Signing 2 contracts amounting to THB 486,240,585.78

ST. 010/2009/0042 August 6th, 2009 Subject: Signing contracts Attention: The President The Stock Exchange of Thailand Sino-Thai Engineering & Construction Public Company Limited is pleased to inform the SET that the company has signed 2 new contracts. The total values of the contracts, amounting to THB 486,240,585.78. The details of the projects are as follows: Project 1 Project name: General Mechanical, Structural Steel and Insulation for Thai Growth Project - Power, Utilities and Infrastructure (Contract signed on May 29th, 2009) Project owner: MTP HPPO Manufacturing Co., Ltd. Contract value: THB 286,119,139.55 (Include VAT) Scope of work: General Mechanical, Structural Steel and Insulation works Construction period:444 days (29 May 2009 - 15 September 2010) Project 2 Project name: Civil and Building Work for Thai Growth Project - Thailand Propylene Oxide (Contract signed on June 1st, 2009) Project owner: MTP HPPO Manufacturing Co., Ltd. Contract value: THB 200,121,446.23 (Include VAT) Scope of work: Civil and Building works Construction period:427 days (1 June 2009 - 31 August 2010) 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 Company Secretary Office Telephone: 0 2610 4900 ext. 212, 305, 274 Facsimile: 0 2259 4427