The two small ponds that comprise the site are highly irradiated, but the lake behind the camp contains normal radiation levels. The barrels that are not in the water, including the ones on the trailer truck between the two ponds, do not emit radiation, however. Various ammo and other containers are found in the two connected crude wooden structures and under the nearby blue tarp.
- Super mutant wrist wraps - At the base of the wooden tree tower, next to the ammo box and near the steamer trunk.
- Mini nuke - In the large tire next to the megaloader.
- Hypothesis: To aid in one of his experiments, Doctor Holdren of the Institute's BioScience division asks the Sole Survivor to obtain a tissue sample from a particularly tough super mutant and return it to him.
The Mass Fusion disposal site appears only in Fallout 4.
- Fallout 4 Vault Dweller's Survival Guide Collector's Edition p. 355: "[5.06] MASS FUSION DISPOSAL SITE
This was the property of Mass Fusion and used as a disposal site for coolants and other liquids. As much of the poisons were buried at this site, pressure has built up and the irradiated pools around the shores of the lake have bubbling gasses. Be wise: Wear radioactive protective gear at all times. Be perceptive: Locate the steamer trunk in the treehouse to the northeast. Be extra perceptive: There’s a Mini Nuke inside the large tire by the yellow digging machine."
(Fallout 4 Vault Dweller's Survival Guide)