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i <br /> 680 ChesaDeake Drive Redwood CA 94063 <br /> SEQUOIA ANALYTICAL <br /> CitY. <br /> --� (415)364.9600 FAX(415);364-9233 <br /> Waterwork Client Project ID: #62102.1,Td Valley Growers Thornton <br /> 1710 Main Street <br /> Escalon,CA 95320 <br /> 60544-0060550 Reported Jul 12 1990 <br /> Attention...B(tf Channell QC Sample Group:00 <br /> . p p <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Benzene Toluene Ethyl Xylones a & <br /> Benzene G:oass <br /> EPA EPA EPA EPA <br /> Method: 5030/8020 5830/8020 5030/8020 5030/80211 5M55Y0G&F <br /> Analyst: G.Emory G.Emory G.Emory G.Emory G.Emory <br /> Reporting Units: u9/t. pq/t. P4/u u9/L N9IL <br /> Date Analyzed: Jul 2, Imo Jul 2. 1990 Jul Z 1990 Jul 2, 1990 Jun 30, t990 <br /> QC Sample#: 001-0100 007-0100 007-0180 007-0100 Tap water <br /> Sample Cone.: N.D. N.D. N.D. 9.0 N.D. <br /> Spike Cone. <br /> Added: 5.0 5.0 5.0 13 20 <br /> Cone.Matrix <br /> Spike: 4.6 4.2 5.0 26 20 <br /> Matrix Spike <br /> %Recovery: 92 84 100 110 100 <br /> Canc.Matrix <br /> Spike Dup.: 4.4 3,8 5.0 25 20 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 88 76 100 110 100 <br /> Relative <br /> %Difference: 4A 13 0.0 3.9 0.0 <br /> SEQUOIA ANALY`i"ICCone,of M.S.-Cone.of pie x 100 <br /> ke Canc.Added <br /> Relative%Difference: Cone,of M.S.-Canc.of M.S.D. x 100 <br /> th W.Hacid (Cane.o1 M.S.+—(%-n.o1 V.U.);2 <br /> Pr led Manager <br /> 63948.wAT <3> <br />