Drawing down the remaining copper inventory in a leach pad by way of subsurface leaching

Our investigation covers the first 1000 days of SSL, with 110 PVC wells distributed across five main areas. During this time, we estimate production at 2.26 × 106 kg of copper based on the amount of solution introduced through the wells multiplied by the average copper grade from a number of sources, including monitoring wells and newly formed side slope seeps. Some areas performed better than others, especially where assays revealed that acid soluble copper was greater than 50% of total copper. The SSL program is expected to continue for at least another 1000 days, and we expect an additional 7 × 106 to 15 × 106 kg will be withdrawn from inventory.