Attachment C - Soil Survey Report · MCU18/0013

                                     TABLE OF CONTENTS
1.0     INTRODUCTION .............................................................................................. 1
 1.1      General .................................................................................................................. 1
 1.2      Reason for this Report ......................................................................................... 1
 1.3      Scope of Report .................................................................................................... 1
 1.4      Controls and Procedures ..................................................................................... 1
 1.5      Proposed Development ........................................................................................ 1
 1.6      Provided Information ............................................................................................ 2
2.0     ASSESSMENT METHODOLOGY ................................................................... 3
 2.1      Method ................................................................................................................... 3
 2.2      Hazard & Risk Analysis ........................................................................................ 3
3.0     SITE ASSESSMENT AND DATA COLLECTION ............................................ 4
 3.1      Field Investigation ................................................................................................ 4
 3.2      Site Location ......................................................................................................... 4
 3.3      Regional Geology ................................................................................................. 5
 3.4      Published Stability Data ....................................................................................... 5
 3.5      Site Factors ........................................................................................................... 5
 3.6      Geotechnical Model .............................................................................................. 6
      3.6.1     Subsurface Profile ........................................................................................................... 6
      3.6.2     Groundwater and Seepage ............................................................................................. 7
      3.6.3     Laboratory Testing .......................................................................................................... 7
 3.7      Evidence of Possible Instability........................................................................... 7
4.0     HAZARD IDENTIFICATION ............................................................................. 9
 4.1      General Discussion On Stability Assessment .................................................... 9
 4.2      Typical Hazards .................................................................................................... 9
5.0     RISK ASSESSMENT ..................................................................................... 10
 5.1      General ................................................................................................................ 10
 5.2      Review of Stability Data...................................................................................... 10
 5.3      Identification of Potential Hazards on Site ........................................................ 10
 5.4      Likelihood Estimation ......................................................................................... 10
      5.4.1     Methods of Assessment ................................................................................................ 10
      5.4.2     Evaluation of Likelihood Rating for Existing Overall Site .............................................. 10
      5.4.3     Hazard A - Natural Shallow Landslide .......................................................................... 11
      5.4.4     Hazard B - Proposed Cuts ............................................................................................ 11
      5.4.5     Hazard C - Scour of Exposed Surfaces ........................................................................ 12
 5.5      Consequence Analysis ....................................................................................... 12
      5.5.1     General .......................................................................................................................... 12
      5.5.2     Site Factors ................................................................................................................... 12
      5.5.3     Consequence to Property ............................................................................................. 13
      5.5.4     Consequence to Persons .............................................................................................. 13
 5.6      Risk Determination and Evaluation - Property.................................................. 13
 5.7      Risk Determination and Evaluation - Persons .................................................. 14
 5.8      Risk Summary ..................................................................................................... 15
6.0     ENGINEERING STABILITY RECOMMENDATIONS..................................... 16
 6.1      General Recommendations with Respect to Construction .............................. 16
 6.2      Stormwater Drainage .......................................................................................... 16
 6.3      Site Specific Recommendations ........................................................................ 17
      6.3.1     General .......................................................................................................................... 17
      6.3.2     Scour ............................................................................................................................. 17
      6.3.3     Retaining Structures ...................................................................................................... 17
      6.3.4     Continued Maintenance ................................................................................................ 17
7.0     ENGINEERING ASSESSMENT ..................................................................... 18
 7.1      Civil Works .......................................................................................................... 18
      7.1.1     Trafficability and Site Preparation ................................................................................. 18
      7.1.2     Earthworks .................................................................................................................... 18
      7.1.3     Batters ........................................................................................................................... 19
 7.2      Building Foundations ......................................................................................... 19