Attached (thumbnail is black box, but assure you it is a trend) is the last 24hrs of dust counts at EX. These are correlated with the man lift in the area (Bartlett investigated yesterday), and I just chatted with Mark D.

Mark mentioned charging it a little this morning & then operating the man lift. It was in the VEA, so the dust counts this morning can be attributed mostly to the charging. (It is a known situation that when we charge batteries for this large equipment that a large plume of dust is generated.)

Right now EX is in the very early stages of preparing for opening BSC9, and this implies we are in the "dirty work" stage. This work needs to be done, but we should ramp down on needing the dirty battery-charging. Note: When Mark was moving the man lift around and during this work the dust counts were in the green/much cleaner.

The current state at EX is Mark is done with the Manlift and he has turned ON the BSC9 cleanroom.  There will be some craning work later today.

Another NOTE: Mark mentioned the prefilters on top of the BSC9 clean room fans (they are rectangular 1/4" thick mesh pieces) basically disintegrated in his hands when handling them (he threw all of them in the trash). So, I'm sure this also caused some dust clouds.