These sensitivities reflect the estimated impact on cash flow per trust unit for the remaining quarter of 2008 and include the commodity contracts described in Note 9 of our third quarter report as well as the impact of 2008 forward market prices as at October 28, 2008. To the extent the market price of crude oil and natural gas change significantly from the October 28, 2008 levels, the sensitivities will no longer be relevant as the effect of our commodity contracts will change.

* Assumes constant working capital and 165,197,000 units outstanding. The impact of a change in one factor may be compounded or offset by changes in other factors. This table does not consider the impact of any inter-relationship among the factors.