REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    •    TP40-0.1 - copper, lead and nickel (underlying 0.5 sample below SAC)
                    •    TP42-0.2 – metals (zinc) (underlying 1.0 sample below SAC)

                    •    TP43-0.1 – metals (zinc) (underlying 0.3 sample below SAC)
                    •    TP45-0.1 – metals (lead) (underlying 0.5 sample below SAC)

                    •    TP46-0.2 – metals (zinc) (underlying 0.5 sample below SAC)
                    •    TP47-0.2 – metals (copper and zinc) (underlying 0.5 sample below SAC)
                    •    TP48-0.2 – metals (nickel and zinc) (underlying sample also impacted – see below)

                    •    TP48-0.5 - metals (zinc)

                    •    TP49-0.2 – metals (zinc) (underlying 1.0 sample below SAC)

                    •    TP54-0.1 – metals (zinc) (underlying 0.5 sample below SAC)
                    •    TP55-0.1 - ACM
                    •    TP58-0.1 – metals (zinc) (underlying 0.5 sample below SAC)
                    •    TP68 – metals (zinc) (to at least 0.4mbgl)

                    •    TP75 - metals (lead, nickel and zinc) (underlying 1.0 sample below SAC for lead and nickel but not for
                         zinc).


                    The highest recorded heavy metal total concentrations are as follows:

                    •    Arsenic highest result of 35mg/kg in sample TP10-0.5 that was below SAC.
                    •    Cadmium highest result of 12mg/kg in TP10-0.5, then 6mg/kg in TP75-0.3 that are both below SAC.
                    •    Chromium highest result of 132mg/kg in TP10-0.5, which was speciated as Chromium III and
                         therefore below SAC.

                    •    Copper highest results were 9,940mg/kg in TP40-0.1, then 1,710mg/kg (TP10-0.5), 199mg/kg (TP75-
                         0.3), 115mg/kg (TP47-0.2) and 108mg/kg (TP75-0.1) as well as a few other locations with lower
                         concentrations but where the ecological SAC was exceeded as noted above. There were no
                         exceedances of human health SAC for copper.

                    •    Lead highest results were 1,960mg/kg (TP10-0.5) that exceeded EIL and HIL D SAC, then
                         1,040mg/kg (TP75-0.3) and 929mg/kg (TP75-0.1) that exceeded HIL C SAC, then 465mg/kg (TP9-
                         0.1), 457mg/kg (TP38-0.1), 437mg/kg (TP45-0.1) and 401mg/kg (TP40-0.1) with all these samples
                         exceeding HIL A SAC.

                    •    Nickel highest results were 68mg/kg (TP10-5) then 32mg/kg (TP75-0.3), 31mg/kg (TP40-0.1),
                         29mg/kg (TP9-0.1), 16mg/kg (TP75-0.1) and 9mg/kg (TP48-0.2) that all exceeded ecological but not
                         human health SAC.

                    •    Zinc highest results were 3,650mg/kg (TP75-0.3) then 2,500mg/kg (TP10-0.5), 1,930mg/kg (TP75-
                         0.1), 992mg/kg (TP40-0.1), 629mg/kg (TP9-0.1), 618mg/kg (TP47-0.2), 596mg/kg (TP68-0.1),
                         581mg/kg (TP48-0.2), 451mg/kg (TP75-1.0), 389mg/kg (TP54-0.1), 333mg/kg (TP58-0.1), 313mg/kg
                         (TP49-0.2), 310mg/kg (TP21-0.1), 293mg/kg (TP46-0.2), 286mg/kg (TP10-0.1), 282mg/kg (TP38-
                         0.1), 265mg/kg (TP48-0.5), 250mg/kg (TP7-0.1), 236mg/kg (TP11-0.1), 213mg/kg (TP68-0.4),



        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                              Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                    69                        Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900