It's inside the building at ground floor.
It's in the shop-like building in the dark.
It's inside the main building in the corner looking south.
Storage 4, Ark Chest:
If you cross over here to the other side of the building and go up to the top room, there are Storage 4 and the Ark Chest.
Back at ground level, go to the garage around the back. There is a crawl space to get Storage 5.
It's up on the hill at the Zipline.