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ENERGYLABORA70R/ES,,/NG''?2393SaltCreekHighway(82601))•P.O. Box 3258 G'asper, WY82602 Toll Free 888.235.0515 +3071235.0515 • °Fax'907.234.1639 • casper@energylab.com wwwenergylab.coln Q? QA/QC Summary Report Client: Denison Mines (USA) Corp Project: Sunday Mines Attenuation Tests - 68838 Report Date: 01/28/09 Work Order: C09010008 Analyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: E200.8 Batch: R113131 Sample ID: LRB Method Blank Run: ICPMS2-C_090106A 01/06/09 13:14 Antimony 0.0001 mg/L 7E-05 Arsenic ND mg/L 6E-05 Molybdenum ND mg/L 5E-05 Selenium ND mg/L 0.0002 Uranium ND mg/L 1 E-05 Vanadium ND mg/L 3E-05 Sample ID: LFB Laboratory Fortified Blank Run: ICPMS2-C_090106A 01/06/09 13:20 Antimony 0.0482 mg/L 0.0010 96 85 115 Arsenic 0.0495 mg/L 0.0010 99 85 115 Molybdenum 0.0490 mg/L 0.0010 98 85 115 Selenium 0.0487 mg/L 0.0010 97 85 115 Uranium 0.0487 mg/L 0.00030 97 85 115 Vanadium 0.0485 mg/L 0.0010 97 85 115 Sample ID: C09010008-010BMS4 Sample Matrix Spike Run: ICPM S2-C_090106A 01/06/09 21:14 Antimony 0.0449 mg/L 0.050 89 70 130 Arsenic 0.0744 mg/L 0.0010 124 70 130 Molybdenum 0.148 mg/L 0.10 90 70 130 Selenium 0.584 mg/L 0.0010 70 130 A Uranium 0.0733 mg/L 0.00030 127 70 130 Vanadium 0.495 mg/L 0.10 70 130 A Sample ID: C09010008-010BMSD4 Sample Matrix Spike Duplicate Run: ICPM S2-C_090106A 01/06/09 21:21 Antimony 0.0442 mg/L 0.050 88 70 130 0 .20 Arsenic 0.0732 mg/L 0.0010 122 70 130 1.5 20 Molybdenum 0.144 mg/L 0.10 84 70 130 2.3 20 Selenium 0.564 mg/L 0.0010 70 130 3.5 20 A Uranium 0.0706 mg/L 0.00030 122 70 130 3.8 20 Vanadium 0.475 mg/L 0.10 70 130 4 20 A E Qualifiers: RL - Analyte reporting limit. A - The analyte level was greater than four times the spike level. In • accordance with the method % recovery is not calculated. ND - Not detected at the reporting limit.