Signing 3 contracts

ST. 010/2010/0017 April 8th, 2010 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 3 new contracts. The details of the projects are as follows: Project 1 Project name: Design and Build for the Building, Green Mill Project (Contract signed on February 3rd, 2010) Project owner: BRP Steel Co., Ltd. Contract value: THB 347,750,000.- (Include VAT) Scope of work: Design and Build for the Building Construction period:450 days Project 2 Project name: Skills Assessment Center (Contract signed on March 12th, 2010) Project owner: MTP HPPO Manufacturing Co., Ltd. Contract value: THB 17,026,705.63 (Include VAT) Scope of work: Establish and manage the Skills Assessment Center Construction period:18 months (26 March 2010 - 30 September 2011) Project 3 Project name: Thailand Propylene Oxide under the Thai Growth Project (Contract signed on November 11th, 2009) Project owner: MTP HPPO Manufacturing Co., Ltd. Contract value: THB 351,415,470.50 (Include VAT) Scope of work: Mechanical and Equipment Installation Construction period:2 November 2009 - 31 March 2011 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, 274 Facsimile: 0 2259 4427