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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dr;ve • Redwood City,CA 94063 <br /> =- (415)3549600 - FAX(415)364-9233 <br /> Pr � <br /> Wateruork Client Project ID: #20195-1,WS/TR <br /> 1710 Main Street <br /> :Escalon, CAA 95320 <br /> �* Attention Dave Welch CC Sample Group Reported Nov 21 1989 <br /> ti <br /> QUALITY'CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene lithyl Xylenes i. <br /> Benzene <br /> a <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: C.Camba C.Camba C.Camba C. Camba <br /> Reporting Units: ppb ppb ppb ppb <br /> Date Analyzed; Nov 8, 1989 Nov S. 1989 Nov 8, 1969 Nov 8, 1989 <br /> CSC Sample#: Matrix Matrix Matrix Matrix <br /> Y' <br /> X <br /> Sample Corte.: N.D. N.D, N.D. N.D. <br /> Spike Cone. <br /> Added: 2.5 2.5 2.5 7.5 <br /> Cane.Matrix <br /> Spike: 2.3 21 2.3 6.9 <br /> Matrix Spike <br /> %Recovery: 92 84 92 92 <br /> Cone.Matrix <br /> Spike Dup.: 2.4 2.2 2.4 7.3 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 9f3 88 96 97 <br /> Relative <br /> %Difference: 4.3 4.7 4.3 5.6 <br /> I <br /> ir <br /> SEQUOIA ANALY-nC L %Recovery: Cone,of M.S.-Cone.of Sample x too <br /> Spike Cone.Added <br /> Flefsflve%t)iHerence: Cone.of M.S.-Cane.of M.S.C. x too <br /> rn A. Bjorkman iConc. <br /> r jest Manager 9103881"war <a> <br />