SET Announcements

= = Translation = = Ref: CK-05-0000-PO-L-0125 May 3, 2005 Subject Signing the Construction Contract Attention President The Stock Exchange of Thailand Since CH. Karnchang Public Company Limited has been granted for the Construction Contract with PTT Public Company Limited as to perform the works for the Construction of Supply and Installation of Suvarnabhumi - Phayathai NGV Gas Pipelines Project. As such agreement is a normal business in conformity with the ordinary business conditions whereby the Company had ever entered into an agreement with the other companies as its details are the followings : Signing Date April 28, 2005 All cost of agreement Baht 380,000,000 (VAT excluded) (Three Hundred Eighty Million Baht only) Completion period 210 days For your information. Sincerely yours, =Anukool Tuntimas= (Mr. Anukool Tuntimas) Executive Vice President Human Resource and General Administration