At the July 26, 2010 press conference, Richard Fausset of the Los Angeles Times asked:
There have been reports of very large undersea plumes of oil thousands of feet below the ocean's surface. So when you say there's the possibility of the shore being impacted for four to six weeks, how do you come up with that four to six week number? And are you taking into account these very large plumes of oil that are out there and very difficult to sort of gauge where they're going?
National Incident Commander Thad Allen responded, "Four to six weeks I'm using comes from what we actually observe" on the surface.