TD25C, all the scrap yards here have radiation detectors right at the scale as you pull on, if the load is has any in it, the whole load is rejected, as in it goes to the hazmat center and its so much a pound to dispose of it, and yes the seller is paying the bill. If they can figure out what on the load is giving it off, they have lately been unloading and trying to sort it out and then run the stuff they feel isn't radioactive back through the sensor again, but the seller is billed for all of this and in the end, the seller pays the scrap yard not the other way around.
In order to eliminate this, we've been taking our own stuff down, if the load is "hot" we bring it back home and try to sort it ourselves, the scrap yard will tell you what is normally hot and just sort those items back out and load it again and drive it back to the scrap yard to try the sensor again.
That sensor is so sensitive even the driver themselves can't have gone through any radiation treatments for cancer in the last year or more or they'll set off the sensor as they drive through the scale.
Its not all BS, the reason for this is to keep anything radioactive out of the shredder and out of the press that bales the scrap and off the loads headed to the foundries, because if they hit the foundry and there's even one chunk of radioactive metal in the whole load, it'll set off the detectors and the whole load is rejected, once shredded and baled, then that whole load goes to hazmat and its so much a pound to dispose of it, far more expensive than the value of the load of scrap in disposal fee's alone.
All the scrap yard is trying to do is obey the law and not be held responsible for someone else's radioactive stuff and have to pay that high disposal fee.