Starting the operation after annual turnaround

TRANSLATION 1000/041/2005 February 21, 2005 The Stock Exchange of Thailand 62 Ratchadapisek Road, Klongtoey Bangkok 10110 Subject : Starting the Operation after annual turnaround Attention : President of The Stock Exchange of Thailand With regard to the announcement of the Bangchak Petroleum Public Company Limited dated January 20, 2548 that the Company would shut down the operation of plant No.2 and 3 for annual turnaround during the period of January 24, 2005 - February 17, 2005. Please be informed that The Company already finished the annual turnaround and will resume the normal operation for both plants since February 18, 2005. Please be informed accordingly. Sincerely yours, (Patiparn Sukorndhaman) Senior Executive Vice President Accounting and Finance Corporate Planning and Investor Relation Office Tel: 0-2335-4583