Scrying would be a ritual of fourth level.  We could just ask Sam's pantheon a quick yes or no question instead.  When we get there she can cast Augury, "Will seeking out the Lab Destruction Lever be a good idea for the safety of the city?"  (Asking if OUR going into the Lab is certain to bring a Weal/Woe, or just a Woe, answer, as it can't be healthy for US... but asking if we'll help the city?  That should work.)