The Power of Commitment 12552081 3 Waste Rock Selection and Preparation Three separate columns will be set-up using core material representative of waste spoil and/or tunnel/stope lining material from the WKP Ore body. One column will consist of material surrounding the T-Stream Vein (Drill Site 2) and two columns will exist of material associated with the EG Vein (Drill Site 4 (Northern area) and Drill Site 1 (Southern area)). Each column will contain approximately 60 kg of waste rock representative of the Rhyolitic waste material. Waste rock should be sourced from core material as identified by GHD in the provided spreadsheets (to be provided separately). Appropriate material is selected based on core logs, assay data and photos previously provided to GHD from Oceana Gold. Once the selected material for each individual column is selected, the material should be fully mixed prior to being crushed (crushing was previously undertaken by the local SGS lab). This will ensure the maximum particle size is not greater than 60 mm or 20% of the column diameter. Representative samples from each column should be sent for analysis for the parameters detailed in Table 1 The balance of the material should then be placed directly on top of the K1 gravel within the columns. This material should be weighed prior to placing in the column so that total mass of waste within each column is known. A minimum of 150 mm should be maintained between the top of the sample and the top of the column.
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