Thank you, Ms. Duncan.
Following up on Mr. Thompson's answer, there are two types of water in the mining industry surface water--the water that comes in contact with the oil sands and the water that doesn't. If the water does not come in contact with the oil sands, it is typically diverted around the mine, as Mr. Thompson said, and back into the watershed. If it does come in contact with the oil sands, it is collected in a closed-circuit loop to prevent it from returning back to the ecosystem and potentially having some impacts from dissolved hydrocarbons and substances.
I do want to recall that when we're talking about the full water balance, we did look at a very dry period for the Oil Sands Developers Group forecast of the amount of water that might be withdrawn from the Athabasca River. During those very dry periods, there is very little surface water precipitation. So while it doesn't account for 100% of the water, because there's always some precipitation and some groundwater that needs to be pumped, it is a fairly robust number.