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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
Acidity (as CaCO3) mg/L < 10 10 Pass
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
Acidity (as CaCO3) % 109 70-130 Pass
Chloride % 109 70-130 Pass
Sulphate (as SO4) % 115 70-130 Pass
LCS - % Recovery
Heavy Metals
Aluminium % 112 80-120 Pass
Aluminium (filtered) % 112 80-120 Pass
Iron % 110 80-120 Pass
Iron (filtered) % 109 80-120 Pass
QA Acceptance Pass Qualifying
Test Lab Sample ID Units Result 1
Source Limits Limits Code
Spike - % Recovery
Result 1
Chloride B25-Fe0031761 NCP % 94 70-130 Pass
Sulphate (as SO4) B25-Fe0034431 NCP % 75 70-130 Pass
Spike - % Recovery
Heavy Metals Result 1
Aluminium B25-Fe0039672 NCP % 119 75-125 Pass
Aluminium (filtered) B25-Fe0046226 NCP % 117 75-125 Pass
Iron B25-Fe0039672 NCP % 119 75-125 Pass
Iron (filtered) B25-Fe0042096 NCP % 107 75-125 Pass
QA Acceptance Pass Qualifying
Test Lab Sample ID Units Result 1
Source Limits Limits Code
Duplicate
Result 1 Result 2 RPD
Acidity (as CaCO3) B25-Fe0047962 CP mg/L < 10 < 10 <1 30% Pass
Chloride B25-Fe0046256 NCP mg/L 16000 19000 16 30% Pass
Conductivity (at 25 °C) B25-Fe0050852 NCP uS/cm 29000 29000 <1 30% Pass
pH (at 25 °C) B25-Fe0050852 NCP pH Units 8.3 8.3 <1 30% Pass
Redox Potential mV (relative to
Ag/AgCl) B25-Fe0049304 NCP mV 360 360 <1 30% Pass
Sulphate (as SO4) B25-Fe0046256 NCP mg/L 2600 2700 1.0 30% Pass
Duplicate
Heavy Metals Result 1 Result 2 RPD
Aluminium B25-Fe0046924 NCP mg/L < 0.05 < 0.05 <1 30% Pass
Aluminium (filtered) B25-Fe0041676 NCP mg/L < 0.05 < 0.05 <1 30% Pass
Iron B25-Fe0046924 NCP mg/L 1.8 1.6 12 30% Pass
Iron (filtered) B25-Fe0041676 NCP mg/L < 0.05 < 0.05 <1 30% Pass
Eurofins Environment Testing 1/21 Smallwood Place, Murarrie, QLD, Australia 4172 Page 8 of 9
Date Reported: Feb 25, 2025 ABN : 50 005 085 521 Tel: +61 7 3902 4600 Report Number: 1189604-W
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