Slope Stability Report 26-5-2019 OPW19-0193

                                                                                                                                                                                                                                                                    POINTID:               HA3
                                                                                                                              BOREHOLE LOG
                                                                                                                                                                                                                                                                        SHEET:            1 of 1

CLIENT:                                           Trubuilt                                                                                                                                                        DATE COMMENCED:                                           17-May-19
PROJECT:                                          Slope Risk Assessment Report                                                                                                                                    DATE COMPLETED:                                           17-May-19
LOCATION:                                         91 Ewarts Road, Cooran                                                                                                                                          LOGGED BY:                                                M Grinceri
JOB NUMBER:                                       GAG16011 - LEONTAKIANAKOS                                                                                                                                       CHECKED BY:                                               M Grinceri
CONTRACTOR: GA Geotechnical                                                        HOLE SIZE:                 62mm                              EASTING:           485,016.500 m E                                                                       COLLAR RL:         193.5 m

DRILL MODEL: Dormer Hand Auger                                                     BEARING / INCL:               0°    /    90°                 NORTHING:          7,090,831.700 m E                                                                     DATUM / ZONE: GDA94 / 56J




                                                                                                                                                                                                                  CEMENTING/WEATHERING
                                                                                                                                                                                           CONSISTENCY/STRENGTH
                                                                                                                                                                      MOISTURE CONDITION




                                                                                                                                                                                                                                         PENETROMETER
                                                                                                                                                                                                                                         DYNAMIC CONE

                                                                                                                                                                                                                                         BLOWS/100mm
                        PENETRATION




                                                              GEOLOGICAL UNIT

                                                                                GROUP SYMBOL




                                                                                                                                                                                                                                                                                                           GROUNDWATER
                                                                                               GRAPHIC LOG
                                      ELEVATION
             SUPPORT
METHOD




                                                                                                                                                                                                                                                        SAMPLE
                                                      DEPTH




                       1 2 3                                                                                                                                                                                                             5 10 15
                                                                                                                           MATERIAL DESCRIPTION                                                                                                                                COMMENTS
                                                                                                                                                                                                                                                                                                       0
                                          193.5m    0m                                                       TOPSOIL: CLAY: low plasticity; brown; trace of                                                                                                      0.0m - short grass surrounded by
                                                                                CL




                                                                                                             rootlets (est 5%); flocced / aggregated soil,                                                                                                       weeds and clumps of longer grass




                                                                                                                                                                                           F
                                                                                                                                                                      ~Wp
                                                                                                             possibly as a result of biological activity; cf                                                                                                     at surface
                                                                                                             topsoil
                                                                                                             CLAY: low plasticity; plae brown with orange
                                                                                                             grael particles; with some fine to medium                                                                                                           0.2m - becomes brown mottled
                                                                                                                                                                                                                                                                 red, orange
                                                                                CL




                                                                                                             grained, poorly graded, subangular to




                                                                                                                                                                                           St
                                                                                                             subrounded, highly weathered, low strength



                                                                                                                                                                      <Wp
                                                                                                             phyllite lithic gravel (est 15% to 20%); cf
                                                                                                             colluvium
                                                              COLLUVIUM




                                                                                                             PHYLLITE: fine grained; red - pink to red -
                                                                                                             orange; sericite in distinct foliation; with
                                                                                                             some interbedded clay seams (low plasticity;                                                                                                        Position of phyllite rock at this
                                          193m     0.5m                                                                                                                                                                                                                                            0.5


                                                                                                             red to red - pink), interbeds are 5mm to                                                                                                            position within the soil profile is
                                                                                                             10mm thick (est 45%); cf boulder of                                                                                                                 unusual and does not fit the
                                                                                                                                                                                                                                                                 profile of the lithology, it is
                                                                                                                                                                      M-D

                                                                                                                                                                                           VLS

                                                                                                                                                                                                                  XW


                                                                                                             weathered rock in colluvium
                                                                                                                                                                                                                                                                 therefore assumed that we have
                                                                                                                                                                                                                                                                 drilled through a boulder
                                                                                                                                                                                                                                                                 contained within the colluvium
                                                                                                                                                                                                                                                                 material


                                                                                                             CLAY: low plasticity; pale red to red - orange;
                                                                                                             relic foliation with alignment of sericite in soil;
HAND AUGER




                                                                                                             trace of fine to medium grained, poorly
                                                                                                                                                                                           VSt




                                                                                                             graded, subangular to angular, extremely
             OPEN




                                                                                                             weathered, very low strength phyllite lithic
                                          192.5m    1m                                                       gravel (est 10%); cf residual soil                                                                                                                                                        1
                                                              RESIDUAL SOIL




                                                                                                                                                                      <<Wp
                                                                                CL




                                                                                                                                                                                           St




                                                                                                             PHYLLITE: fine grained; red - orange to red -
                                          192m     1.5m                                                      pink; sericite in distinct foliation; cf Early                                                                                                                                        1.5
                                                                                                                                                                                           VLS

                                                                                                                                                                                                                  XW




                                                                                                             Triassic, Kin Kin Beds
                                                                                                                                                                                                                                                                 1.57m - sudden reduction in DCP
                                                              WEATHERED ROCK




                                                                                                                                                                                                                                                                 penetration
                                                                                                             PHYLLITE: fine grained; red - orange to yellow
                                                                                                             - orange, some variability in colour by layers;                                                                                                     1.66m - 20 for 60mm, DCP refusal
                                                                                                                                                                      D




                                                                                                             sericite in distinct foliation; cf Early Triassic,
                                                                                                             Kin Kin Beds
                                                                                                                                                                                                                  HW
                                                                                                                                                                                           LS




                                                                                                                                                                                                                                                                 1.9m - EOH, auger just grinding
                                                                                                                                                                                                                                                                 away at rock

                                          191.5m    2m                                                                                                                                                                                                                                                 2




BOREHOLE COMMENTS:                                                                                                                                                                                                                                                LOGGING STANDARD: AS1726-2017
Borehole terminated on refusal, backfilled with cuttings, groundwater not encountered.