Response to outstanding issues - Revised Geo-Environmental Investigation-compressed · MCU25/0020

Client Sample ID                                                                        BH2 2.0-2.25 M BH2 2.25-2.5 M BH2 2.5-2.75 M BH2 2.75-3.0 M
Sample Matrix                                                                           Soil           Soil           Soil           Soil
Eurofins Sample No.                                                                     B25-Fe0047954 B25-Fe0047955 B25-Fe0047956 B25-Fe0047957
Date Sampled                                                                            Feb 18, 2025         Feb 18, 2025    Feb 18, 2025     Feb 18, 2025
Test/Reference                                                 LOR           Unit
Acid Sulfate Soils Field pH Test
pH-F (Field pH test)*                                           0.1        pH Units             8.7                   8.7         8.8                 8.6
pH-FOX (Field pH Peroxide test)*                                0.1        pH Units             6.9                   6.8         6.8                 6.8
Reaction Ratings*S05                                             0         comment              4.0                   4.0         3.0                 3.0
Actual Acidity (NLM-3.2)
pH-KCL (NLM-3.1)                                                0.1        pH Units              -                   9.5           -                    -
Titratable Actual Acidity (NLM-3.2)                              2         mol H+/t              -                   <2            -                    -
Titratable Actual Acidity (NLM-3.2)                            0.003       % pyrite S            -                 < 0.003         -                    -
Potential Acidity - Chromium Reducible Sulfur
Chromium Reducible Sulfur (s-SCr) (NLM-2.1)S04                 0.005        %S                   -                  0.019          -                    -
Chromium Reducible Sulfur (a-SCr) (NLM-2.1)                      3         mol H+/t              -                    12           -                    -
Extractable Sulfur
Sulfur - KCl Extractable                                       0.005         %S                  -                  0.020          -                    -
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               -                   1.1           -                    -
Acid Neutralising Capacity - (s-ANCbt) (NLM-5.2)S03             0.02         %S                  -                   0.34          -                    -
Acid Neutralising Capacity - (a-ANCbt) (NLM-5.2)                  2        mol H+/t              -                   210           -                    -
ANC Fineness Factor                                                         factor               -                   1.5           -                    -
Net Acidity (Including ANC)
s-CRS Suite - Net Acidity - NASSG (including ANC)               0.02        %S                   -                  < 0.02         -                    -
CRS Suite - Net Acidity - NASSG (Including ANC)                  10        mol H+/t              -                   < 10          -                    -
CRS Suite - Liming Rate - NASSG (Including ANC)S01                1        kg CaCO3/t            -                   <1            -                    -
Chromium Suite (SKCl) - NASSG (Excluding ANC)
<2mm Fraction                                                  0.005           g                 -                   150           -                    -
>2mm Fraction                                                  0.005           g                 -                 < 0.005         -                    -
Analysed Material                                               0.1            %                 -                   100           -                    -
Extraneous Material                                             0.1            %                 -                  < 0.1          -                    -
Sample Properties
% Moisture                                                        1            %                 -                    15           -                    -



Client Sample ID                                                                        BH2 3.0-3.25 M BH2 3.25-3.5 M BH2 3.5-3.75 M BH2 3.75-4.0 M
Sample Matrix                                                                           Soil           Soil           Soil           Soil
Eurofins Sample No.                                                                     B25-Fe0047958 B25-Fe0047959 B25-Fe0047960 B25-Fe0047961
Date Sampled                                                                            Feb 18, 2025         Feb 18, 2025    Feb 18, 2025     Feb 18, 2025
Test/Reference                                                 LOR           Unit
Acid Sulfate Soils Field pH Test
pH-F (Field pH test)*                                           0.1        pH Units             8.8                   9.0         8.7                 8.7
pH-FOX (Field pH Peroxide test)*                                0.1        pH Units             6.4                   6.7         6.1                 5.9
Reaction Ratings*S05                                             0         comment              4.0                   3.0         3.0                 3.0
Actual Acidity (NLM-3.2)
pH-KCL (NLM-3.1)                                                0.1        pH Units              -                   9.1           -                    -
Titratable Actual Acidity (NLM-3.2)                              2         mol H+/t              -                   <2            -                    -
Titratable Actual Acidity (NLM-3.2)                            0.003       % pyrite S            -                 < 0.003         -                    -



                                        Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia 4172                         Page 5 of 15

  Date Reported: Feb 25, 2025                             ABN : 50 005 085 521 Tel: +61 7 3902 4600                                 Report Number: 1189604-S