Ref: SCG-SET-04-012 May 7, 2004 Subject:Reporting on the Decrease of Operating Profit Attention: The President The Stock Exchange of Thailand As early informed the company's net income as of March 31, 2004 was 75.23 million Baht. In comparing with the Same quarter of the past year the company had an decremental income amount of 31.05 million Baht or 29.22% this was the results of 1. Reduction of the total revenue of 8.54 million Baht which is equivalent to 1.66 %. 2. Increase of the Cost of Sales amount of 32.47 million Baht which was resulted from the expenses related to the major overhual of the gas turbine unit-1 amount of 22.73 million Baht, incremental depreciation of 6.20 million Baht, the incremental raw material cost of 4.66 million Baht and the incremental backup power of 4.48 milion Baht. Please be informed accordingly. Yours sincerely, (Mr. Viroj Theeravatvatee) Managing Director