A few nights ago at about 9:45 p.m in the Lynnhaven area there was a truck with a hose attached to its back which seemed to be spraying some kind of fog at the houses as it drove by at about 6 m.p.h.

It was a rather noisy contraption and was wondering what it is? I thought it was a street sweeper before I saw it. This was just when I heard going on another street in Lynnhaven.