Siging Contract of Waste water collection & TReatment System

ST. 010/2006/0002 January 9th, 2006 Subject: Contract Signing of the Construction of Waste Water Collection and Treatment System (Phase 2), Nakorn Ratchasrima Project 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 new contract which has details as follow: Project name : Waste Water Collection and Treatment System (Phase 2), Nakorn Ratchasrima Project (Contract No. Kor.16/2549 date 30th November 2005) Project owner : Nakorn Ratchsrima Municipal Contract value: THB 738,657,830 (Include VAT) Scope of work: the construction of waste water collection and treatment system, and related works Construction period : 960 days 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