Compiled Reference Documents - MCU24/0153 & OPW24/0202

        Table 3: Details of Qualitative Risk Assessment for Property (AGS 2007)
                                                                      Assessed
          Hazard                           Likelihood   Consequence
                                                                      Risk
                                                                                 Comments
          Failure through very loose to    Unlikely     Medium        Low        Given the low to moderate natural gradients through the
          loose natural sands above the                                          proposed building area, it is considered Unlikely that a
          foundation depth                                                       landslip would develop in these materials, subject to
                                                                                 implementation of the recommendations in Section 4.
                                                                                 Given a potential Medium impact from such instability
                                                                                 the resultant risk would be Low as per AGS 2007.

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

          Temporary instability through    Rare         Major         Low        The likelihood of a slip/failure through any temporary
          temporary retention system, as                                         retention system (sheet pile wall, contiguous pile wall or
          discussed in Section 6.4.                                              similar) as outlined in Section 6.4, is assessed as Rare,
                                                                                 subject to detailed design by a suitable qualified RPEQ
                                                                                 engineer and construction by a specialist contractor
                                                                                 which accounts for the required factors of safety against
                                                                                 slope instability. Although the 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 4 have been designed to mitigate those impacts.




        Proposed Unit Development
        30 September 2024 | 24265-001-Rev0                                                                                                    10
Document Set ID: 23376055
Version: 1, Version Date: 28/11/2024