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aceAnalytiPace Analytical <br /> call - <br /> 1673 Terra Avenue Sheridan,WY 82801 ph:(307)672-8945 <br /> Date: 3/28/2024 <br /> CLIENT: Energy Fuels Resources (USA) Inc. CASE NARRATIVE <br /> Project: Whirlwind Waste Rock <br /> Lab Order: S2402263 Report ID: S2402263001 <br /> Entire Report Reviewed by: "'� �.Q.Q,--, <br /> Jessica Gillen, Project Manager <br /> Sample 2023_Whirlwind_WR was received on February 22, 2024. <br /> All samples were received and analyzed within recommended holding times, except those noted below in this case narrative. <br /> Samples were analyzed using methods outlined in the following references: <br /> Standard Methods for the Examination of Water and Wastewater, approved method versions <br /> EPA Test Methods for Evaluating Solid Waste, Physical/Chemical Methods, SW-846, online versions <br /> EPA methods 40 CFR Parts 136 and 141 EPA 600/2-78-054 methods <br /> NDEP Mining Methods <br /> 40 CFR Part 50, Appendices B, J, L, 0 and FEM EQL-0310-189 <br /> 10 Compendium Methods <br /> Clean Water Act Methods Update Rule for the Analysis of Effluent, current version. <br /> ASTM approved and recognized standards <br /> ISO approved and recognized standards <br /> USDA Handbook 60 <br /> Soil Survey Laboratory Manual Ver 4.0 <br /> ASA/SSSA 9 Methods of Analysis Part 2, 1982 <br /> ASA/SSSA Methods of Analysis Book 5 Part 3, 1996 <br /> Other industry approved methods <br /> All Quality Control parameters met the acceptance criteria defined by EPA and Pace Analytical except as indicated in this <br /> case narrative: <br /> Qualifiers by sample <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Aluminum- Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Barium - Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP -6010C/Calcium - Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Iron- Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP- 6010C/Magnesium - Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Phosphorus- Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Potassium - Spike Recovery outside accepted recovery limits <br /> S2402263-001 -Total (3050) Metals by ICP-6010C/Thallium - RPD outside accepted recovery limits <br /> Page 1 of 2 <br />