RFI -Attachment 6 - Geotechnical Investigation Report CORE

                                            METHOD OF SOIL DESCRIPTION USED ON BOREHOLE AND TEST PIT
                                            REPORTS
                           FILL                                                          CLAY (CL,CI, or CH)

                           GRAVEL (GP or SW)                                             ORGANIC SOILS (OL or OH or Pt)


                           SAND (SP or SW)                                               COBBLES or BOULDERS

                           SILT (ML or MH)

Combinations of these basic symbols may be used to indicate mixed materials such as sandy clay.

CLASSIFICATION AND INFERRED STRATIGRAPHY
Soil and Rock is classified and described in Reports of Boreholes and Test Pits using the preferred method given in AS 1726 - 2017. The material proper-
ties are assessed in the field by visual/tactile methods.

                         PARTICLE SIZE                                                                  PLASTIC PROPERTIES

      Major
                    Sub Division               Particle Size
     Division

               Boulders                          >200 mm

               Cobbles                         63 - 200 mm

      Gravel              Coarse               20 - 63 mm

      Gravel             Medium                6.7 - 20 mm

      Gravel               Fine               2.36 - 6.7 mm

      Sand                Coarse              0.6 - 2.36 mm

      Sand               Medium               0.21 - 0.6 mm

      Sand                 Fine             0.075 - 0.21 mm


                 Silt                    0.002 - 0.075 mm

                Clay                           <0.002 mm

MOISTURE CONDITION FOR COARSE GRAINED SOIL                        AS 1726 - 2017

Symbol             Term                                           Description

D                  Dry                                            Non-cohesive and free running

M                  Moist                                          Soil feels cool, darkened in colour, tends to stick together

W                  Wet                                            Soil feels cool, darkened in colour, soil sticks together, free water forms when handling

MOISTURE CONDITION FOR FINE GRAINED SOIL                          AS1726 - 2017


Symbol             Term                                           Description
W<PL               Moist dry of liquid limit                      Hard and friable or powdery
W = PL             Moist near plastic limit                       Soils can be molded at a moisture condition approximately equal to the plastic limit
W >PL              Moist, wet of plastic limit                    Soils usually weakened and free water forms on hands when handling
W = LL             Wet near plastic limit
W > LL             Wet, wet of liquid limit
CONSISTENCY TERMS FOR                           AS1726—2017           RELATIVE DENSITY OF COARSE GRAINED SOILS                                   AS1726—2017
COHESIVE SOILS
                                                                      Symbol                 Term                      Density Index %           SPT ‘N’ #
Symbol           Term                           Undrained Shear
                                                                      VL                     Very Loose                Less than 15              0 to 4
                                                Strength
                                                                      L                      Loose                     15 to 35                  4 to 10
VS               Very Soft                      0 to 12 kPa

S                Soft                           12 to 25 kPa          MD                     Medium Dense              35 to 65                  10 to 30

F                Firm                           25 to 50 kPa          D                      Dense                     65 to 85                  30 to 50

St               Stiff                          50 to 100 kPa         VD                     Very Dense                Above 85                  Above 50

VSt              Very Stiff                     100 to 200 kPa        In the absence of test results, consistency and density may be assessed from correlations with
                                                                      the observed behaviour of the material.
H                Hard                           Above 200 kPa