REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    I1.2 DATA QUALITY SUMMARY
                    A summary of data quality is presented in Table QA2.
                    Table QA2 DATA QUALITY SUMMARY

                        Item                            Detail                                 Refer to Report and
                        Suitably Qualified Person       Andrew Winters                         -
                        Primary Laboratory              ALS Pty Ltd (Brisbane)                 Appendix H
                        Secondary Laboratory            ALS Pty Ltd (Sydney or Melbourne)      Appendix H
                        Documentation                   Chain of Custody Documentation         Appendix H
                        Completeness                    Areas and Chemicals of Environmental   Section 4 Areas and
                                                        Concern                                Chemicals of Environmental
                                                                                               Concern
                        Comparability                   Standard field procedures and NATA     Section 6 Sampling, Analysis
                                                        laboratory analysis                    and Quality Plan, Appendix H
                        Representativeness              Investigation and sampling strategy    Section 6
                        Sample Holding Times            Acceptable                             Appendix H and below
                        Accuracy - Blank                Acceptable                             Appendix H and below
                        Precision - Duplicates          Acceptable                             Appendix H and below
                        Laboratory QA                   Acceptable                             Appendix H and below


                    I1.3 LABORATORY PROCEDURES
                    HOLDING TIMES
                    Sample extraction commenced within recommended holding times from date of collection.
                    LABORATORY QA/QC
                    Laboratory QA/QC was undertaken and is considered acceptable. Routine quality control procedures
                    were conducted during every analytical run and was achieved by the following means:
                    •     Matrix spikes - samples were spiked by the laboratory with a known concentration of analytes and
                          then tested for percent recovery to monitor matrix effects on analyte recovery.

                    •     Surrogates – known quantities of similar compounds to the target analytes are added to samples to
                          monitor potential analyte loss at any stage of laboratory analysis.

                    •     Laboratory duplicates – a randomly selected sample is split and then analysed with the samples
                          forming the analytical run.

                    •     Method/laboratory blanks – use of reagent blanks to monitor potential contamination of equipment
                          and standards being used.




        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                                 Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                     94                          Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900