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

        4.5             Groundwater
        No signs of groundwater seepage (‘springs’) were observed during our walk-over. Groundwater was not
        encountered in the boreholes at the time of investigation.
        Groundwater conditions are expected to be reflective of prevailing weather conditions and seepage may
        develop, particularly following periods of prolonged or heavy rainfall.


        4.6             Surface Drainage
        Surface drainage would be expected to follow natural surface contours to the south-west towards
        Bottlebrush Avenue, thus draining into the roadside drainage system. It is noted that the site has
        relatively large catchment; however, most runoff from upslope of the property is anticipated to be
        intercepted by the existing stormwater infrastructure from the neighbouring structures and streets to the
        north-east.
        Given the sandy nature of the site, rainfall would normally be anticipated to infiltrate the ground surface.
        However, as the proposed development will occupy a large part of the block, significant run-off from
        hard surfaces will occur. Nevertheless, where directed into swales rather than pipes, such run-off would
        be expected to infiltrate into the natural sands relatively rapidly.
        No significant surface run-off features were noted during our assessment (e.g. deep rilling or scour/wash
        out scars). This indicates that significant overland flow is generally absent during rainfall events.




        Geotechnical Investigation
        30 January 2026 | 25408-001-Rev0                                                                           7
Document Set ID: 25158026
                  24528612
Version: 1,
         2, Version Date: 10/09/2026
                          13/02/2026