Geotehnical Investigation Report · OPW22/0140

                                   PROPOSED UNIT DEVELOPMENT
                                   37 BOTTLEBRUSH AVENUE, NOOSA HEADS




                                                                                    Crest of ancient
                                                                                    sand dune




                                     Subject Site




Text Figure 6: Plan showing ground surface contours (courtesy Noosa Council ‘Intramaps’)

4.3          Geology
Available geological information 1 indicates that the site is underlain by Pleistocene age dune sand
(Ref: Text Figure 7).




                                                        Approx. Site Location




Text Figure 7: Extract of Gympie Special 1:100,000 Geology Map

4.4          Subsurface Conditions
Detailed descriptions of the subsurface conditions encountered in the boreholes are provided in the
borehole reports attached in Appendix A, along with definition sheets which describe terms and
abbreviations used on the reports. The subsurface conditions encountered in the boreholes are
summarised as follows:

           Pavement (pavers/synthetic matting) – 20 mm to 60 mm thick; then
           Fill – comprising mostly very loose, silty and gravelly sand to between 0.4 m and 1.2 m BGL;
            overlying
           Aeolian Sands – comprising poorly graded sands that were loose to depths of between 1.1 m and
            2.5 m BGL in boreholes BH2 and BH3; then becoming medium dense (from 0.2 m BGL in BH1)
            and increasing to dense below depths of about 3.1 to 4.1 m BGL.



1
    Queensland Government, Department of Mines and Energy, 1:100,000 Gympie Special Geology Map, Sheet 9445 & Part 9545, 1999


13 May 2022
Report No. 22151-001-Rev0                                       5