Appendix B - Geotechnical Investigation Report

                                                      LOG SYMBOLS
 Log Column                 Symbol          Definition

 Groundwater Record                         Standing water level. Time delay following completion of drilling/excavation may be shown.

                                            Extent of borehole/test pit collapse shortly after drilling/excavation.
                                 C
                                            Groundwater seepage into borehole or test pit noted during drilling or excavation.

 Samples                          ES        Sample taken over depth indicated, for environmental analysis.
                                 U50        Undisturbed 50mm diameter tube sample taken over depth indicated.
                                 DB         Bulk disturbed sample taken over depth indicated.
                                 DS         Small disturbed bag sample taken over depth indicated.
                                 ASB        Soil sample taken over depth indicated, for asbestos analysis.
                                 ASS        Soil sample taken over depth indicated, for acid sulfate soil analysis.
                                 SAL        Soil sample taken over depth indicated, for salinity analysis.
 Field Tests                 N = 17         Standard Penetration Test (SPT) performed between depths indicated by lines. Individual
                             4, 7, 10       figures show blows per 150mm penetration. ‘Refusal’ refers to apparent hammer refusal within
                                            the corresponding 150mm depth increment.
                          Nc =          5   Solid Cone Penetration Test (SCPT) performed between depths indicated by lines. Individual
                                        7   figures show blows per 150mm penetration for 60 solid cone driven by SPT hammer. ‘R’ refers
                                            to apparent hammer refusal within the corresponding 150mm depth increment.
                                       3R

                            VNS = 25        Vane shear reading in kPa of undrained shear strength.
                            PID = 100       Photoionisation detector reading in ppm (soil sample headspace test).

 Moisture Condition          w > PL         Moisture content estimated to be greater than plastic limit.
 (Fine Grained Soils)        w  PL         Moisture content estimated to be approximately equal to plastic limit.
                             w < PL         Moisture content estimated to be less than plastic limit.
                             w  LL         Moisture content estimated to be near liquid limit.
                             w > LL         Moisture content estimated to be wet of liquid limit.
 (Coarse Grained Soils)          D          DRY   – runs freely through fingers.
                                 M          MOIST – does not run freely but no free water visible on soil surface.
                                 W          WET   – free water visible on soil surface.

 Strength (Consistency)           VS        VERY SOFT         – unconfined compressive strength  25kPa.
 Cohesive Soils                    S        SOFT              – unconfined compressive strength > 25kPa and  50kPa.
                                   F        FIRM         – unconfined compressive strength > 50kPa and  100kPa.
                                  St        STIFF        – unconfined compressive strength > 100kPa and  200kPa.
                                 VSt        VERY STIFF   – unconfined compressive strength > 200kPa and  400kPa.
                                 Hd         HARD         – unconfined compressive strength > 400kPa.
                                  Fr        FRIABLE      – strength not attainable, soil crumbles.
                                 ( )        Bracketed symbol indicates estimated consistency based on tactile examination or other
                                            assessment.

 Density Index/                                                         Density Index (ID)           SPT ‘N’ Value Range
 Relative Density                                                       Range (%)                    (Blows/300mm)
 (Cohesionless Soils)             VL        VERY LOOSE                     15                               0–4
                                   L        LOOSE                       > 15 and  35                   4 – 10
                                 MD         MEDIUM DENSE                > 35 and  65                  10 – 30
                                  D         DENSE                       > 65 and  85                  30 – 50
                                 VD         VERY DENSE                  > 85                           > 50
                                 ( )        Bracketed symbol indicates estimated density based on ease of drilling or other assessment.

 Hand Penetrometer               300        Measures reading in kPa of unconfined compressive strength. Numbers indicate individual
 Readings                        250        test results on representative undisturbed material unless noted otherwise.

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