Attachment 4 - Geotech Report · MCU23/0030

Quality Control Results


                                                                                                                              Acceptance Pass Qualifying
                                Test                                      Units        Result 1                                 Limits   Limits Code
Method Blank
Heavy Metals
 Aluminium                                                                mg/L           < 0.05                                  0.05         Pass
 Aluminium (filtered)                                                     mg/L           < 0.05                                  0.05         Pass
 Iron                                                                     mg/L           < 0.05                                  0.05         Pass
 Iron (filtered)                                                          mg/L           < 0.05                                  0.05         Pass
LCS - % Recovery
 Chloride                                                                   %             105                                   70-130        Pass
 Sulphate (as SO4)                                                          %             103                                   70-130        Pass
LCS - % Recovery
Heavy Metals
 Aluminium                                                                  %              92                                   80-120    Pass
 Aluminium (filtered)                                                       %              91                                   80-120    Pass
 Iron                                                                       %              84                                   80-120    Pass
 Iron (filtered)                                                            %              85                                   80-120    Pass
                                                            QA                                                                Acceptance Pass Qualifying
                   Test                Lab Sample ID                      Units        Result 1
                                                           Source                                                               Limits   Limits Code
Spike - % Recovery
Heavy Metals                                                                           Result 1
 Aluminium                             B23-Ja0019278        NCP             %            87                                     75-125    Pass
 Aluminium (filtered)                  B23-Ja0016244         CP             %            90                                     75-125    Pass
 Iron                                  B23-Ja0019278        NCP             %            82                                     75-125    Pass
 Iron (filtered)                       B23-Ja0016244         CP             %            93                                     75-125    Pass
                                                            QA                                                                Acceptance Pass Qualifying
                   Test                Lab Sample ID                      Units        Result 1
                                                           Source                                                               Limits   Limits Code
Duplicate
Heavy Metals                                                                           Result 1        Result 2        RPD
 Aluminium                             B23-Ja0017497         NCP          mg/L          < 0.05          < 0.05          <1       30%          Pass
 Aluminium (filtered)                  B23-Ja0017497         NCP          mg/L          < 0.05          < 0.05          <1       30%          Pass
 Iron                                  B23-Ja0017497         NCP          mg/L           0.39            0.38           2.0      30%          Pass
 Iron (filtered)                       B23-Ja0017497         NCP          mg/L           0.24            0.24           <1       30%          Pass




                                          Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia, 4172                          Page 5 of 6
  Date Reported: Jan 24, 2023                           ABN : 50 005 085 521 Telephone: +61 7 3902 4600                                 Report Number: 955949-W