Pulacayo Project Feasibility Study - Apogee Silver

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Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 21.2.2 Basis of Estimate The underground mine operating cost estimate is determined from multiple modeling approaches, life cycle costing for mining fleet, zero based costing for the mining consumables, first principles costing for the labour and an activity base costing approach for the remainder of the cost elements. The estimate is derived from two models, the mining fleet model, which forecasts the maintenance and replacement costs for the entire mining fleet and all other vehicles owned by the operation, and the consolidated cost model, which consolidates all other cost components. The mining OPEX costs consist of the following: Mining and backfill consumables and materials (drill steel, drill bits and explosives, backfill reagents: flocculant, cement, wear parts, repair parts, etc.) Utilities (power, diesel, air, etc.) Ventilation maintenance schedule Mining fleet maintenance (Predicted Operating Costs (POC), Ground Engaging Tools (GET) replacements, etc. Underground infrastructure maintenance (maintenance costs for piping, electrical equipment, cable, lighting, instrumentation, etc.) Technical service consumables (fixed monthly costs for the consumables required for the maintenance of gas detection equipment incurred every three years) Labour (derived based on the production requirement for each time period, a leave allowance of 12% was catered for over and above the labour complement) Mine administration consumables and transport (fixed monthly costs based on costs rates provided by Apogee) The processing OPEX costs consist of: Operating supplies o o o Wear parts (grinding media, liners, filter cloths, etc.) Reagents and consumables Services and utilities (energy, engine oil, diesel, etc.) Maintenance supplies, engine oil and lubricants Labour General and administration costs include the personnel costs for management and administrative support functions, insurance, legal service office expenses, external assays, camp catering and maintenance, accommodation and transportation (crew, staff flights, etc.) costs. Environmental testing and studies are also considered. G&A costs are in accordance with the Owner´s Costs by Apogee. The following items are included: Third Party Services: Catering, Camp Cleaning, Maintenance and Refuse Removal TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 273
Pulacayo 1 000 t/d Phase I Feasibility Study - NI 43-101 Technical Report 090644-3-0000-20-IFI-100 External Assays External Consulting and Software Equipment and Vehicle Rental (Heavy and Light) IT and Communications Safety/Protective Clothing (EPP) Postage, Courier and Light Freight Office/Computer Supplies/Maintenance/Supplies Medical Assistance/First Aid Travel/Accommodation/Camp Access and Internal Roads Maintenance G&A Mobile Fleet (Light Vehicles Maintenance) Insurance/Legal Service Recruitment and Training Environmental Monitoring and Reporting/Environmental Programs/Waste Management Site Security (External) Procurement and Importation Costs The following sources were used to derive the mining and processing OPEX estimate: Design Criteria Vendor data (quotations received from Bolivian and overseas suppliers) Client data Operating practice and industry standards Engineering Handbooks Equipment capital-based factors (direct capital cost) for maintenance supplies cost estimation Labour Survey Allowances for supplies (operating and maintenance), general and administration cost estimation Mechanical Equipment List Plant Power Demand Plant Water Mass Balance Mechanical Drawings and General Arrangements TWP Sudamérica S.A. Av. Encalada 1257 Of. 801, Santiago de Surco Lima 33, Perú (51-1) 4377473 Page 274
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Pulacayo Project Feasibility Study - Apogee Silver

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