Appendix B - Geotechnical Assessment · OPW23/0179

 Project No. PG-10375                                                                                       Page | 4
 June 2023
 Ref: PG-10375, 2023-06-09, LTR VER 1
 Michael Cullen – Geotechnical Investigation - Proposed Residence, 128 Gympie Terrace, Noosaville




4.0 GEOTECHNICAL MODEL

The subsurface profile encountered in the boreholes generally consisted of fill to
depths of 0.5m underlain by loose to medium dense sands underlain by indurated
sands. Borehole refusal occurred in the indurated sand layer in both boreholes.

Based on investigations we have done on adjacent sites it is considered likely that the
indurated sands will be underlain by stiff to very stiff clays, however this will need to be
confirmed during construction.

Table 1 presents a summary of the encountered subsurface profile. Detailed borehole
record sheets are appended to this report.

TABLE 1                SUBSURFACE PROFILE SUMMARY

                                                                   NATURAL
                                                                    SAND
    BH No.                  FILL                                                                    BH TD
                                                 Loose/                         Very Dense
                                              Medium Dense                   (Indurated Sand)
     BH01                0.0 – 0.5                  0.5 - 2.5                        2.5 – TD       2.73
     BH02                0.0 – 0.5                 0.5 – 2.85                       2.85 – TD       2.93
Notes:
1. All depths in metres below ground level at time of investigation.
2. TD - Termination Depth.
3. Drilling rig refusal