I think an explanation of the shallow coals in Alberta might help with this.
The shallow coals in Alberta, which are the primary commercial target, do not produce water. They're dry coals, so we're not faced with the situation of having to pump water to get the gas to move. The fact that they're dry is a very strong indicator that these coals are totally isolated from the overriding aquifers, because if they weren't isolated, you would have water in the coals, which we don't see.