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ENERGY LABORATOR/ES, INC. • 2393 Salt Creek Highway (82801) • P.O. Box 3258 • Casper, WY82802 <br />Toll Free 888.2350515 - 307235.0515 -Fax 3072341839 - caspergenergylab.com - www.energylab.com <br />r <br />QA/QC Summary Report <br />S nt: Denison Mines (USA) Corp Report Date: 04/02/09 <br />act: 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 03/26/0912:53 <br />Nitrogen, Nitrate+Nitrite as N ND mg/L 0.03 <br />Sample ID: LCS-2 Laboratory Control Sample Run: TECHNICON 090326A 03/26/0912:55 <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 03/26/0913:13 <br />Nitrogen, Nitrate+Nitrite as N 2.23 mg/L 0.10 98 90 110 <br />Sample ID: C09030672-001DMSD Sample Matrix Spike Duplicate Run: TECHNICON_090326A 03/26/0913:15 <br />Nitrogen, Nitrate+Nitrite as N 2.20 mg/L 0.10 97 90 110 1.4 10 <br />Sample ID: C09030765-001 DMS Sample Matrix Spike Run: TECHNICON 090326A 03/26/0913:50 <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 032610913:53 <br />Nitrogen, Nitrate+Nitrite as N 2.14 mg/L 0.10 103 90 110 3.3 10 <br />Method: E900.0 <br />Sample ID: MB-GrAB-0624 6 Method Blank <br />Gross Alpha 0.2 pCi/L <br />s Alpha precision (t) 0.6 pCi/L <br />46 s Alpha MDC 0.6 pCi/L <br />Gross Beta -0.2 pCUL <br />Gross Beta precision (t) 2 pCUL <br />Gross Beta MDC 2 pCUL <br />Sample ID: UNAT-GrAB-0624 Laboratory Control Sample <br />Gross Alpha 130 pCi/L <br />Sample ID: C09030589-001BMS Sample Matrix Spike <br />Gross Beta 96 pCi/L <br />Sample ID: C09030589.OOIBMSD Sample Matrix Spike Duplicate <br />Gross Beta 100 pCUL <br />Sample ID: C09030632-001ADUP 6 Sample Duplicate <br />Gross Alpha 0.018 pCUL <br />Gross Alpha precision (t) 0.59pCi/L <br />Gross Alpha MDC 0.65pCi/L <br />Gross Beta -2.0 pCUL <br />Gross Beta precision (t) 1.5 pCUL <br />Gross Beta MDC 1.6 pCi/L <br />Batch: GrAB-0624 <br />Run: G5000W_090327A 03/30/09 02:16 <br />U <br />U <br />Run: G5000W_090327A 03130/09 02:16 <br />96 70 130 <br />Run: G5000W 090327A 03/30/09 02:17 <br />103 70 130 <br />Run: G5000W 090327A 03/30/09 02:17 <br />107 70 130 4.1 15.9 <br />Run: G5000W 090327A 03/30/09 02:17 <br />250 1028.7 U <br />1.6 166.2 U <br />R V-'Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration