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.. ENERGYLABORATOR/ES,INC, •2393 Salt Creek Highway(82601)•P.0.Box 3258 • Casper WY82602 <br /> LAWWOMY Toll Free 888.235.0515 - 307.235.0515 • Far 307234.1639 • caspergenergylab.com•www.energylab.com <br /> Azz�� <br /> QA/QC Summary Report <br /> Client: Denison Mines(USA) Corp Report Date: 04/02/09 <br /> Project: West Sunday Mine Work Order: C09030572 <br /> Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: E353.2 Batch:R116304 <br /> Sample ID: MBLK-1 Method Blank Run:TECHNICON_090326A 03/26/09 12:53 <br /> Nitrogen,Nitrate+Nitrite as N ND mg/L 0.03 <br /> Sample ID: LCS-2 Laboratory Control Sample Run:TECHNICON_090326A 03/26/09 12:55 <br /> Nitrogen,Nitrate+Nitrite as N 2.43 mg/L 0.10 97 90 110 <br /> Sample ID: C09030572-001DMS Sample Matrix Spike Run:TECHNICON 090326A 03/26/09 13:13 <br /> Nitrogen,Nitrate+Nitrite as N 2.23 mg/L 0.10 98 90 110 <br /> Sample ID: C09030572-001DMSD Sample Matrix Spike Duplicate Run:TECHNICON 090326A 03/26/09 13:15 <br /> Nitrogen,Nitrate+Nitrite as N 2.20 mg/L 0.10 97 90 110 1.4 10 <br /> Sample ID: C09030765-001DMS Sample Matrix Spike Run:TECHNICON_090326A 03/26/09 13:50 <br /> Nitrogen,Nitrate+Nitrite as N 2.07 mg/L 0.10 99 90 110 <br /> Sample ID: C09030765-001DMSD Sample Matrix Spike Duplicate Run:TECHNICON_090326A 03/26/09 13:53 <br /> Nitrogen,Nitrate+Nitrite as N 2.14 mg/L 0.10 103 90 110 3.3 10 <br /> Method: E900.0 Batch:GrAB-0624 <br /> Sample ID: MB-GrAB-0624 6 Method Blank Run:G5000W 090327A 03/30/09 02:16 <br /> Gross Alpha 0.2 pCi/L U <br /> Gross Alpha precision(t) 0.6 pCi/L <br /> Gross Alpha MDC 0.6 pCi/L <br /> Gross Beta -0.2 pCi/L U <br /> Gross Beta precision(t) 2 pCi/L <br /> Gross Beta MDC 2 pCi/L <br /> Sample ID: UNAT-GrAB-0624 Laboratory Control Sample Run:G500OW 090327A 03/30/09 02:16 <br /> Gross Alpha 130 pCi/L 96 70 130 <br /> Sample ID: C09030589-001BMS Sample Matrix Spike Run:G500OW090327A 03/30/09 02:17 <br /> Gross Beta 96 pCi/L 103 70 130 <br /> Sample ID: C09030589-001BMSD Sample Matrix Spike Duplicate Run:G5000W090327A 03/30/09 02:17 <br /> Gross Beta 100 pCi/L 107 70 130 4.1 15.9 <br /> Sample ID: C09030632-001ADUP 6 Sample Duplicate Run:G5000W 090327A 03/30/09 02:17 <br /> Gross Alpha 0.018 pCi/L 260 10283 U <br /> Gross Alpha precision(t) 0.59pCi/L <br /> Gross Alpha MDC 0.65pCi/L <br /> Gross Beta -2.0 pCi/L 1.6 166.2 U <br /> Gross Beta precision(t) 1.5 pCi/L <br /> Gross Beta MDC 1.6 pCi/L <br /> Qualifiers: <br /> RL-Analyte reporting limit. ND-Not detected at the reporting limit. <br /> MDC-Minimum detectable concentration U-Not detected at minimum detectable concentration <br />