First off, Race's comment was beyond the pale and my response has nothing to do with his posts.
This bone has measurable/detectable amounts of C-14 in it. We are told that the C-14 is there from water contamination and not because it was there when the dino was alive. Therefore, if ground water contamination is the source for C-14, the fossils themselves cannot therefore be considered hermetically sealed.
Trace amounts of C14 can be created by radioactivity in rocks.