Appendix B - Geotechnical Investigation Report

3     ASSESSMENT PROCEDURE
This stability assessment is based upon:
     A detailed inspection of the topographic, surface drainage and geological conditions of the site and its
      immediate environs which was completed by our Principal Associate engineering geologist on
      15 March 2023. These features were compared to those of other similar lots in neighbouring locations
      to provide a comparative basis for assessing the risk of instability affecting the proposed development.
      The attached Appendix A defines the terminology adopted for the risk assessment together with a
      flowchart illustrating the Risk Management Process based on the guidelines given in AGS 2007c
      (Reference 1).
     A review of the subsurface conditions presented in the ASI “Soil Test Report” which was separately
      commissioned by Nick Cusack.

The attached Figure 2 presents a geotechnical site plan showing the principal geotechnical features present
at the site and is based on the provided survey plan with the approximate outline of the proposed Ground
Floor level superimposed. Additional features on Figure 2 have been measured by hand held clinometer and
tape measure techniques and hence are only approximate. Should any of the features be critical to the
proposed development, we recommend they be located more accurately using instrument survey
techniques. Figure 3 presents an explanation of the geotechnical mapping symbols used on Figure 2.



4     DESCRIPTION OF EXISTING CONDITIONS

4.1     Geology
The 1:100,000 Gympie Special geological map (First Edition 1999) prepared by the Queensland Department
of Mines and Energy indicates that the site is underlain by Late Triassic – Jurassic age Myrtle Creek Sandstone;
(see Plate 1).
                                          Approximate Site Location




                               Plate 1: Extract of Gympie Special geology map




35891URrpt Rev1                                    2