Appendix G - Geotechnical Report

Total Concept Homes                                                                                 20332-001-Rev0
                                                                                                  15 December 2020

Table 1: Stability Risk Levels
 Risk Level           Example Implications(1)
                      Unacceptable without treatment. Extensive detailed investigation and research, planning
       Very High
 VH                   and implementation of treatment options essential to reduce risk to Low; may be too
       Risk
                      expensive and not practical. Work likely to cost more than value of property.
                      Unacceptable without treatment. Detailed investigation, planning and implementation of
 H     High Risk      treatment options required to reduce risk to Low. Work would cost a substantial sum in
                      relation to the value of the property.
                      May be tolerated in certain circumstances (subject to regulators’ approval) but requires
       Moderate
 M                    investigation, planning and implementation of treatment options to reduce risk to Low.
       Risk
                      Treatment options to reduce to Low risk should be implemented as soon as practicable.
                      Usually acceptable to regulators. Where treatment has been required to reduce the risk
 L     Low Risk
                      to this level, ongoing maintenance required.
       Very Low
 VL                   Acceptable. Manage by normal slope maintenance procedures.
       Risk
 Note: (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.



Considering the existing site conditions (Ref. Section 2), and proposed development works, it is assessed that
there would be a Low (L) Risk of global slope instability affecting the proposed development subject to the
implementation of recommendations given below. Regulators (NC) normally require that a Very Low or Low
Risk of landslide affecting the property must be demonstrated to enable development approval. Summarised
in Table 2 on the page below is our qualitative assessment of landslide risk for the site. A summary of
qualitative terminology for use in assessing risk to property is attached (taken from AGS 2007).




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