In about 1991 IIRC Westingtonhouse was running the show and maybe the origional design contractor. After that it changed contractors at least twice likely more times. One contractor came in and started firing people with zero notice including some who had helped design the facility and got it up and going. IIRC that was about 7 or so years ago. My B.I.L. was one of them.
Maybe one of the soon to be fired left a little going away present for the new management team. Not out of the realm of possibility.