Vale ESG Presentation Deck

Understanding the TDMS¹ HIRA² deliverables 1 FMEA³, MUE4, Risk Assessment, Controls Coses Best O OF D Fe de fe Root Case what er mig af - De how e mended. fide puti G BA Awe W L w m 2 Vie A Rick A " 4 2 Critical Controle One Pagers he Fa far h S 3 w A And A A M 2 4 4 Hum 4 www Catal DOM w 10 me me M YONE depth Fi YAR N 3 Risk Matrix Severity Very Critical Critical Severe Moderate Low Very Low Total 4 5 Very Remote 6 12 7 5 4 Action List Action Description No. 3 23 Remote 18 13 4 2 0 40 Unlikely 17 2 0 28 Conduct Hydrogeology Study: Determine the cause of the high heads in the left abutment. The local hydrogeology is not well understood. Interim Risk Controls: Implement the following interim risk controls until the hydrogeology study can be completed. inverted fiter A. of the toe of the dam. B. Install pressure relief wells in the left abutment to reduce artesian heads. C. Beach tailings U/S of the dam to reduce the gradients from the reservoir. D. Reduce the normal operating water level in the reservoir. E. Update HIRA, critical controls, TARPS etc, as necessary. Likely Downstream Slope Surface Drainage: Evaluate the erosion damage that could occur during the 1:1.000 and 1:10,000 yr floods. Dedesign the drainage system if damage is unacceptable. 1 1 Active/Inactive Fault Verification: Determine if the fault in the bottom of the valley where the dam is located is active or not. 0 Conduct the following Additional Slope Stability Analyses: A. Effective stress analysis with cohesion intercept equal to 0. i.e. c'= 0 kPa. B. Undrained analysis using pseudostatic analysis C. Deformation study. D. Evaluate and update the critical sections (CC2), instrumentation (OMS) and TARPs (OMS) as appropriate. 0 Calculate Earthquake Induced Settlement of Colluvium Layer Install Additional Information: Install vibrating wire piezometers in existing standpipe piezometers to obtain real-time piezometric data for dam. Very Likely 0 0 0 0 0 0 Reason/Origin Elevated Risk due to adverse conditions Interim Risk Reduction Improve risk understanding Improve risk understanding Risk Reduction Improve risk understanding Improve risk understanding CULTURAL TRANSFORMATION AND KEY BEHAVIORS POLICIES & COMMITMENTS TECHNICAL: Normative Standards and Procedures ORGANIZATIONAL: Roles, Responsibilities and Authorities TECHNOLOGICAL: Systems and Technologies Performance Routine Total 49 26 9 5 5 1 95 Timeline 30-Aug-22 31-Dec-21 31-Dec-22 31-Dec-21 30-Nov-22 30-Jun-21 31-Dec-21 1 TDMS stands for Tailings and Dam Management System. 2 HIRA stands for Hazard Identification and Risk Assessment. 2 FMEA stands for Failure Mode and Effect Analysis. 4 MUA stands for Material Unwanted Event. Risk VALE 18

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