Reference Document - MCU25 0101 (As Published)

 Project No. PG-13872                                                                                                    Page | 5
 August 2025
 Ref: PG-13872, 2025-08-14, GR VER 1
 Stephen & Jane Struss – Geotechnical Investigation - Proposed Residence, 28 Kingfisher Drive, Peregian Beach




TABLE 1                SUBSURFACE PROFILE SUMMARY

                                                                                                     Weakly Cemented
                 Silty Sand                                   Sand
                                                                                                      Indurated Sand
 BH No.          Fill – Very                                                                                             BH TD
                                      Loose/Loose to                Medium Dense/
                    Loose                                                                                  Very Dense
                                      Medium Dense                      Dense
   BH01             0.0-0.4               0.4-2.0                      2.0-6.6                                  6.6-TD    9.0
   HA02             0.0-0.7               0.7-2.2                     2.2-TD (3)                                  NE     2.8 (3)
Notes:
1. All depths in metres below ground level at time of investigation.
2. NE - Not Encountered; TD - Termination Depth.
3. Inferred from DCP testing.

5.0 GROUNDWATER

Groundwater was noted in the boreholes at a depth of 2.6m in BH01 at the time of
drilling in the boreholes. Water levels can be expected to vary with seasonal and
climatic conditions.

6.0 POTENTIAL GROUND SURFACE MOVEMENTS

The investigation and laboratory test results indicate that the development site could
be considered equivalent to Class ‘S’ in accordance with AS 2870-2011 'Residential
Slabs and Footings', following appropriate ground improvement works under the
footings.

It is recommended that the readers satisfy themselves that the use of AS 2870-2011 is
applicable for the proposed design and the above site classification re-confirmed
following the completion of the bulk earthworks operation.

7.0 EARTHWORKS AND SITE PREPARATION CONSIDERATIONS

Earthworks are expected to comprise of cuts ranging from up to 4m in the western
portion of the site, reducing to approximately 2m towards the eastern portion of the
site for the proposed basement. Some over-excavation may be required to allow for
ground improvement works.

It is recommended that the following site preparation and earthworks procedures be
carried out as part of the earthworks procedures during development.

          All earthworks operations should be carried out in general accordance with AS
           3798-2007 "Guidelines on Earthworks for Commercial and Residential
           Developments".
          Trafficability across the site at the time of the investigation was assessed to be
           fair to good with no difficulties encountered at the time of the investigation.
           Following stripping and excavation of the site to the design platform level, the
           exposed sands will be difficult to traffic for conventional vehicles.
           Consideration could be given to adopting a 150mm layer of pavement gravel
           as a working platform across the site.