The "crew" could have been using a generator. The equipment shown in the mini-video on the green oasis environmental website ( http://greenoasisenvironmental.com/operations ) or rather, the audio sounds as though there could be a generator being used to power the demonstration equipment. It sounds like it, to me.
Good find, Wookie.
Here's what I know for certain.: GRNO has no active facilities. The mobile processor is not functional.