Directors and/or Chief Executive Officer and/or a person assigned by the Board of Directors and/or Chief Executive Officer to be empowered to consider and determine other details in relation to such

. Please be informed accordingly Yours sincerely -signed- (Mr. Chaiwat Kovavisarach) Chief Executive Officer and Managing Director Investor Relations Division Tel: 02-140-8952

million. Yours faithfully, PATKOL PUBLIC COMPANY LIMITED (Mr.Sangchai Chotchuangchutchaval) Chief Executive Officer 2/2

received an investment promotional certificate in the business industrial water for the Wellgrow project. Yours Truly, WIIK & HOEGLUND PUBLIC CO., LTD. Mr. Wiboon Sangwithayanon Chief Executive Officer

Sangwithayanon Chief Executive Officer

contract value of Baht 436.32 million Supareuk Na Songkhla Mr.Supareuk Na Songkhla (Chief Executive Officer)

PUBLIC CO., LTD. Mr. Wiboon Sangwithayanon Chief Executive Officer

Yansopananan (Chief Executive Officer)

company determines the provision for the said loss on impairment of the investment. For your kind acknowledgement. Yours Faithfully, HYDROTEK PUBLIC COMPANY LIMITED Mr. Sarun Yanasopananan Chief Executive

group 733.46 678.37 Water management business group (only amount recognize in year 2018) 137.49 67.53 Total 870.95 745.90 Yours Truly, WIIK & HOEGLUND PUBLIC CO., LTD. Mr. Wiboon Sangwithayanon Chief