Approved Plan - EXE230029

                                                               Site Location




                                       Plate 4: Extract of the Landslide Hazard Overlay Map OM-LS-14B

            Based on our site observations:
                 There were signs of near surface creep of the steeper central portion of the site indicated by leaning
                  trees and trees with curved bases. However, there were no obvious signs of potential deeper slope
                  instability such as tension cracks in the slope surfaces.
                 There were no obvious signs of retaining wall instability such as tension cracks behind the wall crests,
                  bulging faces etc although our observations were limited by the overgrown nature of some areas of the
                  site. However, we have assumed that the retaining walls within the site were engineer designed.

            We have no information regarding the placement of the fill on the site and as such it has been assessed as
            being ‘uncontrolled’ as defined in AS2870-2011. As noted in Section 4.2 above we also assessed the fill to be
            poorly compacted based on the DCP test results.



            5.2     Risk Assessment

            5.2.1 Potential Geotechnical Hazards
            Based on our site observations, assessment of existing conditions provided above, and the form of the
            proposed residence, we consider that the potential geotechnical hazards for the site, may be summarised as
            follows:
            1. Deep seated instability.
            2. Slow moving near surface creep of the steeper section of the site.
            3. Instability of existing retaining walls.
            4. Instability of temporary excavation batters.
            5. Instability of new retaining walls.

            It is important to be mindful that slope instability can occur at any time and it would be difficult or impossible
            to predict when the identified potential hazards will occur. Also, we cannot predict when an extreme or
            unusual event may occur (such as an earthquake or 1 in 100 year rainfall event etc) and what impact it would
            have on the stability of the identified potential hazards described above.


            35891URrpt Rev1                                       6
Document Set ID: 22532435
Version: 1, Version Date: 07/08/2023