Response to Information Request - MCU12/0184

                   APPENDIX D                         -
                                                          Details of Qualitative Risk Assessment for Property (AGS2007).
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                                                                                                                                                      The likelihood of Unlikely is assessed for the potentiallandsliding or creep movement of the residual material.

                                                                                                                                                      Consequences of Medium are assessed as the failure of these soils could potentially cause some structural
I       1: Shallow failure in the

        footing zone of the future                                        Unlikely              Medium                Low                Low
                                                                                                                                                      damage to the structure. The assessed risk for the site in the current condition is thus Low as per AGS 2007.
                                                                                                                                                      The assessed risk would remain Low if fill material used on the site is benched into all slopes and is placed,
        structure
                                                                                                                                                      treated and compacted in accordance with AS3798-2007 "Guidelines on Earthworks for Commercial and
                                                                                                                                                      Residential Developments".


                                                                                                                                                      The likelihood of Rare is assessed for the potentiallandsliding or creep movement of through the weathered rock
        2: Deep failure through the
                                                                                                                                                      material below the proposed structures. Consequences of Medium are assessed as the failure of these soils
        weathered rock below the                                           Rare                 Medium                Low                Low
                                                                                                                                                      could potentially cause structural damage to some of the property. The assessed risk for the site in the current
        future structure
                                                                                                                                                      condition is thus Low as per AGS 2007.


                                                                    Possible (Unlikely if                                                             Assuming that all retaining structures would be designed appropriately, in accordance with Section 7.8, and with
        3: Failure of engineered                                       appropriately                                                                  appropriate drainage, designed drainage by a professional engineer, the likelihood of failure was assessed to be
        retaining structures or cut and                                 designed by         Minor to Medium         Moderate             Low          Unlikely. Consequences of engineered retaining structures or batters failing would be Minor to Medium. The
        fill batters on the site.                                       professional                                                                  assessed risk is Low providing retaining walls and batters are designed by a suitably qualified engineer as

                                                                         engineer)                                                                    outlined in this report and that all mitigation recommendations for batters are followed.




                   Coffey Geotechnics
                   GEOTKPAR01945AAlA

                   19April2013