The dome and east door of the BSC 3 chamber was removed and walking plates were placed on the work platform. These have not been installed because we have not located the C channel pieces that bolt to the walking plates so the C 3 cover can be secured to the walking plates. We also installed the permanent flooring in BSC 3 chamber. We installed the soft roof that was on the BSC 3 clean room onto the clean room over the cryo pump spool. The SEI soft roof "sock" is on the clean room over BSC 3.