Attachment 4 - Geotech Report · MCU23/0030

Quality Control Results


                                                                                                                             Acceptance Pass Qualifying
                               Test                                      Units        Result 1                                 Limits   Limits Code
LCS - % Recovery
Actual Acidity (NLM-3.2)
 pH-KCL (NLM-3.1)                                                          %              95                                   80-120       Pass
 Titratable Actual Acidity (NLM-3.2)                                       %              89                                   80-120       Pass
LCS - % Recovery
Potential Acidity - Chromium Reducible Sulfur
 Chromium Reducible Sulfur (s-SCr) (NLM-2.1)                               %             113                                   80-120       Pass
LCS - % Recovery
Extractable Sulfur
 HCl Extractable Sulfur                                                    %             116                                   80-120    Pass
                                                           QA                                                                Acceptance Pass Qualifying
                  Test                Lab Sample ID                      Units        Result 1
                                                          Source                                                               Limits   Limits Code
Duplicate
Actual Acidity (NLM-3.2)                                                              Result 1        Result 2        RPD
 pH-KCL (NLM-3.1)                    B23-Ja0016291           CP       pH Units          5.0             4.9            1.2      20%         Pass
 Titratable Actual Acidity (NLM-3.2) B23-Ja0016291           CP       % pyrite S       0.018           0.018           <1       30%         Pass
 Titratable Actual Acidity (NLM-3.2) B23-Ja0016291           CP       mol H+/t           11              11            <1       20%         Pass
Duplicate
Potential Acidity - Chromium Reducible Sulfur                                         Result 1        Result 2        RPD
 Chromium Reducible Sulfur (s-SCr)
 (NLM-2.1)                           B23-Ja0016291           CP           %S           < 0.005        < 0.005           <1      20%         Pass
 Chromium Reducible Sulfur (a-SCr)
 (NLM-2.1)                           B23-Ja0016291           CP        mol H+/t           <3             <3             <1      30%         Pass
Duplicate
Extractable Sulfur                                                                    Result 1        Result 2        RPD
 Sulfur - KCl Extractable            B23-Ja0016291           CP           %S          < 0.005         < 0.005          <1       30%         Pass
 HCl Extractable Sulfur              B23-Ja0016291           CP           %S            N/A             N/A           N/A       20%         Pass
Duplicate
Retained Acidity (S-NAS)                                                              Result 1        Result 2        RPD
 Net Acid soluble sulfur (SNAS)
 NLM-4.1                             B23-Ja0016291           CP           %S             N/A             N/A           N/A      30%         Pass
 Net Acid soluble sulfur (s-SNAS)
 NLM-4.1                             B23-Ja0016291           CP           %S             N/A             N/A           N/A      30%         Pass
 Net Acid soluble sulfur (a-SNAS)
 NLM-4.1                             B23-Ja0016291           CP        mol H+/t          N/A             N/A           N/A      30%         Pass
Duplicate
Acid Neutralising Capacity (ANCbt)                                                    Result 1        Result 2        RPD
 Acid Neutralising Capacity -
 (ANCbt) (NLM-5.2)                   B23-Ja0016291           CP       % CaCO3            N/A             N/A           N/A      20%         Pass
 Acid Neutralising Capacity - (s-
 ANCbt) (NLM-5.2)                    B23-Ja0016291           CP           %S             N/A             N/A           N/A      30%         Pass
 ANC Fineness Factor                 B23-Ja0016291           CP          factor          1.5             1.5           <1       30%         Pass
Duplicate
Net Acidity (Including ANC)                                                           Result 1        Result 2        RPD
 CRS Suite - Net Acidity - NASSG
 (Including ANC)                     B23-Ja0016291           CP           %S            < 0.02         < 0.02           <1      30%         Pass
 CRS Suite - Net Acidity - NASSG
 (Including ANC)                     B23-Ja0016291           CP        mol H+/t           11             11             <1      30%         Pass
 CRS Suite - Liming Rate - NASSG
 (Including ANC)                     B23-Ja0016291           CP       kg CaCO3/t          <1             <1             <1      30%         Pass
Duplicate
Acid Sulfate Soils Field pH Test                                                      Result 1        Result 2        RPD
 pH-F (Field pH test)*               B23-Ja0016297           CP        pH Units         5.6             5.7           pass      20%         Pass
Duplicate
                                                                                      Result 1        Result 2        RPD
% Moisture                            B23-Ja0016300          CP            %            20              21             4.1      30%         Pass




                                         Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia, 4172                      Page 15 of 17
 Date Reported: Jan 19, 2023                           ABN : 50 005 085 521 Telephone: +61 7 3902 4600                                Report Number: 955951-S