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SEQUOIA ANALYTICAL <br /> 680 Chesapeake-Drive • Redwood City,CA 94063 <br /> (415)364-9600 • FAX(415)364-9233 <br /> - w- --. ,-. .�.. -- <br /> Waterwork Client Project ID. W0602.1C,Cky of Stockton,Banner Island <br /> 1710 Main Street <br /> EscaJon,CA 95320 <br /> &Anention: BRI Channell OC Sampie Group: 2033053-55 Reported: Mar 26, 1992 <br /> Vu <br /> QUAUTY CONTROL DATA REPORT <br /> - ANALYTE <br /> Barium Beryllium Cadmium Chromium CoDart Copper Lead <br /> Method: EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 2010.7 EPA 2322 <br /> Analyst: C•Medefesaer C.Medetewer C.Medefeser C.Medefemr C.Medefeaw C.Medeftsaer S.Chin <br /> Reporting Units: m0/L rnp/L m0/L mg/L mg/L ROIL mg/L <br /> Date Analyzed: Mar 2o, 192Mar 20, 1992 Mar 20, 1992 Mat 20, 1922 Mar 20, 1992 Mar 20, 1902 Mat 2D. 1922 <br /> OC Sample#: 2033060 203.30010 2033060 203.3000 2033060 203-3060 203.= <br /> Sample Conc.: 0.61 N.D. N.D. 0.040 N.D. 0.044 0.0056 <br /> Spike Cone. <br /> Added: 1.0 1.0 1.0 1.0 1.0 1.0 0.10 <br /> Conc. Matrix <br /> Spike: 1.6 0.99 1.0 1.0 1.0 1.0 0.10 <br /> Matrix Spike <br /> %Recovery: 99 99 100 96 100 96 94 <br /> Conc. Matrix <br /> Spike Dup.: 1.6 0.97 1.0 1.0 1.0 1.0 0.10 <br /> Matrix Spike <br /> Duplicate <br /> X Recovery: 99 97 100 96 100 96 94 <br /> Relative <br /> X Difference: 0.0 2.0 0.0 0.0 0.0 0.0 0.0 <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S..Conc.of Sampie :100 <br /> Spike Conc.Aaded <br /> FW""%Difference: Cone.of M.S.-Cone.of M.S.D. a too <br /> ` (Conc.of M.S. • Cone.of M.S.D.) 2 <br /> oject Manager 2039053.WAT <7> <br />