Cheryl and I went into BSC9 to look at the particulate contamination in the viewports and at the drop-off by the gate valve. (Cheryl said that the contamination was the worst she has ever seen: my take is that this stuff looks very much like what we saw during the initial survey down the tube at BSC8.)We took some pix and a sample for analysis. Then, we removed OSEMs and preserved them clean. I came out: Scot and Ed went into the chamber with Cheryl. Mark D.and Bubba were also outside. The Lazy Susan, Slide Table and Lift Table were inserted. The SUS was removed, wrapped and set aside so that the optic can be put in a cake tin. The optics table was cleared and the telescope preserved clean. The VEA was cleared of SUS de-install tooling to make way for SEI stack extract tomorrow.