1) 'Remote scroll room' position: in original drawing this room is chosen on the first floor in the old 'electrical lab'.
This existing room is sufficiently close to the towers and there we have tested the envisaged solution by running a scroll pump
and looking at the envinronmental sensors (acoustic and seism of det lab ones in particular, Irene is in cc. we shall report about this test).
That room seems ok to us. Anyway we are also in favour of building another dedicated room outside, more or less where indicated by Loic,
for instance.

2) DET vacuum rack position: normal to install it out from the clean room.
The rack and its exact place is still to be discussed in Vac (Fabien in cc.  we shall need a solution to operate the minitower equipment by a person in the clean room, with a sort of 'clean' portable console?)


3) The accessibility of the pumps, flanges, vac equipment of DET tower (not the minitower but the present tower) could be limited by the 'new roof ' of DET lab.
This issue is still to be discussed, at first with Andrea 


4) It is needed to keep a passage vs the NI area at floor level. In some proposals the DET lab occupy all the space and close completely this passage.
Personnel need to reach that area during the construction phase and also during the operation phases, for instance during the
maintenance breaks. The passage should allow at least 1 people and 1 chariot (apart from safety considerations to be looked for, I don't know about).
The alternative of passing always from the platform and always using the bridge crane to bring parts is not practical and also very 'noisy'.
  Andrea hvae prepared some proposals about this.
This assuming to avoid this kind of transit across the det clean room

5) DC distribution
For vacuum racks it is envisaged to displace the DC power supplies to limit the EM noise level (tests done with Irene).
This installation need to be discussed also together other SS, maybe concerned by the same issue, and perhaps individuate a suitable position