Louisiana - Oil Linked to BP - NYTimes.com Tests performed on Thursday confirmed that the oil found on the Louisiana shoreline after Hurricane Isaac was in fact from the BP spill in 2010. While the oil led to the closing of some waters to commercial fishing, samples taken elsewhere in the Louisiana marsh also matched the oil from the spill, said Edward B. Overton, an environmental sciences professor at Louisiana State University. BP said that it was performing its own tests, but that the cleanup of oil was continuing.