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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> x (415)364-9600 • FAX(415)364-8233 <br /> ` I <br /> Waterwo ni Pro ect I 376, evron/ ocktDn <br /> 1710 Main Street <br /> Escalon,CA 95320 <br /> Attention Tina LePage CC Sample Group 1050430-0432 Re !b 20, 1991 <br /> QUALM CONTROL DATA REPORT <br /> ANALYTE E1hvl- <br /> Benzene Toluene Benzene <br /> EPA EPA EPA EPA <br /> Method 0015/8MD 8015/8024 Bata/em 8015/8= <br /> Analyst J Fanieeha J Fontacha J Foniedna J FoMecha <br /> Reporting Units mo/kg M9/W9 MGM mg/kg <br /> Date Analyzed May 12, test May 12, 1991 May 12, 1991 May 12, 1991 <br /> OC Sample# 1054004 IMM 1054004 105 a444 <br /> Sample Conc. N D N D N D N D <br /> Spike Cone <br /> Added. <br /> 040 040 040 12 <br /> Cone Matrix <br /> Spike. 044 040 040 11 <br /> Matrix Spike <br /> %Recovery 110 100 100 92 <br /> Cone Matnx <br /> Spike Dup 046 038 026 11 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery, 120 90 65 92 <br /> Relative <br /> %Difference 44 10 42 00 <br /> ;SE0lAANALYTIC %Recavary ne of M - of pie x 100Spike Added <br /> Adative�L Difference Cone of M S-Cone of M 5.D x 100 <br /> et Ma ( nc of AU + no of M S D) 2 <br /> t Manager 7050439 WAT <2> <br />