SemGroup, L.P., a mid-stream and marketing company filed a voluntary petition for reorganization under Chapter 11 of the Bankruptcy Code in the United States Bankruptcy Court for the District of Delaware. SemGroup listed assets of $6.14 billion and liabilities of $7.53 billion in its bankruptcy filing.

As of this date ARC is not certain of what portion if any of the $26.2 million is collectible but in any case the amount is not considered material to ARC's operations and overall financial position.

ARC Energy Trust is one of Canada's largest conventional oil and gas royalty trusts with an enterprise value of approximately $7.5 billion. The Trust expects full year 2008 oil and gas production to average approximately 64,000 barrels of oil equivalent per day from six core areas in western Canada. ARC Energy Trust units trade on the TSX under the symbol AET.UN and ARC Resources exchangeable shares trade under the symbol ARX.

Barrels of oil equivalent (boe) may be misleading, particularly if used in isolation. In accordance with NI 51-101, a boe conversion ratio for natural gas of 6 mcf:1 bbl has been used, which is based on an energy equivalency conversion method primarily applicable at the burner tip and does not represent a value equivalency at the wellhead. -- www.cnxmarketlink.com