"Off the charts" means anything that gives you more radioactivity than a couple days in the sun.

Almost all radioactive stuff our University deals with is so minimally radioactive you literally get more exposure from walking from your house to your car on an overcast day - yet it is incredibly highly regulated and followed from the moment it hits the campus.

Of course, barrels of crap under an old nuke facility are going to give off a hell of a lot more radiation than a radiolabled isotope measured in uci's but until we hear what is behind the door, etc. we should withhold judgement.

It wouldn't surprise me to find something incriminating, but the presense of "off the charts" radioactivity is not that big a deal in itself.