ข่าวแจ้งตลาดหลักทรัพย์

TRANSLATION No. 1000 / 090 / 2009 May 26, 2009 Subject : Notification on the Shutdown of HCU of the Refinery Attention : President of The Stock Exchange of Thailand The Bangchak Petroleum Public Company Limited (the "Company") would like to inform that the Hydrocracking Unit, a part of the Product Quality Improvement Project (PQI), was shutdown to repair the pumping and valves' control system, damaged during the commissioning process on May 21, 2009. The PQI project is still under the EPC contractor's responsibility as the project has not yet being handed over to the Company. Also, the project is well covered by Construction All Risks and Delay in Start-up Insurance. However, This shutdown will not impact on the Company's retail market sales as the refinery is still operating in normal. If there is any progression, the Company will immediately report to the Stock Exchange of Thailand. Please be informed accordingly. Yours sincerely, -signed- (Anusorn Sangnimnuan) President Office of the Secretary to Board of Directors Tel : 0-2335-4584 Fax : 0-2713-9419