Reference Document - MCU26 0001 & OPW26 0002 - AS PUBLISHED · MCU26/0001

        3.              Method of Investigation
        As part of our assessment, a desk-top study was carried out comprising a review of published geological
        maps and slope stability studies, as well as Noosa Council (NC) planning overlays and site information.
        An experienced engineering geologist from Tectonic undertook a site walk-over on 19 January 2025 to
        visually assess any indicators of past slope instability. The walk-over included assessment of soil
        exposures, surface drainage conditions, topography, evidence of erosion or past instability, and
        vegetation.
        The walk-over was followed by a subsurface investigation comprising the drilling of two hand augered
        boreholes (designated BH1 and BH2) to depths of up to 4 m below ground level (BGL) and one
        standalone DCP test (DCP3), in accessible areas across the site.
        In-situ testing, using the DCP method, was carried out from the ground surface and at selected depths
        within each borehole. DCP testing was extended below the base of the hand augered boreholes to
        depths of up to 4.8 m BGL. Boreholes were backfilled on completion using drilling spoil, with excess
        material slightly mounded at surface.
        Laboratory classification testing was not warranted due to the sandy nature of the subsurface conditions
        encountered.
        Borehole locations are shown in Figure 1 attached at the end of this report, with borehole and DCP logs
        presented in Appendix A, together with explanatory notes. Subsurface conditions are discussed in
        Section 4.4. Borehole coordinates were recorded using a handheld global positioning system (GPS).
        The results of the desk-top study and walk-over survey are included in Section 4.




        Geotechnical Investigation
        30 January 2026 | 25408-001-Rev0                                                                          2
Document Set ID: 25158026
                  24528612
Version: 1,
         2, Version Date: 10/09/2026
                          13/02/2026