Hi  I have a bit of a particular project here, let me explain.
We want to certify 5 office buildings under LEED v4 EBOM. After research we have thought that a Group Approach should work in our situation.
We are confident that 4 out of the 5 buildings will be eligible for certification. The fifth building is the main one, and it is a bit particular. It has 8 floors, where 6 of them are residential and 2 of them are office. Those 2 are the ground and first floors, and the later occupies the space of two floors as it has a mezzanine. The office space is what we want to certify. Also, the residential and the offices are completely separated; to access them there are different entrances and they are not connected through the inside by any stairs or lift.

Also, all of these 5 buildings are located close to each other but they are in public space (at the city centre of a metropolis). There is a river RIGHT by one of the buildings and a canal in between 2 and the other 3 buildings. So employees constantly walk over a bit of the canal/river to move from one building to another. By the way, there is no other green/natural space besides the river.

Now, my questions are:
1. Is that "particular" building still eligible for certification?
2. Should we include any public space inside the project boundary? If so, how do we allocate it to the buildings?
3. And, do we include the river/canal inside the boundary, if so, for which of the buildings?
Please, note that my questions are for buildings going for a Group Approach certification, i.e.: individually certified.

Many Thanks.