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SEQUOIA ANALYTICAL <br /> . 1900 Bates Avenue • Suite LM • Concord,California 94520 <br /> 1510)586-CSOO • FAX(510) 686-9689 <br /> ��' ' �+ anar <br /> LIAttendon <br /> ark(Escalon Office) Client Project ID #W0169-8JJ Trucking,Tracyin Street,CA 92o <br /> Nara fSataoka QC Sample Group 1101057-58 Fie rise Nov 7, 1991 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl- <br /> Benzene Toluone Benzene Xylenee Diesel <br /> EPA EPA EPA EPA <br /> Method 8015/$020 8015/8020 8015/8020 8015/8020 EPABai5 <br /> Analyst R.H/J F FLH/J F FtH/J F Ft.H/J F A Tuxon <br /> Reporting Units ug/L ug/L ug/L ug/L Ua/L <br /> Date Analyzed Nov 1, 1991 Nov 1. 1991 Nov 1. 1991 Nov 1, 1991 Oct 31. 1991 <br /> QC Sample# Matrix Blank Matrix Blank Matrix Blank Matnx Blank Bl.K10289i <br /> Sample Conc: N D N D N D N D N D <br /> Spike Conc. <br /> . Added: 20 20 20 60 300 <br /> Conc.Matrix <br /> Spike: 21 17 14 46 240 <br /> Moft Spike <br /> %Recovery: 1051 as 70 77 80 <br /> Conc.Matrix <br /> Spike Dup.: 21 18 14 46 260 <br /> Matrix Spike <br /> Duplilcate <br /> %Recovery: 105 90 70 77 87 <br /> Relative <br /> %Difference: 0 S7 0 0 64 <br /> Laboratory blank contained the following analytes None Detected <br /> SEGLfOIA ANAYTiC %Reooverr Cone of M S.-L.)nc of Sam le x 100 <br /> Spike Gone,Added <br /> Relative%Difference Cone of KS -Conc of M 8 D x 100 <br /> JI alerstein nc of M S +Cone of MSD 2 <br /> r ect Manager <br /> 1101057wnr <sz, <br />