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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood Cit CA 94063 <br /> P Y� J <br /> (415) 364-9600 FAX(415) 3649233 <br /> .....:.i..:. .:::::::: >::>:::::: ;»> ::::>::::: <br /> RESNA Client Project ID: WOi48.01, Stockton Police ry <br /> 1710 Main Street <br /> f �'Escalon, CA 95320 <br /> :Attention: John Lane QC Sample Group: 2080548-51 Reported: Aug 13, 1992 r <br /> :.....................:::::.:::.,..................................................................... .....:.:.:.._ .... . .. _. <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene' Toluene benzene Xylenes <br /> I4 Method: EPA 6020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: R.Geckler 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 /> QC Sample#: GBLK080692 GBLK080692 GBLK080692 GELK080692 <br /> ;i MS/MSD MS/MSD MS/MSD MS/MSD j <br /> i <br /> Sample Conc.: N.D. N.D. N.D. N.D. - <br /> Spike Conc. j <br />{� Added: 0.20 0.20 0.20 0.60 <br /> l <br /> i k <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 /> 6% Recovery: 95 95 95 95 <br /> l Relative <br /> %Difference: 0.0 0.0 0.0 3.6 <br /> i . <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc,of Sample x 100 <br /> Spike Conc.Added <br /> Kr6ject <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.Q. x 100 <br /> (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> anager 2080548.WAT <2> <br /> i <br /> l <br />