Mick and Zack went out and ran start-of-day checks and opened up BSC-7. Carolyn was recorder. (Mark L. and I had a telecon and joined the crew once we were finished.) Four drills were ready to go but two were non-starters in chamber. Drill "4 of 6" worked for 18 minutes (2 sections) before slowing down to the point where it was useless. Drill "5 of 6" was once again the workhorse: it cleaned 10 sections before the end of the day. The chamber is now 63.6% cleaned. One nozzle remains to be brushed prior to vacuum-wipe down-vacuum (V-WD-V), which should start tomorrow.

In preparation for V-WD-V, we moved the garbing-staging cleanroom so that the external purge air unit could be properly positioned in front of the door nozzle.