Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                                           Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                                             BH12
                                                                                                                                                                                                                                                                                                                                                                                                                                                           Page 1 of 1

                                                                                                                                                                                                        Engineering Log - Borehole                                                                                                                                                      Project No.:                    19071

                                                                                                                                                                                                             Client:                                                      Ruby Developments                                                                                             Commenced:                      10/04/2019
                                                                                                                                                                                                             Project Name:                                                Proposed Retirement Complex                                                                                   Completed:                      10/04/2019
                                                                                                                                                                                                             Hole Location:                                               Lot 2 & Lot 3 Myall Street, Cooroy                                                                            Logged By:                      BZ
                                                                                                                                                                                                             Hole Position:                                               491497.0 m E 7076603.0 m N MGA94 Zone 56                                                                      Checked By:                     ACD
                                                                                                                                                                                                             Drill Model and Mounting:                                                   4WD Auger                                                     Inclination: -90°                RL Surface:                112.75 m
                                                                                                                                                                                                             Hole Diameter:                                                              100 mm                                                        Bearing:     360°                Datum:                     AHD             Operator:          Ground Drill

                                                                                                                                                                                                                               Drilling Information                                                                                                            Soil Description                                                                    Observations




                                                                                                                                                                                                                                                                                                                                                                                                Relative Density
                                                                                                                                                                                                                                                                                                                        Classification
                                                                                                                                                                                                                                                                                                                                                                                                                      Pocket                          DCP TEST
                                                                                                                                                                                                                 Penetration




                                                                                                                                                                                                                                                                                                                                                                                                Consistency
                                                                                                                                                                                                                                                                                                          Graphic Log


                                                                                                                                                                                                                                                                 Samples                                                                                 Material Description                                                                    (AS 1289.6.3.2-1997)
                                                                                                                                                                                                                                                                                                                                                                                                                   Penetrometer
                                                                                                                                                                                                                                                                              Recovery




                                                                                                                                                                                                                                                                                                                                                                                                Condition
                                                                                                                                                                                                                                                                  Tests                                                                    soil type: plasticity or particle characteristics,




                                                                                                                                                                                                                                                                                                                                                                                                Moisture
                                                                                                                                                                                                                                                                                                                                                                                                                       UCS                        Blows per 100 mm
                                                                                                                                                                                                                                                                                                                        Symbol
                                                                                                                                                                                                        Method




                                                                                                                                                                                                                                                                 Remarks                                                                    secondary and minor components, colour
                                                                                                                                                                                                                               Water




                                                                                                                                                                                                                                                                                          RL      Depth                                                                                                               (kPa)
                                                                                                                                                                                                                                                                                          (m)      (m)                                                                                                                             0        5        10     15       20   25




                                                                                                                                                                                                                                                                                                                                                                                                                   100
                                                                                                                                                                                                                                                                                                                                                                                                                   200
                                                                                                                                                                                                                                                                                                                                                                                                                   300
                                                                                                                                                                                                                                                                                                                                                                                                                   400
                                                                                                                                                                                                                                                                                                                                                                                                                   500
                                                                                                                                                                                                                                                                                                                          CH             Silty CLAY (TOPSOIL), high plasticity, grey and                                               HW
                                                                                                                                                                                                                                                                                                                                                                                                           F                           HW
                                                                                                                                                                                                                                                                                                                                         brown, with organic
                                                                                                                                                                                                                                                                                                                                                                                                  M                                    HW
                                                                                                                                                                                                                                                              BDS                                                         CH             Silty CLAY, high plasticity, brown, trace of fine                                             HW
                                                                                                                                                                                                                                                              0.25-0.75m                                                                                                                                  St
                                                                                                                                                                                                                                                                                                                                         grained sand                                                                                  HW
                                                                                                                                                                                                                                                              U50                                                                        (RESIDUAL)
                                                                                                                                                                                                                                                              0.5-0.7m                                                                                                                            W

                                                                                                                                                                                                                                                                                                                                         becoming red and orange, without sand
                                                                                                                                                                                                                               Groundwater seepage at 0.75m




                                                                                                                                                                                                                                                                                          111.8




                                                                                                                                                                                                                                                                                                    1
                                                                                                                                                                                                                                                              DS
                                                                                                                                                                                                                                                              1.0-1.25m
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                                                                                                                                         VSt
                                                                                                                                                                                                                                                                                                                                                                                                  M
                                                                                                                                                                                                                                                                                                                                         becoming pale grey and red
                                                                                                                                                                                                                                                                                          110.8




                                                                                                                                                                                                                                                                                                    2
                                                                                                                                                                                                                                                              DS
                                                                                                                                                                                                                                                              2.0-2.5m
TECTONIC 2.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 19071.GPJ <<DrawingFile>> 17/05/2019 12:05 10.0.000 Datgel Lab and In Situ Tool - DGD | Lib: Tectonic 2.00.2 2016-10-13 Prj: Tectonic 2.00 2016-02-16




                                                                                                                                                                                                                                                                                                                                                                                                                                       20/75mm
                                                                                                                                                                                                                                                                                                                                                                                                                                       Refusal


                                                                                                                                                                                                                                                                                                                                                                                                  D
                                                                                                                                                                                                                                                                                                                                                                                                           H
                                                                                                                                                                                                                                                                                          109.8




                                                                                                                                                                                                                                                                                                    3
                                                                                                                                                                                                                                                                                                                                         Hole Terminated at 3.00 m
                                                                                                                                                                                                                                                                                                                                         Target depth
                                                                                                                                                                                                                                                                                          108.8




                                                                                                                                                                                                                                                                                                    4
                                                                                                                                                                                                                                                                                          107.8




                                                                                                                                                                                                                                                                                                    5
                                                                                                                                                                                                                                                                                          106.8




                                                                                                                                                                                                                                                                                                    6




                                                                                                                                                                                                                  Method                                                     Penetration                                    Water                              Samples and Tests                            Moisture Condition                  Consistency/Relative Density
                                                                                                                                                                                                             AD/T-Auger Drilling TC Bit                                        No resistance                            Level (Date)                    U - Undisturbed Sample                                  D - Dry                            VS - Very Soft
                                                                                                                                                                                                             RR - Rock Roller                                                   ranging to                                                              D - Disturbed Sample                                    M - Moist                          S - Soft
                                                                                                                                                                                                             RD - Rotary Drilling                                                 refusal                               Inflow                          SPT - Standard Penetration Test                         W - Wet                            F    - Firm
                                                                                                                                                                                                             NMLC -Rock Core                                                                                            Partial Loss                                                                                                               VSt - Very Stiff
                                                                                                                                                                                                             HA - Hand Auger                                                                                            Complete Loss                                                                                                              H - Hard
                                                                                                                                                                                                                                                                                                                                                                                                                   Plastic Limit                   VL - Very Loose
                                                                                                                                                                                                                                                                                          Graphic Log/Core Loss                                                                                                                                    L    - Loose
                                                                                                                                                                                                                                                                                                                                                             Classification Symbols and                               < PL                         MD - Medium Dense
                                                                                                                                                                                                                                                                                             Core recovered (hatching                                             Soil Descriptions
                                                                                                                                                                                                                                                                                             indicates material)                                                                                                      = PL                         D - Dense
                                                                                                                                                                                                                                                                                                                                                                Based on Unified Soil                                 < PL                         VD - Very Dense
                                                                                                                                                                                                                                                                                             Core loss
                                                                                                                                                                                                                                                                                                                                                                Classification System