Samples are being taken from tar balls showing up on beaches in Southern California to see if the oil could be coming from the pipeline spill in Santa Barbara County.
The LA County Public Health Department closed beaches Wednesday in the South Bay, including Hermosa and Manhattan Beaches, because of the oil. The beaches could open as soon as Friday.
NOAA says its working to track the Refugio spill's movement with help from scientists at UC Santa Barbara. David Valentine is a Professor of Earth Science at UCSB and says tracking this oil presents a unique challenge.