The government says water tests have confirmed underwater oil plumes as far as 142 miles from the BP oil spill, but that concentrations are "very low."
NOAA Administrator Jane Lubchenko said that the tests conducted at three sites by a University of South Florida research vessel confirmed oil as far as 3,300 feet below the surface 42 miles northeast of the well site and also oil below-surface oil 142 miles southeast.
Lubchenko said the analysis "indicate there is definitely oil sub surface. It's in very low concentrations" of 0.5 parts per million.
BP had questioned whether oil actually was forming below water.
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