, Boondee Amnuayskul (Mr. Boondee Amnuayskul) Chief Executive Officer and Managing Director

Sincerely, -Signature- (Mr. Teerawit Charuwat) Director and Chief Executive Officer

company hereby reports to the SET accordingly. Faithfully yours, Boondee Amnuayskul (Mr. Boondee Amnuayskul) Chief Executive Officer and Managing Director

______________________________ (Mr. Pete Bodharamik) Chief Executive Officer

business group 815.99 620.82 Water management business group (for 2017) 24.59 14.61 Total 840.48 635.43 Yours Truly, WIIK & HOEGLUND PUBLIC CO., LTD. Mr. Wiboon Sangwithayanon Chief Executive Officer

Executive Officer and Acting Managing Director T Engineering Corporation Public Company Limited

. Sincerely yours, (Mr. Sompon Roekwibunsi) Chief Executive Officer Authorized to sign on behalf of the Company

practice of listed company for connected transaction B.C. 2546 (2003) dated 19 November 2003. Please be informed accordingly Yours Sincerely Mr. Pawat Vitoorapakorn Chief Executive Officer

. Please be informed accordingly. Sincerely yours, (Unyarat Pornprakit) Director and Chief Executive Officer Jubilee Enterprise Public Company Limited

International Public Company Limited ______________________________ (Mr. Pete Bodharamik) Chief Executive Officer