GHD | Oceana Gold New Zealand Ltd. | 12552081 | Waihi North Project 35 4 WATER QUALITY 4.1 Background 4.1.1 Mataura Stream Baseline water quality has been collected from a site adjacent to the main infrastructure area (MS1) over a period stretching 2006 to 2021, from a location further up catchment (MS2) and the main tributaries within the WSFA footprint (MT1 and MT2) during 2020 and 2021 (Figure 22). Figure 22 Mataura Stream Water Quality Sampling Locations Baseline water quality data suggests the catchment is relatively un-impacted with low concentrations of dissolved trace elements and sulphate. Some elevated trace element concentrations are potentially the result of exposed mineralisation within the catchment. Minor elevated concentrations of nitrate suggest an agricultural influence on water quality on site. The summarised baseline water quality data is provided in Appendix D. 4.1.2 Wharekirauponga Stream Baseline water quality data from the Wharekirauponga Stream has been collated for the key monitoring data stations T Stream West, T Stream East, WKP01, WKP02 and WKP03 (Figure 15). Data for 2020 and 2021 has been collated as representative of current conditions and is provided in Appendix D. Baseline water quality data suggests the catchment is relatively un-impacted with low concentrations of
RkJQdWJsaXNoZXIy MjE2NDg3