Oceana Gold New Zeland Limited Hydrogeology Support for WKP Underground Updated Conceptual Model Installation depths and water levels are summarized in Table 4-1. The geology of the screened intervals can be summarized as follows: WKP 01S is installed in unweathered, competent rhyolite with high RQD. WKP 01D is installed in weathered rhyolite breccia of low RQD. WKP 02S is installed in moderately to strongly weathered rhyolite flow of moderate to high RQD. WKP 02D is installed in a strongly weathered hydrothermal breccia in the contact zone between a rhyolite flow dome and the surrounding rhyolite volcaniclastics. Table 4-1 Installation depths and water table elevations for shallow piezometers Point E Projected N Projected Installation Depth Real Z (mamsl) WL-Feb/22 Measured water levels suggest strong downward gradients. Hydrographs for each piezometer are shown in Figure 4-2. Rainfall data has been downloaded from Gov.nz, 2022. Link details can be found in References. Figure 4-2 Hydrographs for shallow piezometers
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