Oceana Gold New Zeland Limited Hydrogeology Support for WKP Underground Updated Conceptual Model 4.2. As previously presented in Figure 2-1, tests holes distributed along the area of the EG-Vein include, from north to south, WKP-102, WKP-04D, WKP-101, WKP-103, and WKP-105. Shallow piezometers WKP-01 and WKP-02 are also located in the central part of the EG vein system. The drilling pad where boreholes WKP-102 and WKP-04D are collared is located the north / northeast portion of the project area, near the northern extent of mineralization as defined to date. These boreholes were advanced at nearly the same azimuth (117o and 120o) nearly perpendicular to the strike of the EG vein system, but at different dips of 20- and 60-degrees to characterize the EG vein system and shallower and greater depths. A total of nine (9) hydraulic tests have been completed in the two boreholes, of which seven (7) generated data of sufficient quality for calculation on hydraulic conductivity. Figure 4-4 presents a schematic cross-section parallel to bores WKP-102 and WKP-04D, showing key geologic contacts (from the latest OGNZL leapfrog model), the extent of the vein system, results of hydraulic testing, and the calculated water table elevations. Figure 4-4 Schematic cross section of WKP-102 and WKP-04D From the data presented in this figure below and the data processed this section shows: Hydraulic conductivity values range from 3.3E-7 m/s to 9.1E-6 m/s. Tests in the footwall of the EG vein have lower K values compared to the hanging wall. Core log review suggests this is due to the presence of relatively unaltered rhyolite with
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