Geotechnical Investigation

                                 PROPOSED CALILE HOTEL NOOSA DEVELOPMENT
                                 3 – 7 SERENITY CLOSE, NOOSA HEADS


                                                      Very Loose/              Medium Dense           Dense (or denser)
   Borehole No.                   Fill
                                                      Loose Sands                 Sands                    Sands

         BH9                       NE                    0.0 – 1.2                 1.2 – 3.2            3.2 – 4.6*DCP

        BH10                       0.7                      NE                     0.7 – 3.7             3.7 – 6.0TD
Notes: 1.         Depths noted in m BGL at time of investigation (21 June 2021)
       2.         NE denotes not encountered
       3.         TD denotes borehole terminated at target depth

       4.         * inferred from DCP testing
       5.         DCP denotes DCP termination depth




4.5         Geotechnical Laboratory Test Results
PSD analyses of two samples from boreholes BH1 and BH5 indicate that the soils generally comprised
poorly graded fine to medium grained sands. Full test results (laboratory certificates) are presented in
Appendix B.

4.6         Groundwater
No signs of groundwater seepage (‘springs’) were observed during our walk-over. Groundwater was not
encountered in the boreholes at the time of investigation. Groundwater conditions are expected to be
reflective of prevailing weather conditions and seepage may develop, particularly following periods of
prolonged or heavy rainfall.

4.7         Surface Drainage
Surface drainage would be expected to follow natural surface contours in a southerly direction, towards
lower lying ground and ultimately a watercourse to the south. Most runoff from upslope of the property is
anticipated to be intercepted by the existing stormwater infrastructure along Serenity Close.

Given the sandy nature of the site, rainfall would normally be anticipated to infiltrate the ground surface.
However, as the proposed development will occupy a large part of the block, significant run-off from hard
surfaces will occur. Nevertheless, where directed into swales rather than pipes, such run-off would be
expected to infiltrate into the natural sands relatively rapidly. Some erosion scours were observed along the
gravel tracks in the south-eastern part of the site (Ref. Text Figure 9 overleaf) which indicates that
concentrated stormwater runoff develops in these areas. It is inferred that the concentrated runoff in these
areas is due to anthropogenic activities, rather the natural surface features. No significant erosion features
were noted across inferred natural ground slopes during our assessment. Recommendations to improve
surface drainage as part of the development works are provided in Section 6.5.




Text Figure 9: Erosion scours parallel to the gravel tracks in the south-eastern corner of the site



7 October 2022
Report No. 22239-001-Rev0                                     7