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RFI - Revised Geo-Environmental Investigation · MCU25/0020
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Quality Control Results
Acceptance Pass Qualifying
Test Units Result 1 Limits Limits Code
Method Blank
Chloride mg/kg <5 5 Pass
Conductivity (1:5 aqueous extract at 25 °C as rec.) uS/cm < 10 10 Pass
Sulphate (as SO4) mg/kg < 30 30 Pass
LCS - % Recovery
Actual Acidity (NLM-3.2)
pH-KCL (NLM-3.1) % 99 80-120 Pass
Titratable Actual Acidity (NLM-3.2) % 98 80-120 Pass
LCS - % Recovery
Potential Acidity - Chromium Reducible Sulfur
Chromium Reducible Sulfur (s-SCr) (NLM-2.1) % 105 80-120 Pass
LCS - % Recovery
Extractable Sulfur
HCl Extractable Sulfur % 114 80-120 Pass
LCS - % Recovery
Conductivity (1:5 aqueous extract at 25 °C as rec.) % 90 70-130 Pass
LCS - % Recovery
Chloride % 102 70-130 Pass
QA Acceptance Pass Qualifying
Test Lab Sample ID Units Result 1
Source Limits Limits Code
Spike - % Recovery
Result 1
Chloride M25-Fe0055089 NCP % 117 70-130 Pass
Sulphate (as SO4) M25-Fe0055089 NCP % 78 70-130 Pass
QA Acceptance Pass Qualifying
Test Lab Sample ID Units Result 1
Source Limits Limits Code
Duplicate
Acid Sulfate Soils Field pH Test Result 1 Result 2 RPD
pH-F (Field pH test)* B25-Fe0047932 CP pH Units 6.9 6.6 pass 20% Pass
Duplicate
Acid Sulfate Soils Field pH Test Result 1 Result 2 RPD
pH-F (Field pH test)* B25-Fe0047935 CP pH Units 8.6 8.5 pass 20% Pass
Duplicate
Actual Acidity (NLM-3.2) Result 1 Result 2 RPD
pH-KCL (NLM-3.1) S25-Fe0043807 NCP pH Units 7.7 7.8 <1 20% Pass
Titratable Actual Acidity (NLM-3.2) S25-Fe0043807 NCP mol H+/t <2 <2 <1 20% Pass
Titratable Actual Acidity (NLM-3.2) S25-Fe0043807 NCP % pyrite S < 0.003 < 0.003 <1 30% Pass
Duplicate
Potential Acidity - Chromium Reducible Sulfur Result 1 Result 2 RPD
Chromium Reducible Sulfur (s-SCr)
(NLM-2.1) S25-Fe0043807 NCP %S 0.13 0.13 <1 20% Pass
Chromium Reducible Sulfur (a-SCr)
(NLM-2.1) S25-Fe0043807 NCP mol H+/t 83 84 <1 30% Pass
Duplicate
Extractable Sulfur Result 1 Result 2 RPD
Sulfur - KCl Extractable S25-Fe0043807 NCP %S N/A N/A N/A 30% Pass
HCl Extractable Sulfur S25-Fe0043807 NCP %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 S25-Fe0043807 NCP %S N/A N/A N/A 30% Pass
Net Acid soluble sulfur (s-SNAS)
NLM-4.1 S25-Fe0043807 NCP %S N/A N/A N/A 30% Pass
Net Acid soluble sulfur (a-SNAS)
NLM-4.1 S25-Fe0043807 NCP mol H+/t N/A N/A N/A 30% Pass
Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia 4172 Page 13 of 15
Date Reported: Feb 25, 2025 ABN : 50 005 085 521 Tel: +61 7 3902 4600 Report Number: 1189604-S
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