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<br /> SEQUOIA ANALYTICAL
<br /> 680 Chesapeake Drive • Redwood City, CA 94063
<br /> F`' a (415)364-9600 FAX(415) 364-9233
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<br /> s RESNA Client Project ID: 8181 E. 11 th St.,Bracy
<br /> 1710 Main Street °{
<br /> Escalon, CA 95320 vx
<br /> n�5Attention: Lois Frantz QC Sample Group 2109762-3 Reported: Oct 12, 1992 Yr
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<br /> QUALITY CONTROL DATA REPORT
<br /> ANALYTE Ethyl-
<br /> Benzene Toluene benzene Xylenes Diesel
<br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 EPA 8015
<br /> Analyst: J.Dinsay J.Dinsay J.Dinsay J.Dinsay J.Dinsay
<br /> Reporting Units: pg/L ug/L Ng/L pg/L ug/L
<br /> Date Analyzed: Oct 7, 1992 Oct 7, 1992 Oct 7, 1992 Oct 7, 1992 Oct 7, 1992
<br /> QC Sample#: 210-9762 210-9762 21x9762 210-9762 210-9762
<br /> Sample Cone.: N.D. N.D. N.D. N.D. N.D.
<br /> Spike Conc.
<br /> Added: 10 10 10 30 600
<br /> Conc. Matrix
<br /> Spike: 9.9 9.7 9.8 29 579
<br /> Matrix Spike
<br /> %Recovery: 99 97 98 98 96
<br /> Conc.Matrix
<br /> Spike Dup.: 9.6 8.5 9.5 29 466
<br /> Matrix Spike
<br /> Duplicate
<br /> • Recovery: 96 85 95 98 78
<br /> Relative
<br /> • Difference: 3.1 2.1 3.1 0.0 21
<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 /> ri L B y (Conc.of M.S. + Conc.of M.S.D.) 2
<br /> oject Manager 2109762.WAT e9>
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