REFERENCED Document Slope Stability Assessment MCU13/0151

                                                                                                              Report No. 13N 682




4.       ASSESSMENT OF EXISTING SLOPE CONDITION


This site has not been classified under the Sunshine Coast Council (SCC) Landslip Hazard
mapping.

While this mapping would generally provide an indication of the potential for slope instability in the
area it should be understood that this site specific investigation will provide more relevant data for
the purposes of this assessment.

         4.1       Slope Stability Assessment

To adequately assess the potential risk of slope instability at the site, it is necessary to quantify
levels of risk and determine their potential implications for the proposed development. The AGS
2007 “Practice Note Guidelines for Risk Management” define these levels according to the table
below.
Table 3 – Risk Level Implications
             RISK LEVEL                                             EXAMPLE IMPLICATIONS (1)
                                               Unacceptable without treatment. Extensive detailed investigations and research,
                                               planning and implementation of treatment options essential to reduce risk to Low;
 VH          VERY HIGH RISK                    may be too expensive and not practical. Work likely to cost more than value of the
                                               property.
                                               Unacceptable without treatment. Detailed investigation, planning and
 H               HIGH RISK                     implementation of treatment options required to reduce risk to Low. Would cost a
                                               substantial sum in relation to the value of the property.
                                               May be tolerated in certain circumstances (subject to regulator's approval) but
                                               requires investigation, planning and implementation of treatment options top
 M           MODERATE RISK                     reduce the risk to Low. Treatment options to reduce to Low risk should be
                                               implemented as soon as practicable.
                                               Usually acceptable to regulator's. Where treatment has been required to reduce
  L               LOW RISK                     the risk to this level, ongoing maintenance is required.


 VL            VERY LOW RISK                   Acceptable. Manage by normal slope maintenance procedures.

(1)
 The implications for a particular situation are to be determined by all parties to the risk assessment and may depend on the
nature of the property at risk; these are only given as a general guide.


By considering the existing site conditions outlined in Section 2 and assuming implementation of
the geotechnical recommendations for construction detailed in Section 3 we can provide the
following qualitative assessment of risk of potential landslip for the proposed development.




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