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ENEROYLABORAWR/ES, INC • 2393 Salt Creek Highway (82801) • P.O. Box 3258 • Casper, WY82802 <br />Toll Free 888 235 0515 • 307 235 0515 • Fax 307.234.1639 • caspergenergylab.com • www.energylab.com <br />QA/QC Summary Report <br />nt: Denison Mines (USA) Corp Report Date: 04/02/09 <br />Qect: West Sunday Mine Work Order: C09030572 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: A2320 B Batch: R116395 <br />Sample ID: MBLK 3 Method Blank Run: MANTECH 090330A 03/30109 11:59 <br />Alkalinity, Total as CaC03 ND mg/L 0.2 <br />Carbonate as C03 ND mg/L 1 <br />Bicarbonate as HC03 ND mg/L 1 <br />Sample ID: LCS Laboratory Control Sample Run: MANTECH_090330A 03/30/0912:13 <br />Alkalinity, Total as CaCO3 52.8 mg/L 5.0 106 90 110 <br />Sample ID: LCS1 ? Laboratory Control Sample Run: MANTECH 090330A 03/30/0912:20 <br />Alkalinity, Total as CaC03 202 mg/L 5.0 101 90 110 <br />Bicarbonate as HC03 246 mg/L 5.0 101 90 110 <br />Sample ID: C09030572-001AMS Sample Matrix Spike Run: MANTECH_090330A 03/30/0912:36 <br />Alkalinity, Total as CaC03 705 mg/L 5.0 99 80 120 <br />Sample ID: C09030572-001AMSD Sample Matrix Spike Duplicate Run: MANTECH 090330A 03/30/0912:43 <br />Alkalinity, Total as CaC03 703 mg/L 5.0 97 80 120 0.3 20 <br />Method: A2640 C Batch: 090318 1 SLDS-TDS-W <br />Sample ID: MBLK1 090318 Method Blank Run: BAL-1 0903188 03/18/0914:52 <br />Solids, Total Dissolved TDS @ 180 C ND mg/L 6 <br /> <br />ale ID: LCS1 090318 Laboratory Control Sample Run: BAL-1 0903188 03/18/0914:53 <br />Solids, Total Dissolved TDS @ 180 C 957 mg/L 10 96 90 110 <br />Sample ID: C09030668-003AMS Sample Matrix Spike Run: BAL-1 0903188 03/18/0915:06 <br />Solids, Total Dissolved TDS @ 180 C 4800 mg/L 10 100 90 110 <br />Sample ID: C09030568-003AMSO Sample Matrix Spike Duplicate Run: BAL-1_090318B 03/1810915:14 <br />Solids, Total Dissolved TDS @ 180 C 4810 mg/L 10 100 90 110 0.1 10 <br />Sample ID: C09030576-001AMS Sample Matrix Spike Run: BAL-1 090318B 03/18/0915:17 <br />Solids, Total Dissolved TDS @ 180 C 2240 mg/L 10 100 90 110 <br />Sample ID: C09030576-001AMSD Sample Matra Spike Duplicate Run: BAL-1_090318B 03/18/0915:17 <br />Solids, Total Dissolved TDS @ 180 C 2230 mg/L 10 99 90 110 0.4 10 <br />rfiers: <br />Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration