Sign contract of the V/O of Ratchaburi Power Plant

ST. 010/2006/0006 January 10th, 2006 Subject: Contract Signing of the Variation Order of Ratchaburi Power Plant Project Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited is pleased to inform the SET that the consortium of Mitsubishi Corporation and Sino-Thai Engineering and Construction Public Company Limited has signed new contract which has details as follow: Project name : The variation order No. 1 - 4 for 2x700 MW Gas Fired Combined Cycle Power Blocks Project of Ratchaburi Power Company Limited Project owner : Ratchaburi Power Company Limited Contract value: THB 286,509,506.97 (Exclude VAT) Scope of work: Pre notice to proceed work includes improving gas receiving station Construction period :according to the main contract (29th March 2005 - 31st March 2008) It is therefore informed for your acknowledgement and dissemination to the public and other investors. Yours sincerely Mr. Woraphant Chontong SEVP. Financial and Administration Division