The entrance to the station has a large gathering of the Cloud in front of it so you will have to rush through. The door to the building is through the Cloud and to the left. Inside the building when you enter is a small room with two speakers (one shielded, the other not) and a large variety of scientific equipment as well as a few terminals. The basement has a large quantity of the Cloud but this can be fixed as the ventilation system is operational and can be activated to purge the Cloud.
If you are having trouble finding the speakers, look for graffiti on the walls ("tick tick tick") and an arrow pointing toward the speaker. Not all speakers are marked this way.
A Chinese Army: Special Ops Training Manual can be found in the eastern most room of the switching station. There is a huge machine on the south side of the room. The book is located on the catwalk that runs around the machine. It is the only portion of catwalk in this room that you have to jump to.
A Dean's Electronics can be found on the ground next to the corpse at the computer terminal that controls the speakers in the southernmost portion of the map. There is a tripwire trap just in front of the corpse.
An automatic rifle along with 48 armor piercing .308 rounds can be found leaning against the lockers in the utility room with the Ventilation Control System.