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NINE. <br /> J_QA SEQUOIA ANALYTICAL <br /> IF 7 <br /> VA 680 Chesapeake Drive • redwood City,CA 94083 <br /> (415)384-9800 FAX(415)364-9233 <br /> �Waterwork <br /> ChantProject ID. <br /> 1710 Main Street 00148-f,Stockton Police <br /> �R Escalon,CA 95320 <br /> Attention Dave Welch <br /> 211MM", x F y. a QG Sample Group: i <br /> � .: ..<. 4 <br /> rted RepoNov 13 <br /> 1989 <br /> QUALITY CONTROL DATA REPORT <br /> f <br /> €�;�, Benzene <br /> Toluene Ethyl Xylenes <br /> r_ t� <br /> Benzene <br /> Method: EPA 6020 <br /> �3EPA 8020 EP4 8020 EPA 8020 <br /> Analyst: K Mitchell K Mitchell K Mitchell K.Mitchell <br /> Reporting Units: pg/L u9/L <br /> Date Analyzed: Nov B. 1989 �g/� N9/� <br /> QC Sample : Matrbc Nov B, IN9 Nov s, IN9 Nov 6, tsar <br /> s, Matrix Matrix Matrix <br /> EW Sample Cone.: N.D. ' <br /> N.D. N.D. N.D. <br /> g <br /> ) <br /> Spike Cone. <br /> Added: 2.5 <br /> 2.5 <br /> 2.5 7.5 . <br /> Cone.Matrix <br /> Spike: 2.3 2.1 2.3 6.9 <br /> t <br /> Metrix Spike <br /> %Recovery: 92 <br /> 5 : 84 .92 92 s <br /> Cone.matrix l <br /> Spike Dula.:. 2.4 2.2i <br /> 2.4 7.3 <br /> 6.; Matrix Spike . { <br /> Duplicate <br /> %Recovery: . gs i <br /> f9S 97 I <br /> Relative <br /> Difference• =-'- <br /> x - P" -4:3 ------ -----4.6 -- <br /> .4a., <br /> w^ { l SEQUOIA ANALYTICAL <br /> " 7N- <br /> ry x1Spike Can6.Prided <br /> ej r A.Bjork n Aea Nerana: Costa.o}M.S.•Iona.of M.S.D. x tt�o <br /> P j Manager iCanc a1 M.S.+Cone,of M,S.D.1 2 . <br /> ok <br /> r t <br /> ' 9103275.wAT <2> <br />