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OR NO <br /> . �. Me <br /> = ' <br /> 4. <br /> SEQUOIA A AWT'ICAL <br /> 680 Chesapeake Drive • Redwcod Ci A c40 <br /> City,C ,. 63 <br /> (415)364-9600 • FAX(415)364-92'33 <br /> Waterworks Client <br /> nt Project lD wA385.F elvesEaoco <br /> 1710 Main Street <br /> Esc alon,CA 9W,-0 <br /> -Attention: Greg Stahl OC SaTple Group 112-4773- 1992 <br /> 5 <br /> 2ps. <br /> - <br /> DUALRY CONTROL.DATA REPORT , <br /> ANALYTE ,y1. <br /> �+ Benzene Toluene benzans Xylenes Diesel <br /> i <br /> Method: EPA 8020 EPA= EMS= EFA 8020 EPA 801 S <br /> Analyst: J.Valor J.Viflar J.viiIw J.Villar R Lee <br /> Reporting Units: pg/L µ9/L Y9/L u9/L P9/L <br /> Date Analyzed: Jan 3. 1992 Jan 3, 1992 Jan .1. 1992 Jan 3. 1992 Jen 3, 1992 <br /> r, QC Sample#: GBLK01f1392 GBLKDID392 GBLKC10392 GBLK010392 DBU(010292 <br /> ti <br /> Sample Conc.: N.D. N.D. N.D. N.D. N.D. <br /> "f Spike Conn <br /> Added: 10 10 10 3Q 300 <br /> Conc.Matrix <br /> Spike: 9.1 9.2 9.1 '27 200 <br /> Matrlx Spike <br /> °.e Recovery: 91 92 91 90 67 <br /> Conc.Matrix <br /> Spike Dup.: 9.6 9.8 9.8 30 200 <br /> Matrix Spike <br /> Dupilcata - <br /> __ %Recovery: 98 98 98 100 67 <br /> Relative <br /> %Difference: 7.4 6.3 7.4 10 0.0 <br /> ;.. <br /> SEQUOIA ANALYTICAL %A,xovery: Conc,of M.S..Canc,or,ample " x t00 <br /> Spike Cana Added ` <br /> FeE_ave%Oiftemnce: Cane.of M.S.-f,",onc.of M.S.O. x 100 'f <br /> ria Lee (Cone,of M.S..Cane.of M.S,D.)/2 <br /> roject Manager 1124773.WAT c7> <br /> 1 , <br />