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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood Gily,CA 94063 <br /> (415)364-9600 FAX(415)364-9233 <br /> .::vena �idiw.Environmental Consultants Client Project ID:#40.89-012/Tracy Blwi.-Shell p <br /> �v <br /> ,3330 Data Drive 1: <br /> :Rancho Cordova,CA 95670 OC Sample Group D110722 24 Reported: Nov 27, �1990„, <br /> Attention Jim Brownell :- <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl <br /> f3enzane Toluene Barcena xylenes <br /> Method: EPA8015/8020 EPA8015/8020 EPA801518020 EPA8015/8020 <br /> AnalySt: K.Lae/E.Hamilton fv tae E.Hamilton K.Loe <br /> Reporting Units: u?/L A/L uc/L 1�9/L <br /> Date Analyzed: Nov 26, 1590 Nov 2ti, 1990 Nov 26, 1980 Nov 26, 7950 <br /> OC Sample#: oil-o= 011.0= alt alt 0s22 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> F . .Spike Cone. <br /> Added: 20 20 20 60 <br /> Cors,Matrix 19 57 <br /> Spike: 21 20 <br /> Matrix Spike 95 <br /> %Recovery: 110 100 95 <br /> Conc.Matrix 1g 53 <br /> Spike Dup.: 18 18 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 90 90 90 BB <br /> Relative 7.3 <br /> °.b Dflterence: 15 11 5.4 <br /> —:01.101A ANALYTICAL 56 Reeovery <br /> conc.of M.S.•Conc.of Sample - x ioD---- ------- — — - <br /> Spike Cana.Added <br /> Relative%pitference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Julia R.Materstein (Conc.of M.S.+Conc.of M.S.D.) 2 110722-DLT <2> <br /> Project Manager <br />