There is a storage place in Chantilly. Its on the westbound side of 50 and it literally sits on the Fairfax/Loudoun County line right next to Moore Cadillac/Hummer. The facility is maybe a few years old, gated, multi-story with a big industrial grade elevator that you access from the inside via keycode.

My work kept a bunch of stuff in there for well over a year, including some pieces of technology, and it never leaked. They no longer use the place and have since cancelled the lease on the place and disposed of the technology because it became outdated.