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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364-9600 FAX(415) 364.9233 <br /> 1 <br /> Waterwork Client Project ID: WD602.1 B.City of Stockton/Banner Island <br /> 1710 Main Street <br /> L=Escaion, CA 95320 Bin Channell OC Sample Group: 2032357.63 Reported: Mar 24, 1992 <br /> DUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> gum Nki* sIKW TWium vanadium Lne Arsenic <br /> Method: EPA 0010 EPA 0010 EPA 0010 EPA 0010 EPA 0010 EPA 0010 EPA 0010 <br /> Analyst: M.Mistry M.Mistry M.Mistry M.MWVy M.Mistry M.Mi"y M.AA WY <br /> Reporting Units: mg/kg mg/kg nq/kg mg/kg mg/kg nq/kg np/kg <br /> Date Analyzed: Mar 17, 199z Mar 17, 1992 Mar 17, 1992 Mar 17, 1992 Mar n. 1992 Mar 17, 1992 Mar n. 1992 <br /> OC Sample#: 203.2343 203.2343 203.2343 203-2343 203-2343 273-2343 2032343 <br /> Sample Cone.: N.D. 24 N.D. N.D. 36 36 7.0 <br /> Spike Conc. <br /> Added: 50 50 50 250 50 50 50 <br /> Conc. Matrix <br /> Spike: 47 72 48 200 84 83 57 <br /> Matrix Spike <br /> %F1en:overy: 94 96 96 8o 96 94 100 <br /> Conc. Matrtx <br /> Spike Dup.: 47 74 48 200 84 83 55 <br /> Matrix Spike <br /> Duplicate <br /> X Recovery: 94 100 96 80 96 94 96 <br /> Relative <br /> X Difference: 0.0 2.7 0.0 0.0 0.0 0.0 3.6 <br /> SEOUOIA ANALYTICAL %Rsoorery. Conc.a M.S.•Coni.of SampW s 10o <br /> Spike Conc.Add" <br /> toerANaov.,Y orn.r.no.: cont.a M.s.•cone.a M.s.o. :100 <br /> (Conc.a M.S. * Conc.or M.S.D.► 2roiect 20323S7.WAT <17> <br />