?1. Reopening dates for research will be determined by:

• The State• Santa Clara County• The University• Dean of Research

2. Conditions for reopening:• A comprehensive return-to-work safety plan• Ramped startup: ~25% of normal• Priority to COVID-19 work

3. Lab operations:• Will be very different• Will evolve as Public Health needs evolve• Not likely to be “normal” for years, if ever again

4

What do we know? Virus spreads by:

1. Physical contact with surfaces. • Well-understood.• Well-defined precautions can be used.

2. Respiratory contact by aerosols & droplets• Not well-understood.• Precautions are evolving.

5

https://wwwnc.cdc.gov/eid/article/26/7/20-0764_article

6

What are the rules? We need to control:

1. Physical contact with surfaces. • Frequent disinfection of common or

shared surfaces.• Dedicated/personal lab wear (gloves,

gowns/labcoats, safety glasses)

2. Respiratory contact through aerosols & droplets• Use of masks.• Use of social distancing,

understanding this is evolving. From the nano@Stanford YouTube channel on how to make your own cleanroom-compatible mask: https://youtu.be/D9rgsRrc-54

Pandemic social rules

7

These apply, whether we are a cleanroom or grocery store

6’ Rule: The 6’ rule governs all aspects of lab use and operations, including aisles and corridors.

Limiting contacts: The number of people who may routinely cross paths with each other

Traceability: Accounting for all contacts, if needed

Health checks: Monitoring our health for the sake of others

https://xkcd.com/2286/

8

Our Key to success

Us. All of us.

Our ability to re-open, stay open, and stay healthy –depends on everyone one of us complying with rules.

Our Approach:

• Accept that this an evolving, dynamic “New Normal”• Co-create a New Normal with our lab community• Make it easy for everyone to feel safe• Be data-driven – and do what makes sense• Consult often with our peers and experts, at Stanford and beyond

9

Our Goal

Maintain a healthy work environment through managing:

Physical contact- Routine environmental cleaning & disinfection- Individual responsibility for personal labwear and hygiene

Respiratory contact- Distancing in space (6’ social distancing)- Distancing by time (work shifts)

To be achieved by some engineering controls and a everyone’s compliance

10

Controlling Physical Contact: Cleaning & Disinfection1. Regular wipedowns in public areas 2. Regular wipedowns of shared lab surfaces (door handles, work surfaces)3. Routine disinfections of shared keyboards4. Provide hand sanitizer and disinfectant/wipes throughout the facilities

11

Controlling Physical Contact: Personal Lab Wear

1. All labs: a. Facemasks will be required.b. Sanitizer & Wipes – for wiping down personal

items.

2. In the cleanroom:a. Assigned bunnysuit, stored in a plastic bags on

labeled hooks.b. Personal safety glasses, can be stored with

bunnysuits.

3. In ExFab and MOCVD Labs:a. Assigned labcoat, stored in a plastic bag on

labeled hooks.b. Personal safety glasses, can be stored with

labcoats.

12

From the nano@Stanford YouTube channel on how to make your own cleanroom-compatible mask: https://youtu.be/D9rgsRrc-54

Controlling Respiratory Contact: Social Distancing

13

How does social distancing work in shared labs?

Our Challenge:

We provide shared resources to over 600 researchers.* Our labmembers represent 94 faculty just from Stanford & SLAC, plus 135 companies and other academic institutions and government labs. Any month will see 250 labmembers. At peak times, there may be up to 50 people interacting in SNF spaces.

*FY19 data

14

Lab #Users

Cleanroom 159

ExFab 153

MOCVD 5

Total Unique Users 223

#Individuals enabling charged equipment on Badger, from March 1-16, 2020. Excludes staff.

Our success (our large lab community) is our vulnerability (in a pandemic world).

Our challenge is to continue serving our labmembers, safely.

Minimize physical presence of staff

Staff who can will continue to work from home as much as possible, working on training materials and other projects, on-call and available to zoom for meetings and consultations.

• No new labmembers, for the near term, as we develop new training materials and methods.

• Equipment training will be case-by-base, depending on whether it can be done remotely or from 6’.

• Telepresence: Starting with a poor person’s telepresence (Zoom) station.• Community input: Office hours? More Process clinics? Everyone’s input on

how we can maintain community in a socially distant world is needed.

15

16

Allen BuildingFirst Floor

Grid=12’ X 12‘

Analyze Our Spaces

How our spaces are used

Allen BuildingFirst Floor

Grid=12’ X 12‘

Air changes are indicated in whilte

SNF office spaces

SNF lab spaces(excl. MOCVD)

Lab Entries

Ensure users of tools have 6’

18

Identify locations where tool users of adjacent stations would come within 6’.

Address by:- Moving tools- Moving users (rotating the

user station)- Creating a scheduling policy

Does not address traffic, just tool use.

19

Lab traffic

In the Cleanroom, aisles are 4’ wide or less; exit corridors are 6’ wide.

People cannot pass in aisles or corridors, but need to “tuck in” or “pull out” to allow passing traffic.

This is one key constraint to limiting how many people can be safely accommodated in the lab.

Normal occupancy in the Cleanroom

This plot shows the times of first enable to last disable by individuals. (Non-charged tool use, staff and student helpers are not included.)

Two observations:1. Typical peak occupancy ~20 labmembers2. Most activity is between 10-4 pm (33 of 47

labmembers, accounting for 95% of tool use.)

Labmembers in the cleanroom, 3/5/20

24 hr clock

The Cleanroom accounts for ~70% in both usage hours and users for all of SNF.

Indi

vidu

al L

abm

embe

rs

Traffic analysis: Heat map of cleanroom trafficBadger logs are indicated in each space: Max/hr, Mean/hr. Heat map is based on Badger activity, confirmed with inspection of camera video. From this, comparison between peak numbers and the number of frequently used tools in each area can be made. Green: Peak number are lower. Yellow: Peak numbers are at/occasionally higher. Red: Peak numbers are much higher.

Observations:- Gowning room is the choke point.Litho traffic can be attributed to use of preferred microscopes, Chromeboxes, preferred entry door, chemical transport.- Etch aisle traffic is attribute to preferred path to the far side of the lab, chemical transport.

22

Plot shows average # of entries to the gowning room, by hour and day of the week, as tracked by keycard logs. This does not account for exits or any “tailgating”.

The number of people entering the gowning room is higher than the number with active Badger sessions; expected when someone starts a tool, leaves, and then returns.

At peak times, 15-20/hr may enter the gowning room and ~½ as many leave. Thus, peak occupancy is ~25-30/hr or 5-6 people every 5 minutes. To maintain 6’ distance in 200 ft2 of space, occupancy will likely be limited to 1 or 2.

Hour (24 hr clock)

Ave

# En

trie

s

Lunch time dip

Keycard Door Logs: Gowning room

Gowning room is the tightest pinch point –plans are to create a second gowning space.

Hour (24 hr clock)

Ave

# En

trie

sHow can we flatten this curve?

Lunch time dipSeveral of our peers are using or plan to move to lab shifts:

- Fixed shifts limits the number of contacts.

- Properly designed, shifts can distribute lab load throughout the day and week, to reduce traffic and waiting.

Check for seasonal difference in lab activity

Average no of Badger enables/hr by day of the week, in Feb 2020 (left) and July 2019 (right). Lab activity in the summer is typically higher than during the school year. This data indicates the pattern of usage is the same, but with less variability.

Usage patterns (time of day, weekday versus weekend) are consistent.

• Pareto analysis of lab time (first login to last logout for an individual session).

• X axis is span in hours

• This is the type of analysis we need to get our hands around the different requirements in our lab community.

Considerations in the shift approach: Current patterns of use

Lab use in a session

Ave

# of

Lab

mem

bers

% of users for Pareto Plot

What next?

26

We are just getting a handle on what is needed for a return-to-operations.This is your lab; your input is needed. We will post information and invite your feedback and discussion.

Some ideas:

1. A new web page for discussions in the lab community.2. A survey, for expressing opinions and preferences, offering suggestions.

We want to know your concerns.

Finally….

27

Thank you and stay healthy.