Att 3 - Landslide Risk Assessment

                                                                                  Job No: 23-458
                                                                                          Page 4


  c                                                     d




Figure 3a, b, c, and d: Photographs of The Existing Site Conditions

1.5 Previous Geotechnical Report

The AW Geotechnics Site Investigation report included drilling four (4) boreholes onsite. In boreholes,
BH1, BH2, and BH3, sandy clay soils that extend down to the termination depths were encountered. In
BH4, however, a ground profile consisting of upper-level silty sand overlying an intermediate zone of
sandy clay, which in turn overlies an extremely weathered rock layer, was recorded.

The investigation assigned a site class of P due to the abnormal moisture condition, the low bearing
capacity and the steep slopes on the site in accordance with AS2780-2011, Clause 1.3.3 (a & c) and
Clause 2.5.3 (a & d).

The report further found that the expected ground surface movement due to moisture changes
corresponds to a design classification of Class H1

1.6 Attachments

The following Appendices are included in this report:

Appendix A – Site Plan of Proposal Development;
Appendix B – Previous Site Investigation Report by AW Geotechnics;
Appendix C – Contour and Detailed Survey by Skyline Surveyors
Appendix D – The Landslide Frequency Assessment Form.




                                                                                            Ref: 4602
                                                                       399 Sunrise Road, Tinbeerwah