[Translation] Ref. PDI.B.02.94/99 1 December 1999 To : President The Stock Exchange of Thailand Re. : Certification of ISO 9002 This is to inform the SET that Padaeng Industry Public Company Limited (PDI) has been audited and compliance to the requirements of ISO 9002 for the scope of "Manufacturing of Zinc Ingot and Zinc Alloy" and recommended for such standard certification by Bureau Veritas Quality International of United Kingdom effective from 5 November 1999. The corresponding certificates are expected to be received by December 1999. Yours truly, - Signature - (Pinit Wongmasa) President & CEO Board Secretary Division Tel. 661 9900 Ext. 230