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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415)364.9609 • FAX 1475)364.9233 <br /> D M Er1�rcinmontai'006nsuRarrts }CI'e'-n' t'fOJeci 0:440-8 5A6.01,Shell <br /> 113:.30 Data Drive <br /> ,Rancho Cordova,CA 95870 <br /> ;Attenikon Jim Brownell QC Sample Group: 1105817 23 Reported: Nov 8, 1991 <br /> QUALITi!CONTROL DATA REPORT <br /> a <br /> ANALYTE <br /> i <br /> �. ethyl- -- <br /> Benzene Toluene Benzene Xylenes <br /> Method: EPA 6020 EPA 8920 EPA eo2o EPA SM <br /> kflwySt: C,t:anohua C.Danahuo. C.Donohue C.Danohue <br /> FleporUng Units., NQfL vg/L vo/L jvgtL <br /> Date Analyzed: Nov 4, 1891 f1W 4, 1Q91 Nov 4, 1991 Nov 4, 1991 3 <br /> QC Sample 0: p6LXI10491 CIBLK110421 GBLX110491 03LK110491 <br /> S <br /> Samples Cone.: N.D. N.D. N.D. N.D. � <br /> Spike Cone. <br /> Addled: 10 10 10 30 <br /> Cone.Matrix <br /> Spike: 9.9 10 11 31 I <br /> ,I <br /> Matrix Spike <br /> %Recovery: 99 100 110 103 <br /> a <br /> Cone.Matrix <br /> Spike Dup.: 9.4 9.6 10 29 , <br /> i <br /> Matrix Spika i <br /> Duplicate <br /> %Recovery: 94 96 100 97 i <br /> 0 <br /> Relative E <br /> %Difference: 5.2 4.1 9.5 6.7 <br /> E <br /> 7 <br /> b <br /> SEGU01 ANNLYTICAL %Racovery: Cone,of M.S.•Cone.of Sam le x 100 <br /> Spike r.3nc,Adued <br /> P+lative%Difference: Cana.of MS.•Ccna.at M.9.0. x 100 <br /> elle A.Springer 1, 1 nc.or nn,s.+Uana.of M.S.D.)12 <br /> Project Manager 1105$1a.DLT <4> <br />