See my notes attached if you wish.

The Support Table was level to within 0.3mm.  I am using a different reference although they are tied together but the elevation it self is ~1mm higher than the elevation from 1 October.  Still, I think most will say this can be ignored.  So, we did not do any Support Table leveling with HEPI.

Moved up to look at the Optical Table, out of level about the same as yesterday, reasonable.  Removed 5kg of 'extra mass', that is, part of the mass I added to account for the to-be-installed components back in October.  There still remains some 14 kg of extra mass, to-be-removed later when more components are installed onto the Optical Table.  We shifted this mass around to level the table and got the level to +-0.1mm at -185.7mm local or -199.8 global, about ~0.5mm higher than in October and within 0.2mm of spec -200mm per D0901821.

The Extra Mass is not bolted down.  It consists of one 10kg D0901075 with 2 stacks adjacent each consisting of one D080001 & four D080002 masses.  The Extra Mass is located close to the East side of the Optical Table just South of mid-way.