Attachment 4 - Geotech Report · MCU23/0030

                                                                                       BH1 - 2.0-            BH1 - 2.25-      BH1 - 2.5-          BH1 - 2.75-
Client Sample ID                                                                       2.25M                 2.5M             2.75M               3.0M
Sample Matrix                                                                          Soil                  Soil             Soil                Soil
Eurofins Sample No.                                                                    B23-Ja0016297 B23-Ja0016298 B23-Ja0016299 B23-Ja0016300
Date Sampled                                                                           Apr 29, 2022          Apr 29, 2022     Apr 29, 2022        Apr 29, 2022
Test/Reference                                                 LOR           Unit
Actual Acidity (NLM-3.2)
pH-KCL (NLM-3.1)                                               0.1        pH Units              -                      -             -                   5.0
Titratable Actual Acidity (NLM-3.2)                           0.003       % pyrite S            -                      -             -                  0.012
Titratable Actual Acidity (NLM-3.2)                             2         mol H+/t              -                      -             -                   7.7
Potential Acidity - Chromium Reducible Sulfur
Chromium Reducible Sulfur (s-SCr) (NLM-2.1)S04                0.005        %S                   -                      -             -                   0.12
Chromium Reducible Sulfur (a-SCr) (NLM-2.1)                     3         mol H+/t              -                      -             -                    77
Extractable Sulfur
Sulfur - KCl Extractable                                      0.005          %S                 -                      -             -                  0.009
HCl Extractable Sulfur                                        0.005          %S                 -                      -             -                   N/A
Retained Acidity (S-NAS)
Net Acid soluble sulfur (SNAS) NLM-4.1                        0.005         %S                  -                      -             -                   N/A
Net Acid soluble sulfur (s-SNAS) NLM-4.1S02                   0.005         %S                  -                      -             -                   N/A
Net Acid soluble sulfur (a-SNAS) NLM-4.1                        2         mol H+/t              -                      -             -                   N/A
HCl Extractable Sulfur Correction Factor                        1          factor               -                      -             -                   2.0
Acid Neutralising Capacity (ANCbt)
Acid Neutralising Capacity - (ANCbt) (NLM-5.2)                 0.01       % CaCO3               -                      -             -                   N/A
Acid Neutralising Capacity - (s-ANCbt) (NLM-5.2)S03            0.02         %S                  -                      -             -                   N/A
Acid Neutralising Capacity - (a-ANCbt) (NLM-5.2)                 2        mol H+/t              -                      -             -                   N/A
ANC Fineness Factor                                                        factor               -                      -             -                   1.5
Net Acidity (Including ANC)
CRS Suite - Net Acidity - NASSG (Including ANC)                0.02        %S                   -                      -             -                   0.14
CRS Suite - Net Acidity - NASSG (Including ANC)                 10        mol H+/t              -                      -             -                    85
CRS Suite - Liming Rate - NASSG (Including ANC)S01               1        kg CaCO3/t            -                      -             -                   6.4
Chromium Suite (SKCl) - NASSG (Excluding ANC)
<2mm Fraction                                                 0.005           g                 -                      -             -                   90
>2mm Fraction                                                 0.005           g                 -                      -             -                 < 0.005
Analysed Material                                              0.1            %                 -                      -             -                   100
Extraneous Material                                            0.1            %                 -                      -             -                  < 0.1


% Moisture                                                       1            %                 -                      -             -                    20



                                                                                       BH1 - 3.0-            BH1 - 3.25-      BH1 - 3.5-          BH1 - 3.75-
Client Sample ID                                                                       3.25M                 3.5M             3.75M               4.0M
Sample Matrix                                                                          Soil                  Soil             Soil                Soil
Eurofins Sample No.                                                                    B23-Ja0016301 B23-Ja0016302 B23-Ja0016303 B23-Ja0016304
Date Sampled                                                                           Apr 29, 2022          Apr 29, 2022     Apr 29, 2022        Apr 29, 2022
Test/Reference                                                 LOR           Unit
Acid Sulfate Soils Field pH Test
pH-F (Field pH test)*                                           0.1       pH Units             7.6                   5.5            8.2                   5.3
pH-FOX (Field pH Peroxide test)*                                0.1       pH Units             2.4                   2.5            2.6                   1.9
Reaction Ratings*S05                                             0             -               4.0                   4.0            4.0                   4.0
Actual Acidity (NLM-3.2)
pH-KCL (NLM-3.1)                                               0.1        pH Units              -                      -            5.9                    -
Titratable Actual Acidity (NLM-3.2)                           0.003       % pyrite S            -                      -           0.004                   -
Titratable Actual Acidity (NLM-3.2)                             2         mol H+/t              -                      -            2.7                    -
Potential Acidity - Chromium Reducible Sulfur
Chromium Reducible Sulfur (s-SCr) (NLM-2.1)S04                0.005        %S                   -                      -           0.076                   -
Chromium Reducible Sulfur (a-SCr) (NLM-2.1)                     3         mol H+/t              -                      -            48                     -



                                          Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia, 4172                         Page 3 of 17
 Date Reported: Jan 19, 2023                            ABN : 50 005 085 521 Telephone: +61 7 3902 4600                                  Report Number: 955951-S