Attachment 3 - Revised Slope Stability Assessment

Brett Hage                                                                                                  22328-001-Rev1
                                                                                                          17 November 2022

2.0         DESCRIPTION OF EXISTING CONDITIONS
2.1       Geology and Subsurface Conditions
The 1:100,000 scale Gympie Surface Geology Map 1 (Ref. Text Figure 3 below) indicates that the site is
underlain by materials derived of the early to middle Triassic age Kin Kin Beds (green blue shading),
which are described as “strongly cleaved and commonly kinked mudstone with thin siltstone laminae.”




                                                                       Approx. site location




Text Figure 3: Extract of Gympie Surface Geology Map
The investigation comprised drilling of two boreholes (designated BH1 and BH2) from an earthworks building
pad level (already in situ at the time of the fieldwork) and on the natural sloping ground to the east. Borehole
BH1 was taken to a target depth of 4.3 m BGL, and borehole BH2 was terminated at auger drilling refusal in
weathered rock at 4.5 m BGL. The borehole locations are shown indicatively in Text Figure 4.




                                                   Approx. borehole BH2
                                                   location




                                                                                                                 Drill rig at borehole
                                                                                                                 BH1




Text Figure 4: View looking south across building area, showing indicative borehole locations


1
    Dept. of Natural Resources, Mines & Energy, Nambour Surface Geology Map (1:100,000 scale) Sheet 9445, 2018




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