The spot is not exactly at the Dusty Depot, but it is the factory located a bit to the south of Dusty Depot. It's a great location for two reasons.
One is that it's not nearly as hot of a spot as Dusty Depot or Salty Springs, so you won't encounter too many players here. This means that you can safely gather your loot, and then you can go explore more dangerous territiories.
Second is that besides the guaranteed 3-4 loot chests inside the building, you will find tons of ammo and weapons spawning on the ground around it.