I was at a scrap yard one time, waiting by the pay window, when an alarm went off. Turns out it was a radiation detector. The scale man asked a few pointed questions, and it turns out that the fellow riding in the passenger seat of the truck on the scale was a cancer patient, and had some sort of radioactive implants, which had set of the alarm.
Before that, I'd never even realized that yards have radiation detectors to prevent radioactive material from even coming through the gate. One would have to assume that radioactive material in a load of scrap, any load of scrap, is a no-no, and a potential problem that the industry is prepared to prevent.
Fast forward a couple of years, to a different yard.
I'm waiting in line, when I observe one of the yard's laborers digging in their own garbage dumpster. He pulls out what is obviously a dental X-ray unit, and, with a big smile on his face, carries it inside. A few minutes later, he comes back, looking disgusted, and tosses it back in the dumpster. I asked him, "That was radioactive, wasn't it?" He answered that it was.
(Obviously, somebody had tossed it, because the yard couldn't accept it. The fact that it's probably now in a sanitary landfill someplace didn't seem to be an issue, as long as it didn't enter the scrap metal
Anyway, the moral of the story is that you might be playing with something radioactive there, which now that it's in your hands, could be your
problem to dispose of, hopefully properly, which would probably be very expensive I imagine.
Maybe somebody else has more specific knowledge than that anecdote.