Mark Layne and I went down to Y end to vacuum the manifold between the spool opening and BSC10 (~10 ft). The manifold section showed very little dust accumulation between the time of chamber cleaning and now. There were a few (5-6) whitish flakes close to the spool opening but other than that there was very little for Mark to vacuum up. There is BSC flooring in BSC10 and the flooring hardware is in place.

We left the cleanroom vacuum in place so that the PCal and CPB teams can use it for "Clean as You Go" work during assembly and installation.