The central room contains 2 Medical Kits, 2 Ammo Boxes (one with an "easy" lock, 2 Metal Boxes, a Toolbox, 3 loose Railway Spikes, 2 Fission Batteries, 2 Leather Belts, a Paint Gun, and a Lunchbox
In the middle of the eastern-most tunnel, next to a skeleton, there is an Ammo Box and a loose Assault Rifle and Stimpak.
On the south side of the eastern-most tunnel there is a storage room with an "average" lock. It contains a lot of loot -- 3 Medical Kits, a Toolbox, a Grenade Box, an Ammo Box, and 2 Metal Boxes, as well as 2 loose wonderglues.
In the room that's in the farthest northeast corner of the map (Room with door to Warrington Station), there's a shelf with 2 Medical Kits. Shelf also contains 5 Sensor Module (Used in Schematics - Bottlecap Mine) and 2 Conductors. Around the corner there's a Desk with 3 loose Conductors and a Stimpak on top of it.