the plans show much of what you were expecting on the ground floor, given Knive's recon info from earlier in the day.
-There is a side entrance for the underground car park for staff. This runs to 3 basement levels, accessible via a central lift and two sets of stairs.
Both sets of stairs and the lift exit into the main lobby on the ground floor. The elevators + doors to the stairs are controlled by access card.
-There is an emergency air extraction system listed in the diagram for the underground car park. it looks like one main branch of it runs up to the roof level, but there isn't much detail about what this system is comprised of.
-The main lobby has two main revolving doors for access, MAD scanners installed directly in front. two elevators run either side of the reception desk to access upper levels. a fire exit stairway is also available from the left side of the lobby (you suspect this will be alarmed for emergencies). Cameras cover the lobby, lifts and the mezzanine area outside the lift on each floor, as well as the rear and frontal access.
-Ground floor is the staff canteen and miscellaneous meeting rooms for guests, accessible from the two doors in the main lobby. Swipe card access doors control access down these corridors to the service, delivery and maintenance area facing the back gate. A small security office is stationed by the back doors.
-Level two is labelled as administrative offices, its diagram showing a maze of cubicles, presentation rooms and offices.
-Level three is labelled as the ops centre, the diagram showing a large auditorium style setup similar to the sub-orbital control centres you've seen in the trids. Huge screens dominate the main room, and various offices litter the space behind this.
-Level four (top floor) is labelled as the server room. Biometric and Swipe card access controls present at main doors. Worryingly, a drone storage room can be seen on the diagram, off to the left of the main access door. a rail patrolling the server room perimeter is labelled on the diagram.
Roof access is available from this floor, lift can be overridden with security swipe card. The roof also features a small plant room, you assume this is where the emergency power backup systems and lift control systems will be located.