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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX(415) 364-9233 <br /> 4 <br /> '.",--RESNA <br /> Client Project ID: W0148, Stockton Police - <br /> <1710 Main Street <br /> =Escalon, CA 95320 <br /> 5 <br /> Att nti <br /> e <br /> ....... on: .ohnLan <br /> Lane QCSample Gro <br /> u : 2 75 <br /> 055,8 <br /> Reported: Aug <br /> 92 <br /> .: . <br /> 1 QUALITY CONTROL DATA REPORT <br /> t . <br /> ANALYTE Ethyl- <br /> Benzene, Toluene benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: R.Geckfer R.Geckler R.Geckler R.Geckler <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Aug 6, 1992 Aug 6, 1992 Aug 6, 1992 Aug 6, 1992 <br /> OC Sample#: GBLK080692 GBLK080692 GBLK080692 GBLK080692 <br /> MS/MSD MS/MSD MS/MSD MS/MSD <br /> f <br /> f Sample Conc: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 0.60 <br /> Conc. Matrix <br /> Spike: 0.19 0.19 0.19 0.55 <br /> Matrix Spike <br /> Recovery: 95 95 95 92 <br /> Conc. Matrix <br /> Spike Dup.: 0.19 0.19 0.19 0.57 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 95 95 95 95 <br /> Relative <br /> k %Difference: 0.0 0.0 0.0 3.6 <br /> SEQUOIA ANALYTICAL 6Recove <br /> Conc.of M.S.-Conc,of Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 r <br /> i L e (Conc.of M.S. + Conc.of M.S.D.) 2 <br /> Jr'oject Manager 2075055.WAT <3> <br />