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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364.9604-"FAX(415)364-9233 <br /> 1EscaWaterwork Client Project ID. W0602 t C,Clgr atockton-Banner Isiand <br /> 1710 Main Street <br /> .� <br /> Jon,CA 95320 <br /> Arientjon: SIP Channell OC Sample Group 2033291 Reported: 1, 1992 <br /> .. .. r.._._ . _. .. _ __. <br /> QUAUTY CONTROL DATA REPORT <br /> ANALYTE fi•=avai•rn <br /> Arorony Thallium Arsenic Selenium Chr nnkxn <br /> Method: EPA 2042 EPA 2792 EPA 2W2 EPA 2702 EPA 7196 <br /> Anaiy5t: F.Contrrras F.Contreras F.Contras• F.C nueras V.Arftft <br /> Reporting Units: m0/L m0/L mp/L nV/L R+0/L <br /> Date Analyzed: Mar 25. 1002 May 25, 1902 Mar 25, 1002 Mar 25, 1992 Mar 20, 1902 <br /> OC Sample#: 243.3934 2033034 20334M 203340e 2033= <br /> Sample Cont:.: N.D. N.D. N.D. 0.036 N.D. <br /> Spike Cone. <br /> Added: 0.10 ` 0.10 0.25 0.25 0.50 <br /> y Conc. Matrix <br /> Spike: 0.11 0.097 0.24 0.26 0.50 <br /> Matrix Spike <br /> %Recovery: 110 97 96 90 100 <br /> Conc. Matrix <br /> Spike Dup.: 0.10 0.094 0.25 0.26 0.52 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 110 94 100 90 104 <br /> Relative <br /> %Difference: 9.5 3.1 4.1 0.0 3.9 <br /> SEQUOIA ANALYTICAL %Powvery. Conc.of M.S.-Conc.at Sarno" x 100 <br /> Spire Cone.Aoes•d <br /> FWaWN%DtM•nnas: Cane.of M.S.-Cone.of M.S.D. :100 <br /> (Conc.of M.S. . Conc.of M.S.D.) 2 <br /> P ojeft Manager 2033291.WAT OS), <br />