Per the plan, the O4 break was paused today at both LHO and LLO in order to execute a pre-planned list of repairs, maintenance, updates, measurements, and commissioning tasks.

The schedule is shown in the attached PDF and is an estimate based on work loads and task duration.

Today, many preparations were made which push towards venting the isolatable volumes:

Corner chambers

HAM7 chamber

Relay Tube between HAM5 and HAM7

HAM8 chamber

EX

We plan to do inchamber work in HAM6, 7, 3, and 8, and port work on a few different chambers, some at EX.