It sounds as if the D-X gas is intact. They're going to test it, I suppose to get a chemical fingerprint, to aid in detecting whether ground gasoline contamination is recent or old.
I'd think the lead would be a good clue...
Anyways, here's a link I hope works. http://www.comcast.net/news/strange/index.jsp?cat=STRANGE&fn=/2007/06/25/698974.html