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

        Table 3 below is our qualitative assessment of landslide risk for the development site. A summary of
        qualitative terminology for use in assessing risk to property is attached (taken from AGS 2007).

        Table 3: Details of Qualitative Risk Assessment for Property (AGS 2007)

          Hazard                 Likelihood       Consequence   Assessed Risk   Comments
                                                                                Given the gentle to moderate natural gradients
          Failure through                                                       through the site, it is considered Unlikely that a
          very loose to                                                         landslide would develop in these materials, subject to
          loose natural                Unlikely    Medium            Low        implementation of the recommendations in Section 6.
          sands above the                                                       It is assessed that there could be a potential Medium
          foundation depth                                                      impact from such instability so the resultant risk would
                                                                                be Low as per AGS 2007.

                                                                                The likelihood of a deep failure through the medium
          Deep failure                                                          dense (or denser) natural sand below the proposed
          through the                                                           foundation depths is assessed as Rare due to the lack
          medium dense (or                                                      of precedence of such movements locally, no signs of
                                        Rare         Major           Low
          denser) sands                                                         any existing slope instability and apparent lack of
          below the                                                             groundwater. Although the consequence of such a
          foundation depth                                                      failure would be Major, the resultant risk is Low as
                                                                                per AGS 2007.

                                                                                The likelihood of a slide/failure through any temporary
                                                                                retention system (sheet pile wall, contiguous pile wall
          Temporary
                                                                                or similar) as outlined in Section 6.4, is assessed as
          instability through
                                                                                Rare, subject to detailed design by a suitable qualified
          temporary
                                        Rare         Major           Low        RPEQ engineer and construction by a specialist
          retention system,
                                                                                contractor which accounts for the required factors of
          as discussed in
                                                                                safety against slope instability. Although the
          Section 6.4.
                                                                                consequence of such a failure would be Major, the
                                                                                resultant risk is Low as per AGS2007.



        The potential impacts on slope stability of the development components have been assessed, and the
        measures recommended below in Section 6 have been designed to mitigate those impacts.




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