Hector Espinosa Senior Engineer Consultant of Project Nexus

CURRICULUM VITAE Hector Espinosa Senior Engineer Consultant of Project Nexus HISTORY Twenty five years of experience in structural and civil engineering, port and harbors, project development and construction, working on site and at home office. Expertise in civil and structural disciplines for mining mega projects, urban building projects and ports and harbors facilities. In the mining area he has worked in several EPCM project, among them : El Tesoro project, Oxide Project, Sulphide Leach Project, Ma adem Project, El Morro Project, Quellabeco Project and Las Bambas Project. The positions in these mining project have been several, among them CSA structural engineer, project engineer, engineering manager and area manager, on site as well as in home office. Among the mining facilities involved in the EPCM mining project where important skills have been achieved are the following: Marine facilities (including ports and suction and discharge water pipelines 540 L/s), desalination plants, water and sewer plants, pads and lixiviation pads, ponds, pipelines, roads, railroads, power lines, pump stations, fuel and water tanks, mining buildings (Stock piles, domes, EW, concentrators, screening, crushing, ancillary buildings, camps, SX..), overland conveyors, elevated conveyors, retaining walls (concrete and earth reinforced), massive earth works platforms, dumping places, borrow places. Experience in Preparation and/or review of engineering and construction contracts, terms of references and proposals evaluation, within private business context and also within public business context (Ministry of Public Works context ) in Chile. Experience in planning, coordination, writing, and control of final reports for mining mega projects in Chile and other countries. (English language). EXPERIENCE SUMMARY 2010 2012 Hector Espinosa Escobar Ingenieros Consultores e.i.r.l and Project Nexus S.A. Working as a private Consultant for Mining and Port Projects. General Manager, Starting December 4, 2010. Main works are the following: Las Bambas Project: Project Engineer for Infrastructure Area (for Xstrata/Nexus). Facilities included : Port, Railroad, Roads, Power line, Concentrate Pipeline. Project Language: English. Senior CSA Engineer for the relocation of a Rute 5 sector, (for P3 Consultores). Other Miscellaneous Projects 2009 2012 Project: Quellaveco Mine Project Feasibility Study Optimization) Client: Anglo American AAQSA / Project Location: Southern Peru. Area Manager for Power Supply, Port facilities, Concentrate Transportation, Pipe Lines and Water Management. Manager for the writing of final report, including Fluor and AAQSA sections and appendixes. Project integrator. Integrates all information developed by the Owner, Fluor and third parties. 1

Project Language: English. 2009 Project : Escondida Ore Access Project Identification and Definition Studies Client : BHP Billiton Project Location : Chile, II Region, Escondida Mine Civil Structural Discipline Lead for 5 options under analysis, and Final Report Manager for the Definition Study. The project consists on the relocation of two primary crushers and all related facilities. Several options are being analyzed which include demolitions, mine haul truck operation platforms, earth reinforced walls, crushers, elevated conveyors, bins, transferring towers, concrete retaining walls, corrugated tunnels, and other facilities. Manager for the writing of final Selection Report for Fluor & BHPB. And preparation of Project Execution Plant and Work Plan for the next phases of the project. Report Language: English. Project language: English 2008 2009 FLUOR INTERNATIONAL INC. AUSTRALIA, Brisbane Project : Ma aden Project Feasibility Study Client : Az Zabirah, Saudi Arabia Project Location : Saudi Arabia. Definitive Feasibility Study Manager, and Risk Manager. The project consisted on an aluminum plant and all its related facilities. Further project description is not included on this resume. The main tasks of the Feasibility Report Manager consisted on the definition, planning, and execution of the Final Feasibility Report, including the coordination and control of all specialist and subcontractors in several languages (such as Arab, English and Spanish), The task included definition of procedures, schedule, QA/QC, table of content, and the coordination for the development of each report section and its appendixes. As a Risk manager coordinator during the lasts months of the project, the main tasks consisted on the management of project risk and business risk. The feasibility study was developed in Brisbane, Australia, and has completed its first stage. All task mentioned above were developed in Brisbane, Australia. 2007 2008 Project : Quellabeco Basic Engineering Study +/ 10 %. Client : Anglo American AAQSA. Project Location: Peru. Project language: English/Spanish. Report language: English Area Manager for the Port, pipelines, power lines, topography and water collection and retention facilities areas. Final Report Manager during the final report development. 2

2006 2008 Project : El Morro Feasibility Study +/ 15% Client : Xstrata. Project Location : Chile, II Region. Project and report language: English Area Manager for Port, Desalination plant, Concentrate pipeline, power supply and others. Manager for the El Morro Final Feasibility Report. 2005 2006 Project : Eiminco Fure Feasibility and Basic Engineering Study +/ 15 % Client : Codelco Chile Project Location: Chile, II Region, Chuquicamata Mine. Area Manager and Civil, structural and Architectural Discipline Lead. Mine expansion consisting on the implementation of a new concentrator plant, stock pile buildings, settlers, pipe racks, massive earth works for haul trucks, and others. 2003 2004 Construction Project : Sulphide Leach Client : BHP Billiton Project Location: Chile, II Region, Antofagasta and Escondida Mine. Area Manager and Civil, Structural and Architectural Discipline Lead on site, during the construction of the following facilities: Sea water intake, desalination plant, water pipeline ( 165 Km length from 0 to +3400 m.a.s.l. Q > 500 m3/s ), and other buildings and pipe racks structures. 2002 2003 FLUOR CHILE S.A Project : Sulphide Leach Feasibility Study and Detail Engineering. Client : BHP Billiton Project Location: Chile, II Region, Antofagasta and Escondida Mine. Discipline lead for civil, structural and architectural disciplines for the sea water intake, desalination plant, water pipeline ( 165 Km length from 0 to +3400 m.a.s.l. Q > 540 m3/s ), and other buildings and pipe racks structures. 2002 SNC LAVALIN CHILE Project : Mejillones Smelter and Refinery Basic Engineering +/ 15 %. Client : Codelco Chile Project Location: Chile, II Region, Mejillones 3

Discipline lead for civil structural and architectural discipline. The project consisted on two smelter plants and one refinery plant, including all related civil works such as acid plant, railroads, stock pile buildings, roads and bridges. 1999 2001 MINERA EL TESORO Construction Project: El Tesoro Mine (EPCM) (18 months on site construction Client: N/A (working for the owner El Tesoro Mine). Project Location: Chile, II Region, Calama / Sierra Gorda. Civil Structural Engineering Manager on site for Minera El Tesoro, at El Tesoro Mine, Chile.): Earth reinforced wall (18 meters high on seismic zone), primary crusher, secondary and tertiary crusher, screening building, Stock Pile building, overland and elevated conveyors, solvent extraction plant, electro winning plant, PLS ILS Ponds, dynamic leach pads, water line system from Calama City to El Tesoro site (75 kilometers length) and miscellaneous facilities. 2001 2002 Project: Sulphide Leach Project Feasibility Study. Client: BHP Billiton. Project Location: Chile, II Region, Antofagasta and Escondida Mine Civil, Structural and Architectural Discipline Lead (see project description above). 2001 2002 Project: Modernization of Refinery N 2 Basic Engineering. Client: Codelco Chile. Project Location: Chile, II Region, Chuquicamata Mine. Civil, Structural and Architectural Discipline Lead. 1998 2000 HECTOR ESPINOSA / CARLOS ESPINOSA ENGINEERING Minera Escondida Basic Engineering for expansion of SX/EW Plant (March 1999 for Fluor Daniel Chile). Vibration analysis for existing secondary and tertiary Crusher building including soil structure interaction, Mina Lomas Bayas (February 1999 for Fluor Daniel Chile). Calculations of Retaining walls for sewer system at Zanjón de la Aguada (Febrero 1999 for Cruz y Dávila Ltd.). Calculation of Structural expansion and reinforcement of Mine Process Building at Salar de Atacama Mine (Planta Salar de Atacama). (December 1998 to April 1999 for Minsal). 4

1997 1998 Construction Project: Oxide (EPCM) (18 months on site construction). Client: BHP Billiton Escondida Mine. Project Location: Chile, II Region, Escondida Mine. Deputy Engineering Manager on site, and Civil, structural & architectural Discipline Lead on site. Constructed facilities: Primary crusher building, secondary and tertiary crusher buildings, screening building, stockpile building, Tank Bin Building, elevated and overland conveyors, lixiviation leach pads, tank farm plant, electro wining plant, earth reinforcement wall (30 meters high on seismic zone UBC 4), tunnels, roads, railroads, and all civil works. 1996 1997 Project: Oxide Detailed Engineering. Client: BHP Billiton Escondida Mine. Project Location: Chile, II Region, Escondida Mine. Structural Calculations, and subrogate discipline lead for structural works. (see project description above). 1995 1996 Project: Alumbrera (EPCM) Client: Anglo American. Project Location: Argentina, Tucuman and Catamarca. Detailed engineering and construction phases: Structural Calculations, Coordination, Site Inspection for Filter Plant. Works: Civil works, roads, railroads, conveyors, stockpile building, Primary and Secondary Crushers, Screen Buildings, Piles at sea facilities, pre excavated piles at Rosario Plant (precast, concrete and pile testing included). 1993 1995 HECTOR ESPINOSA / CARLOS ESPINOSA ENGINEERING (Private works from previous years are also included). Ports and Harbors Engineering Projects: Bathymetry Works and Basic engineering for Medium Size Vessel Pier. Client: Navimag. Location: Chaitén, XI Region, Chile. (1996). Detailed Engineering for Steel Floating pier (40 m length x 25 m wide), Berthing and mooring facilities, access bridges and miscellaneous. Client: Scorpios Company. Location: Puerto Montt, X Region, Chile (1996). Structural Evaluation of an existent medium size vessel shipyard (Steel piles and Steel superstructure) and basic engineering for a new shipyard. Client: Pesquera Nacional. Project Location: Talcahuano, VII Region, Chile (1993). Bathymetry works for Basic engineering for industrial vessel shipyard. Client : Astilleros Kotesky. Project Location : Coquimbo, IV Region, Chile ( 1993 ). Bathymetry works. Client : Astilleros Kotesky. Project Location: Laguna Verde, V 5

Region, Chile (1993). Port Facilities for Fishing medium size ships. Detailed Engineering. Client: Ministry of Public Works. Location: Tongoy and Guanaquero Beaches, II Region, Chile. (1991 1992) Works: Maritime steel piles, breakwaters, wave refraction and reflection analysis. Structural Evaluation and Analysis for Caldera pier, submarine inspection included. Client : Dicaser Ltda. Location: Caldera II Region, Chile. (1991). Detailed Engineering for Montemar Shipyard (industrial vessels). Client: Astilleros Montemar. Location: San Antonio Port. Detailed Engineering for Shipyards, medium size Industrial Vessels. Client: Astilleros Kotesky. Location: Arica, Chile (1990). Technical Counterpart in the detailed engineering project Policarpo Toro Port Facilities". Client: Interquímica Ltda. Location: San Antonio Port. (1989). Works: Steel piles, dolphins, retaining walls, fender systems, miscellaneous. Concrete Building Projects in Santiago, Chile ( Unless other location is indicated ). Detailed Engineering, Calculation for Recoleta Building (3 stories). Client: Constructora Santiago Hunfán y Asociados (1995). Detailed Engineering, Calculation for expansion of gym at Usach. Client: For Constructora Rodolfo Gomez Ltda. (1995). Detailed Engineering, Calculation of foundations and steel support structures and energy lines on substations. Client: Eleconsult Ltda. (1995). Detailed Engineering, Structural Calculation for S/E 110 KV y S/E 220 KV, and High Voltage structural support towers, for air transmission lines of 110 KV y 220 KV. Client: Eleconsult Ltda. (1994). Detailed Engineering, Structural Calculation for Sr. Ramón Pinto house. Client: Ramón Pinto. Location: Los Andes, Curimón (650 m2). (1994). Architect Mr. Rodrigo de la Cruz. Detailed Engineering, Structural Calculation for La Lisera (5 floors ). Client: Fernando del Sol y Asociados. (1994). Location: Arica, Chile. Detailed Engineering, Structural Calculation for Building Estudio ( 9 floors ), Client : Fernando del Sol y Asociados. (1994).Location: Viña del Mar. Detailed Engineering, Structural Calculation for remodeling of building Bilbao S/N (4 stories). Client Fernando del Sol y Asociados. (1993 ). Detailed Engineering, Structural Calculation for Building Arica II (5 stories). Client: For Fernando del Sol y Asociados. Location: Arica, Chile (1992). Detailed Engineering, Structural calculation for building Encomenderos B. (18 floors ). Client: Fernando del Sol y Asociados (1992). Location: Santiago. 1993 CONSORCIO "RFA INGENIEROS (CHILE) FREDERIC HARRIS (USA) CADE/IDEPE (CHILE) Project: Detailed Engineering and Construction of Berths 4 y 5, Valparaiso Port. Client: Empresa Portuaria de Chile, Armada de Chile, Ministerio de Obras Públicas de Chile. Project Location: Chile, V Region, Valparaiso. Structural Discipline Lead Detailed Engineering Project : for Commercial Vessels Berths for berthing and mooring structures, berths 4 y 5, Valparaíso Port, Chile. 12 meters draft. Yard and maritime structures for conventional and port cranes. Project Language: English. 6

1992 1993 CONSORCIO "MOFFATT & NICHOL (USA) INECON (CHILE) Project: Detailed Engineering for berths N 1,2 y 3 at Valparaiso Port. Client: Empresa Portuaria de Chile, Armada de Chile, Ministerio de Obras Públicas de Chile. Project Location: Chile, V Region, Valparaiso. Engineering Manager/Coordinator. Maritime and yard facilities and structures for equipment and portal cranes (Vessel 12 meter draft). Works: Concrete pier, steel piles,( 40 meters long, and 1.2 diameter) retaining walls, railroads, pavements, dredge work and buildings. 1990 1992 CONSORCIO "RFA INGENIEROS (CHILE) FREDERIC HARRIS (USA) CADE/IDEPE (CHILE) Project: Detailed Engineering for berths N 1,2 y 3 at San Antonio Port. Client: Empresa Portuaria de Chile, Armada de Chile, Ministerio de Obras Públicas de Chile. Project Location: Chile, VI Region, San Antonio. Structural Discipline Lead Detailed Engineering Project. Maritime and yard facilities and structures for equipment and portal cranes (Vessel 12 meter draft). Works: Concrete pier, steel piles, (30 meters long, and 1.1 diameter) retaining walls, railroads, pavements, dredge work and buildings. 1987 1989 MINISTRY OF PUBLIC WORKS, PORTS AND MARITIME DIVISION Review of several projects, Detailed Engineering and Construction Inspection, for maritime facilities to be build by private or public enterprises along Chilean coast. Bathymetry at the following islands: Alao, Apiao, Achao, Meulín, (Chiloé). Taltal Shipyards (Basic engineering). Steel piles and concrete deck. San Vicente Shipyard (Detailed engineering). Steel piles and concrete deck. Caldera Shipyard (Basic Engineering). Steel piles and concrete deck. Breakwater at Higuerillas Caletas (Detailed Engineering). Rock and Dolosses, and concrete walls and miscellaneous. Basic engineering for Quellón Pier. Steel beams, concrete deck, steel piles, and miscellaneous. Basic engineering for Melinka Pier. Steel beams, concrete deck, steel piles, concrete caissons and miscellaneous. Detailed Engineering for Barón Pier, Valparaíso, Chile. Berths N 9 and 10, Valparaíso Port, 12 meters draft, concrete deck and precast concrete piles filled with coarse material, 6.5 meters diameter, 12 meters depth. Construction of Berths 6 and 7 at Antofagasta Port. 1988 1989. Ministry of Public Works Representative on site (Inspector Fiscal). Works: Maritime Piles 0.8 meters diameter and 25 meter length, concrete deck, steel cellular sheet pile (18 m. diameter each one) and civil works. 1984 1986 LARRAIN, RUIZ Y SAAVEDRA INGENIEROS CIVILES Detailed Engineering, Structural Calculation, Concrete Buildings for: 7

Building "Estado 10" (23 floors). Building Torre del Paseo (Huérfanos/San Antonio). (25 floors). Stadium Sport Club. (Cerro San Cristóbal Project). Structural Calculation of general building works. Among many others ( All buildings located on seismic zone equivalent to ZONE 4 UBC ). EDUCATION HISTORY 1985 Universidad Católica de Chile Civil / Structural Engineer, Structural Discipline. Special complementary Studies and Training (only main related topic listed): Preparation of Scope of Works Project Risk Evaluation Rigging HSEC Project Management Engineering Management Computer programming LANGUAGES Spanish (native). English (speaking, writing and reading). 8