Preliminary tests from Louisiana Oil found oil from BP spill . The coastal protection authority is coordinating with other state agencies to test the contents . Tar balls and an oil mat have been found since Hurricane Katrina . BP says it was already working on wells in the area before the storm .
Preliminary tests from Louisiana Oil found oil from BP spill . Tar balls and an oil mat have been found since Hurricane Katrina . BP says it was already working on wells in the area before the storm .