Fallout: New Vegas locations project
Wastewater treatment plant
The wastewater treatment plant is directly east of Ulysses' Temple - after detonating the warhead near the water pipe, go on the top of the ruined building (the one lying on the side) and turn around - you'll see a rocky path, which leads to the wastewater treatment plant.
Inside, past some Tunnelers fighting a marked man, you'll find a room with two guards, a manager's terminal with an entry for the Nostalgia challenge, and a Ralphie poster for the Feel Like A Kid Again challenge.
- Pugilism Illustrated, behind the lockers.
- Also to the North/Northeast of the entrance to the treatment plant down a ledge are two NCR Ranger action reports. One of the reports is also labeled 'Addendum'. Both of the reports are part of the Nostalgia challenge added in the add-on.