ARC Resources Ltd./ARC Energy Trust Announce the June 2008 increase to the ARX Exchangeable Shares Exchange Ratio

CALGARY, June 2 /CNW/ - (AET.UN and ARX - TSX) ARC Resources Ltd. along
with ARC Energy Trust announces the increase to the exchange ratio of the
exchangeable shares of the corporation from 2.34894 to 2.36758. Such increase
will be effective on June 16, 2008. The following are the details on the
calculation of the exchange ratio:

<<
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10 day
weighted
average
Record trading Effective
date of ARC price of date of
ARC Energy AET.UN the Exchange
Energy Trust (prior to Increase increase ratio as
Trust Opening distrib- the end in in of
distrib- exchange ution of the exchange exchange effective
ution ratio per unit month) ratio (xx) ratio date
-------------------------------------------------------------------------
May 31, 2.34894 $0.24 $30.2471 0.01864 June 16, 2.36758
2008 2008
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(xx) The increase in the exchange ratio is calculated by dividing the ARC
Energy Trust distribution per unit by the 10 day weighted average
trading price of AET.UN and multiplying by the opening exchange
ratio.
>>

A holder of ARC Resources Ltd. exchangeable shares can exchange all or a
portion of their holdings at any time by giving notice to their investment
advisor or Computershare Investor Services at its principal transfer office in
Suite 600, 530 - 8th Avenue SW, Calgary, Alberta, T2P 3S8, their telephone
number is 1-800-564-6253 and their website is www.computershare.com.

ARC RESOURCES LTD.
John P. Dielwart,
President and Chief Executive Officer