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j SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX(415) 364-9233 <br /> ` ` :D: <br /> : M148.01, <br /> Stockton PoiiClientPro1ectl <br /> ce <br /> 1710 Main Street <br /> > Escalon, CA 95320 <br /> -,..'.Attention: .I John n Lane <br /> DCSample Group: 2 <br /> 080548- <br /> 51 Reported: Aug13 1992 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluene benzene Xylenes <br /> Method: EPA 8020 EPA 8020 EPA 6020 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 /> .CC Sample#: GBLK080692 GBLK080692 GBLK080692 GBLK080692 <br /> Sample Cone.: N.D. N.D. N.D. N.D. �. <br /> Spike Cone. <br /> k Added: 0.20 0.20 0.20 0.60 <br /> Cone. Matrix <br /> Spike: 0.19 . 0.19 0.19 0.55 <br /> Matrix Spike <br /> %Recovery: 95 95 95 92 <br /> E 3' <br /> Cone. Matrix <br /> Spike Dup.: 0.20 0.21 0.20 0.59 <br /> Matrix Spike <br /> ;Duplicate <br /> %Recovery: 100 105 100 98 <br /> Relative <br /> %.Difference: 5.1 10 5.1 7.0 <br /> SEQUOIA ANALYTICAL %Recovery: 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 <br /> na Lee (Cont.of M.S. + Conc,of M.S.D.) 2 <br /> rQ]eCt Manager 2080548.WAT <3> <br />