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1 <br />BARRING~R I,ABORATORIL~S, INC. 2 6 -May- 99 <br />Page: Q-2 <br />15000 W. 6TH AVE., SUITE 300 GOLDEN, CO 60101 (303) 277.1667 FA% (303) 271-1669 Job : 9 9 212 7 E <br />Status: Final <br />Banks and Gesso LLC <br />QUALITY CONTROL REPORT <br /> <br />' <br /> <br />Sample Id Gross Alpha <br />Total <br />pCi/1 <br /> <br />+ 2a Gross Beta <br />Total <br />pCi/1 <br /> <br />+ 2Q <br /> Duplicate 0.0 ±6.6 13 ±8 <br /> Duplicate 2.5 ±7.9 13 ±8 <br /> RER 0.64 0.00 <br /> Std (found value) 83 ±4 92 ±2 <br /> Std (true value) 78 87 <br />' Std % rec. 106 106 <br /> Blank 1.2 ±0.7 1.4 ±0.6 <br /> Spike % rec. 98 99 <br /> <br /> <br />t <br />ll <br /> <br /> <br /> <br /> <br /> <br />1 Meeting The Analytical Challenges Of A Changing World Since 1961 <br />