DET NORSKE VERITAS MANAGEMENT SYSTEM CERTIFICATE Certificate No 59012-2009-AQ-CHL-RvA This is to certify that PSI CHILE LTDA. at Av. Apoquindo 3721, Of 141 - Las Condes - Santiago - Chile has been found to conform to the Management System Standard: ISO 9001:2000 This Certificate is valid for the following product or service ranges: DESIGN AND ENGINEERING SERVICES: CONCEPTUAL AND PREFEASIBILITY STUDIES, FEASIBILITY, BANKABLE FEASIBILITY, BASIC AND DETAIL ENGINEERING Initial Certification date: Place and date: 11.01.2009 Buenos Aires, 06.08.2009 This Certificate is valid until: for the Accredited Unit: 11.01.2012 DNC CERTIFICATION B.V., THE NETHERLANDS The audit has been performed under the supervision of: Manuel Burgos Julio Raúl Martinoli Lead Auditor Operation Manager Lack of fulfilment of conditions as set out in the Certification Agreement may render this Certificate invalid. DET NORSKE VERITAS S.A - Carlos Pellegrini 1023 4º Piso (C1009ABU) Buenos Aires – Argentina