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• Pace Analytical <br /> f� <br /> 1673 Terra Avenue Sheridan,WY 82801 ph:(307)672-8945 <br /> ANALYTICAL QC SUMMARY REPORT <br /> CLIENT: Energy Fuels Resources(USA) Inc. Date: 3/22/2023 <br /> Work Order: S2302101 Report ID: S2302101001 <br /> Project: Whirlwind <br /> Thorium 230 in Water-Dissolved Sample Type: MBLK Units: pCUL <br /> MB-895(02/28/23 11:10) RunNo:208421 <br /> Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual <br /> Thorium 230(Dissolved) 0.2 0.2 <br /> Thorium 230 in Water-Dissolved Sample Type: LCS Units: pCi/L <br /> LCS-895(02/28123 11:10) RunNo:208421 <br /> Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual <br /> Thorium 230(Dissolved) 13 0.2 12 103 74-129 B <br /> Thorium 230 in Water-Dissolved Sample Type: LCSD Units: pCUL <br /> LCSD-895(02/28/23 11:10) RunNo:208421 <br /> Analyte Result RL Conc %RPD %REC %RPD Limits Qual <br /> Thorium 230(Dissolved) 13 0.2 13 1.90 101 20 B <br /> Total Silica as S102 Sample Type: MBLK Units: mg/L <br /> MB-20410(02/13/23 17:42) RunNo:207967 <br /> Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual <br /> Silica as Si02 ND 0.5 <br /> Total Silica as S102 Sample Type: DUP Units: mg/L <br /> S2302101-001BD(02/13123 17:48) RunNo:207967 <br /> Analyte Result RL Ref Samp %RPD %REC %RPD Limits Qua[ <br /> Silica as Si02 90.8 0.5 94.5 3.96 20 <br /> Solids By SM 2640 Sample Type: MBLK Units: mg/L <br /> DI(02/10/23 13:59) RunNo:208013 <br /> Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual <br /> Total Dissolved Solids(180) NO 10 <br /> Solids By SM 2640 Sample Type: LCS Units: mg/L <br /> CONTROL(02/10/23 14.02) RunNo:208013 <br /> Analyte Result RL Spike Ref Samp %REC %Rec Limits Qual <br /> Total Dissolved Solids(180) 2530 10 2460 103 90-110 <br /> Solids By SM 2640 Sample Type: DUP Units: mg/L <br /> S2302101-002A(02/10/23 14:11) RunNo'208013 <br /> Analyte Result RL Ref Samp %RPD %REC %RPD Limits Qual <br /> Total Dissolved Solids(180) 10 10 10 0 10 <br /> Page 12 of 16 <br />