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SEQUOIA ANALYTICAL <br /> 680 Chesapeake-Drive - Redwood City,CA 94063 <br /> (415)364-9600 FAX(415) 364.9233 <br /> watervrork Client Project ID: WOW2.1 C.City d Stockton-Banner Island <br /> 1710 Main Street <br /> Escaion,CA 96320 <br /> Attention: Bin Channell OC Sample croup: 2033291 - Reported^Apr 1. 19W <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Lead ►blybdenum hioicel S440.- Vanadium zW <br /> Method: EPA 2302 EPA 200.7 EPA 200.7 EPA 200.7 EPA 200.7 EPA 2M7 <br /> Analyst: S.Chin C.Medefeaeer C.Medefeaeer C.Medefea f C.Medefesaat C.Medefeseer <br /> Reponlin Units: R+9/L n+9/L rng/L m0/L Rf9/L RV/L <br /> Date Anatyzed: Mar 23, 1002 Mar 23, 1002 Mar 23, 1002 Mar 23, 1902 Mar 23, ISM Mar 23, 1002 <br /> OC Sample#: 203-3510 203.3293 203.333 2034293 20.33293 2033203 <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. 0.095 <br /> Spike Conc- <br /> Added: 0.10 1.0 1.0 1.0 1.0 1.0 <br /> Conc. Matrix <br /> Spike: 0.096 1.0 1.0 0.95 1.1 1.1 <br /> Matrtx Spike <br /> %Recovery: 96 100 100 95 110 101 <br /> Conc.MatncK <br /> Spike Dup.: 0.098 1.0 1.1 0.96 1.1 1.1 <br /> Maft Spike <br /> Duplicate <br /> %Recovery: 98 100 110 96 110 101 <br /> Relative <br /> %Difference: 2.1 0.0 9.5 1.0 0.0 0.0 <br /> SEQUOIA ANALYTICAL % r1r. Core.a M.S.-Conc of Sample a 100 <br /> Spike Cote.Added <br /> /f Ratati„e%Dif won=: Cone.of M.S.-Cone.at M.S.D. 1 100 <br /> vv <br /> (cone.of M.S. • Conc.of M.S.D.) 2 <br /> ect Manager 2033291.WAT <13> <br /> P <br />