COMMERCIAL OPERATION OF ROI ET GREEN PLANT

No. EGCO 350/211 Date : May 30, 2003 Attn : President of the Stock Exchange of Thailand Subject: Commercial Operation of Roi ET Green Power Plant Reference is made to the periodical report to the Stock Exchange of Thailand on the progress of Roi Et Green Power Project. Electricity Generating Public Company Limited (EGCOMP) would like to inform the SET that Roi ET Green Power Plant with 8.8 MW capacity commercially operated on May 29, 2003. Its whole capacity is supplied to Electricity Generating Authority of Thailand (EGAT) under 21-year Power Purchase Agreement. Yours sincerely, Kraisi Karnasuta President