Attachment 12 - Geotechnical Investigation Report

                                                                                                                                                                                                                                                                                                                                                                                                                                             Borehole No.

                                                                                                                                                                                                                                                                                                                                                                                                                                               BH10
                                                                                                                                                                                                                                                                                                                                                                                                                                             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:                                  491380.0 m E 7076811.0 m N MGA94 Zone 56                                                                      Checked By:                     ACD
                                                                                                                                                                                                             Drill Model and Mounting:                                      4WD Auger                                                     Inclination: -90°                RL Surface:                106.75 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
                                                                                                                                                                                                                                                                                                                            Silty CLAY (FILL), high plasticity, pale grey, trace
                                                                                                                                                                                                                                                                                                                            of organic material                                                                           Augered to 0.2m
                                                                                                                                                                                                                                                                                                             CH                                                                              St
                                                                                                                                                                                                                                                 BDS                                                                        Silty CLAY, high plasticity, pale brown and grey
                                                                                                                                                                                                                                                 0.25-0.75m                                                                 (Possible ALLUVIUM)



                                                                                                                                                                                                                                                                                                                            becoming red and grey
                                                                                                                                                                                                                                                                             105.8




                                                                                                                                                                                                                                                                                       1
                                                                                                                                                                                                                               Not Encountered
                                                                                                                                                                                                        AD/T




                                                                                                                                                                                                                                                                                                                                                                                     M

                                                                                                                                                                                                                                                                                                                                                                                            VSt
                                                                                                                                                                                                                                                                             104.8




                                                                                                                                                                                                                                                                                       2                                                                                                                                  20/80mm
                                                                                                                                                                                                                                                                                                                                                                                                                          Refusal
TECTONIC 2.00.2 LIB.GLB Log 1 TECTONIC BOREHOLE 19071.GPJ <<DrawingFile>> 17/05/2019 12:04 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




                                                                                                                                                                                                                                                 DS                                                          CH             Gravelly CLAY, high plasticity, pale grey, fine to
                                                                                                                                                                                                                                                 2.25-2.5m                                                                  coarse sized sub-rounded quartz gravel


                                                                                                                                                                                                                                                 DS                                                          CH             Silty CLAY, high plasticity, pale grey (RESIDUAL)
                                                                                                                                                                                                                                                 2.75-3.0m
                                                                                                                                                                                                                                                                             103.8




                                                                                                                                                                                                                                                                                       3
                                                                                                                                                                                                                                                                                                                            Hole Terminated at 3.00 m
                                                                                                                                                                                                                                                                                                                            Target depth
                                                                                                                                                                                                                                                                             102.8




                                                                                                                                                                                                                                                                                       4
                                                                                                                                                                                                                                                                             101.8




                                                                                                                                                                                                                                                                                       5
                                                                                                                                                                                                                                                                             100.8




                                                                                                                                                                                                                                                                                       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