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al -M su <br /> �F ., <br /> St <br /> S <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood C¢ty.CA 94063 <br /> (415)364.9600 . FAX(415)364-9233 <br /> .:,'Della Environmental Consultants Gient Project ID: #40-88-586,01,Shell <br /> 3330 Data Drive <br /> ;Rancho Cordova,CA 95670 <br /> Attentlon Jim Brownell CC Sample Group: 1105817-23 Reported: Nov 8, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Ethyl. <br /> Benzene Tollsene Benzene Xylenes <br /> Method: EPA 8024 EPA 8020 EPA 8029 EPA a020 <br /> Analyst: C.ponohue C.Donohu4 C.Donohue C.Donohue <br /> Reporting Units: v9/L u9/L NP/L "fL <br /> Date Analyzed: Nov 4, 1991 Nov S, 1991 Nov 4, 1991 Nov 4, 1991 <br /> OC Sample#: GELK114491 GBLK110491 GBLK110491 138LKi7049i <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> w Spike Cone. <br /> Added: 10 10 10 30 <br /> Conc.Matrix <br /> Spike: 9.9 10 11 31 <br /> Matrix Spike <br /> Recovery: 99 100 110 103 <br /> Conc.Matrix <br /> Spike Dup.: 9.4 9.6 10 29 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 94 96 100 97 <br /> Relative <br /> %Difference: 5.2 41 9.5 6.7 <br /> 1 <br /> k <br /> E <br /> M <br /> SEQUOIA ANALYTICAL_ %Recovery: "Cane,at M.S.-Conc.of Sampla x 100 <br /> Spike vont,Added <br /> Relative%pifietencr.- Cane.of M.S.-Cant.of M.S.D. x 100 <br /> Mafia A.Springer (Cone,a'M.S. +Cenc.ut M.SA.L 1222 — <br /> Project Manager 110se16.0LT -4> <br />