REFERENCE DOCUMENTS - RAL25/0004 (As Published)

                    •    Collection of grab soil samples from either the side of the test pit or from the bucket of the excavator
                         using gloved hands, or sampling trowel with respect to other surface samples. Nitrile gloves were
                         changed for each sample collected
                    •    Most sample locations included collection of soil samples at the surface or 0.25 mbgl, 0.5 mbgl, 1
                         mbgl then every 0.5 mbgl or as required by the SAQP or the judgement of the SQP based on field
                         observations
                    •    Based on field observations, sampling continued into natural soils below the base of all encountered
                         wastes

                    •    Collection of field duplicate samples with an analysis target of 1 field duplicate per 10 primary field
                         samples analysed in accordance with primary samples. With reference to Table 11 the actual field
                         duplicate to primary ratios were as follows:
                         -    1:11.7 Metals
                         -    1:11.6 OCP/OPP
                         -    1:11 SVOC
                         -    1:11 TRH/BTEXN
                         -    1:10 PFAS
                         -    1:10 PAH
                         -    1:10 PCB
                         -    no asbestos duplicates were collected.
                    •    Collection and analysis of field triplicates with an analysis target of 1 field triplicate per 20 primary
                         field samples analysed, with analysis of the primary and duplicate sample at the primary laboratory,
                         and analysis of the triplicate at a second NATA accredited laboratory. With reference to Table 11 the
                         actual field triplicate to primary ratios were as follows:
                         -    1:22 Metals
                         -    1:22 TRH/BTEXN
                         -    1:20 PFAS
                         -    1:17.5 OCP/OPP
                         -    1:15 PAH
                         -    1:15 PCB
                         -    no asbestos or SVOC triplicates were collected.

                    •    Use of laboratory supplied blank samples (analysed in accordance with primary samples) that was
                         used from the commencement of PSI, DSI 1 and DS12 soil sampling activities and analysed for
                         volatile TRH and, for DSI 1, PFAS

                    •    Use of properly calibrated PID and LFG monitors with calibration certificates presented in Appendix O
                    •    Samples were collected in laboratory prepared jars and placed in chilled insulated containers for
                         transport to the laboratory

                    •    Logging of location, lithology, sample depths, observations and signs of potential contamination,
                         water ingress etc


        125 Lot 105 SP118458 Cooroy DSI 12062024 Rev0                                                 Lot 105 SP118458, Cooroy, QLD, 4563
        12/06/2024                                                     38                          Detailed Site Contamination Investigation
Document Set ID: 23717062
Version: 0, Version Date: 01/01/1900