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11 pgg;gg gqgg I I= <br /> YTICAL <br /> SEQUOIA ANAL <br /> 680 Chesapeake Drive �11R dw 923 y,CA 94063 <br /> (415)364-9600 • FAX <br /> Delta Environmental Consulta+us Client Project ID: #40-89-012,Tracy Shell <br /> -.3330 Hata Drive <br /> Rancho Cordova,CA 95670Reported Atig..28 1991 <br /> ,..Attention: Lisa Rainger, <br /> QC Sample Gruup: 1084120-22 <br /> QUALITY CONTROL RATA REPGRT <br /> Benzene Toluene <br /> Ethyl Xylenes <br /> ANALYTE Benzene <br /> EPA 8020 EPA 8020 EPA Su20 <br /> Method: EPA 8020 LLaikhtman L.taikhtman L.Laikhtman <br /> Analyst: L.Laikhtman f Pg/L pg/L <br /> Reporting Units: Vg/L 19/L <br /> 25, 1991 Aug 25, 1991 Aug 26, 1991 Aug 25. 1491 <br /> Date Analyzed: Aug GBLK082591 GBLK082591 GBLK082591 <br /> QC Sample#: GB <br /> S/MSD 1 MS/MSD NIS/MSD MS/MSP <br /> Sample Conc.: N.D. <br /> N.D. N.D. N.D. <br /> Spike Conc. ,0 10 30 <br /> Added: 10 <br /> Conc.Matrix 9 8 9.8 29 <br /> Spike: 9.8 <br /> Matrix Spike 9© 98 97 <br /> %Recovery: 96 <br /> Conc.Matrix 10 9,8 30 <br /> Spike Cup.: 9.8 <br /> Matrix Spike <br /> Duplicate 100 9.8 100 <br /> %Recovery: 3.8 <br /> Relative 2.0 0,0 3.4 <br /> %Difference: 0.0 <br /> �Flecovery: <br /> Conc.of M.S.-GUM.of Sample x 100 <br /> -- - — - ---- -_. <br /> ^EQUOIA ANALYTICAL Spike Conc,Added <br /> ~ Canc.of M.S.-Conc.of M,S-0. x 100 <br /> Relative 96 DitSesence: <br /> _Nfaile McBirriey Springer <br /> ` tCnnc,of M.S. Cvnc.of M.S.O.)12 1084120.oLT �2> <br /> Project Manager <br />