SET Announcements

Ref: CK-06-0000-AFS-L-0150 August 15th, 2006 Subject : Declaration of Operating Result of 2nd Quarter Ended June 30, 2006 Compared with the 2nd Quarter Ended June 30,2005 Attention : President The Stock Exchange of Thailand CH.Karnchang Public Company Limited, Subsidiaries and joint ventures have the operating result of the three months period and six months period as of June 30, 2006 reached the increased profit of 33.6% and 223.3% respectively compared with the same fiscal year of 2005 due to the following factors : 1. In the 2nd Quarter of this year , three months period and six months period , the company has an increasing income from the construction work resulting from the progress of some projects which have high value, such as Southen Outer Bangkok Ring Road Project,The Ground Improvement for the 1st Midfield Satelite Aporns and 3rd Runway Project and Nam Ngum2 Hydroelectric Power Project. 2. The company has gained on sales of short term investment in amount of 1,000 million baht and 172 million baht in the first quarter and second quarter of this year respectively. For your consideration. Sincerely yours, (Mr.Plew Trivisvavet) (Mr.Narong Sangsuriya) Directors