Oceana Gold New Zeland Limited Hydrogeology Support for WKP Underground Updated Conceptual Model 4.3. As previously presented in Figure 2-1, two test holes were advanced to intercept the T-Stream vein, WKP-104 and WKP-03D. Both holes were advanced from drilling pads west of the T-Stream vein. WKP-104 was specifically designed to intercept the T-Stream vein beneath the area where it outcrops in the stream itself. The borehole was advanced at an azimuth of 134o and a dip of 27.5degrees, for hydraulic testing purposes. A total of four (4) hydraulic tests were completed in this borehole. Figure 4-11 presents a schematic cross-section parallel to bore WKP-104 showing key geologic contacts, the extent of the vein system, results of hydraulic testing, and the calculated water table elevations. Figure 4-11 Schematic cross section of WKP-104 From the data presented in this figure below and the data processed this section shows: Hydraulic conductivity values range from 9.8E-8 m/s to 4.1 E-6 m/s. Hydraulic conductivity values in the hanging wall rhyolite flow dome are quite low. Two of the three zones tested in the hanging wall were dry, with the shallowest test indicating confined conditions. The test in the footwall has slightly higher K, and a deeper water table. Based on these observations, it does not appear that the T-Stream vein or shallow groundwater is connected to the T-stream vein, although the vein was not tested directly in this hole.
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