2009-05-19_REVISION - M1977416 (37)

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ENERGYLABORAWR/ES, INC. •2393 Salt Creek Highway(82601) • P.O. Box 3258, Casper, WY82602 Toll Free 888.235.0515 • 307.235.0515 • Fax 307.234.1639 • casperQenergylab.com • www.energy/ab.com QA/QC Summary Report S nt: Denison Mines (USA) Corp ect: West Sunday Mine Report Date: 04/02/09 Work Order: C09030572 Arwlyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual Method: E200.7 Batch: R116509 Sample ID: LRB 7 Method Blank Run: ICP3-C 0904016 04/01/0913:08 Boron ND mg/L 0.02 Calcium ND mg/L 0.2 Iron 0.04 mg/L 0.01 Magnesium 0.3 mg/L 0.2 Potassium ND mg/L 0.03 Silicon ND mg/L 0.03 Sodium ND mg/L 0.1 Sample ID: LFB 7 Laboratory Fortified Blank Run: ICP3-C_090401B 04/01109 13:13 Boron 0.893 mg/L 0.10 89 80 120 Calcium 49.4 mg/L 0.50 99 80 120 Iron 4.90 mg/L 0.030 97 80 120 Magnesium 47.1 mg/L 0.50 94 80 120 Potassium 48.5 mg/L 0.50 97 80 120 Silicon 9.35 mg/L 0.032 94 80 120 Sodium 46.1 mg/L 0.50 92 80 120 Sample ID: C09030649-002DMS 7 Sample Matrix Spike Run: ICP3-C 0904018 04/01/0919:25 Boron 0.436 mg/L 0.10 85 70 130 um 132 mg/L 1.0 93 70 130 0.465 mg/L 0.030 91 70 130 Magnesium 88.4 mg/L 1.0 86 70 130 Potassium 48.4 mg/L 1.0 90 70 130 Silicon 4.29 mg/L 0.10 70 130 A Sodium 47.8 mg/L 1.0 8s 70 130 Sample ID: C09030649-002DMSD 7 Sample Matrix Spike Duplicate Run: ICP3-C 0904018 04/01/0919:30 Boron 0.393 mg/L 0.10 77 70 130 10 20 Calcium 127 mg/L 1.0 83 70 130 3.8 20 Iron 0.421 mg/L 0.030 83 70 130 9.9 20 Magnesium 83.6 mg/L 1.0 77 70 130 5.6 20 Potassium 47.0 mg/L 1.0 87 70 130 2.9 20 Silicon 3.89 mg/L 0.10 70 130 9.8 20 A Sodium 44.6 mg/L 1.0 79 70 130 7 20 affiers: nalyte reporting limit. ND - Not detected at the reporting limit. A - The analyte level was greater than four times the spike level. In accordance with the method % recovery is not calculated. MDC - Minimum detectable concentration