Probe of San Francisco Explosion Finds Unusual Welds on Pipes - WSJ.com The board noted discrepancies between utility records on the kind of pipe used and what investigators pulled from the ground after the accident. http://on.wsj.com/hHYkeE Source: http://online.wsj.com/article/SB10001424052748704694004576019722409940728.html?KEYWORDS=ntsb List archives at http://lists.ufl.edu/archives/recmgmt-l.html Contact [log in to unmask] for assistance To unsubscribe from this list, click the below link. If not already present, place UNSUBSCRIBE RECMGMT-L or UNSUB RECMGMT-L in the body of the message. mailto:[log in to unmask]