Ref. SCG-SET-05-015 May 9, 2005 To: The President The Stock Exchange of Thailand Re: To notify the 20% decrease of the generated earning from operating activities Sahacogen (Chonburi) Public Company Limited is pleased to notify that the net income of the operating result of the first quarter ended March 31, 2005 was 33.39 million Baht, 41.84 million Baht or 55.62% lower than the previous year. This was resulted from the incremental cost of goods sold consisting of the 38.84 million Baht for major overhual of two generator sets and 3 million Baht depreciation. Please be informed accordingly. Yours sincerely, (Mr. Viroj Theeravatvatee) Managing Director