Yesterday, Mark L. and Chris spent some serious time in chamber doing the final clean-up inside BSC8 so that the door could go back on ASAP. The interior of the ACB was wiped down with a dry wipe to collect the glass dust at the lips so that it could be easily vacuumed up. During this process, one additional free range washer was found on the lower shelf. The two central planks of the BSC flooring were removed from the chamber and set aside in the staging cleanroom. The remaining planks on the east side of the chamber were stacked on top of the west side flooring so that the chamber floor could be inspected, vacuumed, and wiped down. There was very little visible debris on the east side of the chamber floor or rim. Next, the east side flooring was wiped down and re-installed so that the planks from the west side could be stacked up. The west side of the chamber floor was inspected, vacuumed, and wiped down. As expected, the west side of the chamber floor and the rim had numerous glass shards as well as dust (likely from glass). After wipe down, the west side flooring was returned to its starting position. Flooring hardware was installed around the perimeter. The central planks were wiped down and returned to position along with the accompanying hardware. The GV1 nozzle, the nozzle to GV3 and the Y-beam manifold as far as the first joint were vacuumed and wiped down.C-3 covers were removed from both structures (Quad Upper Structure and FM)so that they could be inspected. Thomas came in to swing the ACB back into its usual position. Some particulate, most likely glass, was found on the metal masses of the FM and carefully vacuumed off.

Today, Mark and Chris completed the work in BSC8. A clean step-stool was placed into the chamber so that the upper parts of both structures could be given a close inspection: nothing distressing was found there. However, inspection of the support tube bellows revealed glass shards in the C-4 bellows.The shards were vacuumed up. Five witness plates were placed:
1. Bottom of GV1 nozzle close to septum;
2. Bottom of bellows convolutions in GV3 nozzle;
3. Bottom of bellows convolutions in Y-beam manifold;
4. BSC flooring/ACB face as landmark (approximately parallel with quad optic face);and
5. Center of BSC flooring (approximately center of space between the quad and FM, which seems to be a "dirty" spot).
O-ring protection was removed. Then, o-rings were partially removed (lower half)and closely inspected for any glass debris. The o-rings looked good so they were wiped down and re-installed. The chamber door was vacuumed, wiped down, and then, re-installed. This concludes the physical clean-up of the fiber break at BSC8.