2022-02-09_PERMIT FILE - M2021046 ‎(5)‎

• Permit No: M2021046
• IBM Index Class Name: Permit File
• Doc Date: 2/9/2022
• Doc Name Note: Appendix B Gem Services Report
• Doc Name: Adequacy Review Response
• From: Zephyr Gold USA Ltd
• To: DRMS
• Email Name: TC1
• Email Name: MAC
• Media Type: D
• Archive: No

GEM SERVICES
Dawson Project-Tailings Characterization Page 15
Table 8: Shake Flask Extraction Results for Development Rock Samples
Development Rock Haz Waste EPA
Parameter Method Unit RDL GC-18 GC-21 GC-29B DA-9005 DA-9007 Regulation 40 CFR Part 440
261.24 Subpart J
Weight of dry sample used Weighing Scale g 0.01 250 250 250 250 250
Volume of DI water used Graduated Cylinder mL 0.50 750 750 750 750 750
On filtered samples(using 0.45 Nm filter paper):
pH Meter pH units 0.01 8.5 8.4 8.5 8.6 8.6 6-9
EC Meter mV 1.0 50 662 55 56 49
Acidity(to pH 8.3) Titration mg CaCO3/L 0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Total Alkalinity(to pH 4.5) Titration mg CaCO,/L 0.5 16.0 16.5 17.3 16.0 14.5
Dissolved Sulphate(SO4) Coloudmetry mg/L 0.5 <0.5 <0.5 <0.5 <0.5 <0.5
Chloride IC mg/L 0.05
Fluoride IC /L 0.02
Dissolved Metals Analysis b ICP-MS:
Hardness,Total(as CaCO3) CSIc. mg CaCO3/L 0.5 14.6 21.2 15.0 15.8 14.1
Aluminum Dissolved ICP-MS mg/L 0.001 0.41 0.237 0.239 0.543 0.277
Antimony Dissolved ICP-MS mg/L 0.0001 0.0003 0.0002 0.0003 0.0004 0.0005
Arsenic Dissolved ICP-MS mg/L 0.0002 0.0016 0.0009 0.0008 0.0017 0.0015 5
Barium Dissolved ICP-MS /L 0.0002 0.0028 0.0057 0.0042 0.0033 0.0843 100
Beryllium Dissolved ICP-MS mg/L 0.0001 <0.0001 <0.0001 <O.00D1 <0.0001 <0.0001
Bismuth Dissolved ICP-MS mg/L 0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
Boron Dissolved ICP-MS mg/L 0.01 0.01 0.03 0.01 0.03 0.03
Cadmium Dissolved ICP-MS mg/L 0.00001 <0.00001 <0.00001 <0.00001 <0.00001 <0.00001 1 0.05
Calcium Dissolved ICP-MS /L 0.05 5.1 7.3 1 4.6 5.6 5.2
Chromium Dissolved ICP-MS mg/L 0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005
Cobalt Dissolved ICP-MS mg/L 0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
Copper Dissolved ICP-MS mg/L 0.0005 <0.0005 <0.0005 <0.0005 0.001 0.0007 0.15
Iron Dissolved ICP-MS mg/L 0.01 0.01 0.02 0.01 0.02 0.04
Lead Dissolved ICP-MS /L 0.0005 1 0.0007 0.0028 <0.0005 0.0057 0.0017 5 0.3
Lithium Dissolved ICP-MS mg/L 0.0005 0.0011 0.0008 0.0042 0.0007 <0.0005
Magnesium Dissolved ICP-MS mg/L 0.05 0.470 0.7 0.8 0.4 0.3
Manganese Dissolved ICP-MS mg/L 0.0002 0.002 0.0039 0.0021 0.0021 0.0037
Mercury Dissolved ICP-MS mg/L 0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005 0.2 0.001
Molybdenum Dissolved ICP-MS /L 0.0001 0.0011 1 0.0006 0.0463 1 0.0028 0.0019
Nickel Dissolved ICP-MS mg/L 0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005
Phosphorus Dissolved ICP-MS mg/L 0.05 0.08 0.07 0.08 <0.05 0.05
Potassium Dissolved ICP-MS mg/L 0.05 2.09 1.11 1.99 0.9 1.79
Selenium Dissolved ICP-MS mg/L 0.0005 <D.0005 <0.0005 <0.0005 <0.0005 <0.0005 1
Silicon Dissolved ICP-MS /L 0.05 1.55 1.28 1.19 1.89 1.08
Silver Dissolved ICP-MS mg/L 0.00008 <0.00008 <0.00008 <0.00008 <0.00008 <0.00008 5
Sodium Dissolved ICP-MS mg/L 0.02 1.15 1.25 2.03 2.88 1.33
Strontium Dissolved ICP-MS mg/L 0.0002 0.0303 0.0424 0,128 0.0443 0.0609
Sulphur Dissolved ICP-MS mg/L 0.5 <0.5 <0.5 <0.5 <0.5 0.6
Tellurium Dissolved ICP-MS /L 0.0002 <0.0002 <0.0002 <0.0002 <0.0002 <0.0002
Thallium Dissolved ICP-MS mg/L 0.00005 <0.00005 <0.00005 <0.00005 <0.00005 <0.00005
Thorium Dissolved ICP-MS mg/L 0.0001 <0.0001 <0.0001 <0.0001 <0.0001 <0.0001
Tin Dissolved ICP-MS mg/L 0.0005 <0.0005 <0.0005 <0.0005 <0.0005 <0.0005
Titanium Dissolved ICP-MS mg/L 0.0005 0.001 0.0006 <0.0005 0.0008 0.0016
Tungsten Dissolved ICP-MS /L 0.0001 0.001 0.0003 0.0011 1 0.0004 0.0006
Uranium Dissolved ICP-MS mg/L 0.00005 0.00068 0.00075 0.00025 0.00692 0.00156
Vanadium Dissolved ICP-MS mg/L 0.001 0.002 0,002 <0.001 0.001 <0.001
Zinc Dissolved ICP-MS mg/L 0.001 <0.001 <0.001 0.002 <0.001 <0.001 0.5
Zirconium Dissolved ICP-MS /L 0.0001 0.0001 I<0.0001 i<0.0001 0.0003 0.0001
Sold=Exceedance of Hazardous Waste Reg§261.24 or 40 CFR Part 440 Subpart J
DDS/dds Zephyr_Dawson_Tailings_Characterization_FinaLReport,Feb.3,22,1:18 PM Feb 2022