REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    As all organic BTEXN analysis results were less than the laboratory Limit Of Reporting (LOR) this
                    duplicate set is considered to have an RPD of 0 and therefore acceptable.
                    Calculation of RPD’s for the above two PSI duplicate sets with heavy metals and TRH analysis are
                    tabulated below.
                    Table QA4 PSI FIELD DUPLICATES/TRIPLICATES RELATIVE PERCENTAGE DIFFERENCES




                    For the PSI one inorganic RPD exceeded the goal of <30% RPD, with all results below SAC and most at
                    or near LOR. The elevated RPD is attributed to minor heterogeneity within the material sampled and is
                    considered acceptable.
                    For the DSI, two inorganic RPD’s exceeded the goal of <50% RPD, however, with one at LOR and the
                    other near LOR this is considered acceptable.
                    Of the 152 inorganic duplicate or triplicate RPD’s, 37 exceeded the goal of <30% RPD of which 14
                    (including the highest recorded RPD’s) had one result at LOR and the other near LOR. The remaining
                    results are attributed to the heterogeneity of the material sampled and are considered acceptable.
                    I1.5 CONCLUSION
                    Based on the quality assurance measures and review undertaken, the quality of the analytical data
                    produced is considered acceptable for interpretive use within this investigation report.




        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                            Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                 97                         Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900