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ENERGY LABORATORIES, INC. • 2393 Salt Creek Highway (82601) • P.O. Box 3258 • Casper WY82602 <br />Toll Free 888 235 0515 - 307.235.0515 - Fax 307.234.1639 • casper@energylab. com - www energylab. com <br />QA/QC Summary Report <br />Client: Denison Mines (USA) Corp <br />Project: Sunday Mines Attenuation Tests - 68838 <br />Analyte Count Result Units <br />Method: E900.0 <br />Sample ID: MB-GrAB-0593 2 Method Blank <br />Gross Alpha -0.6 pCVL <br />Gross Beta -2 pCi/L <br />Sample ID: UNAT-GrAB-0593 Laboratory Control Sample <br />Gross Alpha 130 pCi/L <br />Sample ID: Cs137-GrAB-0593 Laboratory Control Sample <br />Gross Beta 80 pCi/L <br />Sample ID: C09010012-001AMS Sample Matrix Spike <br />Gross Alpha 150 pCi/L <br />Sample ID: C09010012-001AMSD Sample Matrix Spike Duplicate <br />Gross Alpha 143 pCi/L <br />Sample ID: C09010012-002AMS Sample Matrix Spike <br />Gross Beta 89.8 pCi/L <br />Sample ID: C09010012-002AMSD Sample Matrix Spike Duplicate <br />Gross Beta 83.6 pCi/L <br />Sample ID: C09010051-003ADUP 2 Sample Duplicate <br />Gross Alpha 2.52 pCi/L <br />Gross Beta -3.41 pCi/L <br />Report Date: 01/26/09 • <br />Work Order: C09010051 <br />RL %REC Low Limit High Limit <br />Run: G5000W 090115A <br />Run: G5000W_090115A <br />93 70 130 <br />Run: G5000W_090115A <br />88 70 130 <br />Run: G5000W_090115A <br />109 70 130 <br />Run: G5000W_090115A <br />104 70 130 <br />Run: G5000W_090115A <br />98 70 130 <br />Run: G5000W_090115A <br />92 70 130 <br />Run: G5000W 090115A <br />RPD RPDLimit Qual <br />Batch: GrAB-0593 <br />01/20/09 22:27 <br />U <br />U <br />01120/09 22:27 <br />01/20/09 22:27 <br />01/20/09 22:27 <br />01/20/09 22:27 <br />5 16.9 <br />01/20/09 22:27 <br />01/20/09 22:27 <br />7.2 16.4 <br />01 /21 /09 10:46 <br />110 227.9 U . <br />380 645.6 U <br />Qualffters: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. • <br />U - Not detected at minimum detectable concentration