We started staging for the clean room work, moving parts from the high bay to the H2 acoustic enclosure. The airshower was craned over the beam tube as well, after being vacuumed and wiped down.
The seams between the chiller room/diode room and the LVEA wall were filled with backer rod and caulked. Dust counts for the last 3 days are attached, levels are good.
ALSO: Two mice were found hiding under a rag in the LVEA. It's not clear where they came from, but I suspect they came from one of the two return air registers which were left uncovered. I put a trash bag over each one, but I don't know if that's enough. Make sure to check your equipment before you move it if you have anything stored in the North bay!