This panel that the Alberta government has put in place is to try to reconcile these different views of this data. Dr. Schindler will be sitting down with other scientists to assess this.
It's important to note as well that the Athabasca River has hydrocarbon that outcrops on the bank of that river as part of its normal course. This means you have hydrocarbon bitumen entering the Athabasca River just through that outcropping of the oil sands resource itself. Separating out the background levels of substances that arise from those natural sources of oil, versus the oil sands, is one of the real challenges.