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F - <br /> i <br /> a <br /> SEQUOIA AAL` ICAL <br /> 680 Chesapeake Drive • Redwood City,CA 04063 <br /> (415)364-9600 FAX(415)364-9233 <br /> .Walerwork Client Project"ID:385 Eckholm <br /> €1710 Main Street <br /> Escalon,CA 95320 Reported: May 17 1991 <br /> Attention Lois Frantz QC Sample�� aup 81043735 3740 <br /> w a, y P K <br /> w <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Laad <br /> Method: EPA 7421 <br /> Analyst: V.Patel <br /> Reporting Units: mt2/ke <br /> Date Analyzed: May 16, 1991 <br /> CC Sample#: 105-1396 <br /> Sample Conc.: 5.0 <br /> Spike Cone. <br /> Added: 50 <br /> Cone.Matrix <br /> Spike: 50 <br /> Matrix Spike <br /> %Recovery: 90 <br /> Conc.Matrix <br /> Spike Dup.: 52 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 94 <br /> Relative <br /> Difference: 3.9 <br /> - — - <br /> SEQUOIA ANALYTICAL x RecoveryConc.of M.S.=Cone;of Safnp a-- —X-100 <br /> - --- - - - - - <br /> Spike Conc.Ached <br /> Reis6"%Ditforence: Conc.of M.S.-Cane,of M.S.D. x 100 <br /> th ac {Cant.01 M.S.+Conc.of M.S.Q.i 12 R1043735.WA7 <2> <br /> ;( roject Manager <br /> f <br />