REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    •     Photographic lithological recording, and
                    •     Sequentially backfilling the test pits in the general reverse order of excavation, to minimise deeper
                          burial of any encountered waste materials.

        6.2.3.      SOIL LABORATORY ANALYSIS
                    SAQP Section 9.2.3 identified the PCOC and proposed allowances for NATA laboratory analysis of
                    selected soil samples for the DSI, which is reconciled in Table 11 below.
                    Table 11: DSI soil sample allowances vs actual laboratory analysis
                                                        DSI SAQP                  All soil or fill samples (PSI, DSI and
                                                        allowance    DSI Actual   soil screening trial)
                        Analyte                                      (primary
                                                        (primary     and QA)      Primary      Duplicates         Triplicates
                                                        and QA)
                        Heavy Metals                    173          174          176          15                 8
                        Chromium speciation             5            3            3            -                  -
                        TRH/BTEXN                       69           85           88           8                  4
                        asbestos bulk (ACM)             46           5            5            -                  -
                        asbestos in soil (AF/FA)        35           29           39           -                  -
                        OCP/OPP                         35           34           35           3                  2
                        PAH                             35           34           30           3                  2
                        PCB                             35           34           30           3                  2
                        SVOC                            23           24           22           2                  -
                        PFAS                            23           23           20           2                  1
                    The above table excludes various ASLP and TCLP leachates analysis.


        6.3.        GROUNDWATER SAMPLING

        6.3.1.      RATIONALE AND MONITORING BORE LOCATIONS
                    The site setting review indicated the site is not mapped as a potential Groundwater Dependant
                    Ecosystem (GDE) with an absence of any higher value ecological receptors on or near the site, however,
                    human health is of concern from any site derived contamination due to the presence of 26 registered
                    groundwater bores and potential for surface expression within a 2000m radius.
                    The closest registered groundwater bore RN185193 located approximately 184m south-east has a
                    recorded groundwater aquifer from 24 to 27mbgl in shale and quartz formations, with permanent
                    groundwater therefore likely to be present between 25 to 30 metres below ground level (mbgl).
                    Note that the actual groundwater levels during monsoonal conditions were much shallower over the
                    northern portion of the site within the Kin Kin mudstone formation, with groundwater not encountered over
                    the southern portion of the site within the Myrtle Creek sandstone formation.
                    Groundwater would be expected to generally flow in a direction sympathetic to the natural topography,
                    being anywhere from the north-north-east in an arc around to the east-south-east. Actual groundwater
                    flow direction may vary subject to various site and regional hydrogeologic conditions.



        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                                  Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                        39                        Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900