Bore completion - Surprise Creek outstation DLH-218
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Technical Report WRD89069 Viewed at 15:07:59 on 29/07/2010 Page 6 of 16. TABLE 1 STRATIGRAPHY AND LITHOLOGY CAINOZOIC (CZ8) LOWER PROTEROZOIC McArthur Group Tawallah Group Soil, sand, laterite Karns Dolomite (Pmk). dolomite, dolarenite, oolitic chert. Masterton Formation (Ptn) sandstone, feldspathic sandstone, conglomerate. with possible intercalated Gold Creek Volcanics (Ptg) andesine basalt, tuffaceous siltstone. Nollogorang dolomitic feldspathic dol arenite , dolomite. Formation (Pto) siltstone, sandstone, silty and sandy Three bore sites were selected to take advantage of secondary porosity ,.;i thin the Lmver Proterozoic sediments. These were located on geological lineaments interpreted from aerial photographs and observed during ground reconnaissance. Bore 26067, the only one drilled, intercepted an aquifer of fractured dolomite and chert between 27 m and 30 m. This yielded approximately 10 Lis (airlift) of good quality water. The bore was drilled to a total depth of 64.6m with no increase in discharge. 3. WATER QUALITY water samples were collected during pump testing of Bore 26067. Water quality analysis results are summarised in Table 2. Results are within recommended limits for drinking water as adopted by the Australian Water Resources Council/National Health and Medical Research Council (Reference 2) 015:GDWT3