No. Esso/SET/002/51 August 1, 2008 Subject: Cessation of Executive of Esso (Thailand) Public Company Limited To: President The Stock Exchange of Thailand Esso (Thailand) Public Company Limited ("Esso") would like to notify the Stock Exchange of Thailand that Mr. Parut Chatikavanij has moved on to a regional position in an affiliated company and has ceased to be the Refinery Manager of Esso with effect from August 1, 2008 Please be informed accordingly Your truly Esso (Thailand) Public Company Limited (Mr. Daniel E. Lyons) Managing Director