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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX(916) 921-0100 <br /> iqW A tndu <br /> stnes Client Projecijb.-Arco#2130,Stockton <br /> =3164 Gold Camp Drive,Suite 200 <br /> Rancho Cordova,CA 95670 <br /> Rttentlon Eloise Frick QC Sample Gro <br /> ' up 2010436 41 43 <br /> Reported Jan 27 19, 92 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Method: EPA 7421 <br /> Analyst: S.Foster t <br /> Reporting Units: mg/kg <br /> Date Analyzed: Jan 23, 1882 ` <br /> OC Sample#: 112-0438 <br /> Sample Cone.: 3,g <br /> E <br /> Spike Cone. <br /> Added: 12.5 <br /> Cone.Matrix ' <br /> Spike: 15.3 <br /> ;0 <br /> a <br /> Matrix Spike <br /> %Recovery: 91 <br /> Cone.Matrix 3' <br /> Spike Dup.: 15.7 <br /> Matrix Spike <br /> i <br /> Duplicate <br /> %Recovery: 94 <br /> F <br /> Relative <br /> %Difference: 2.6 <br /> f E0U01A ANALYTICAL %Recovery: Conc.cf M.5.-Conc.at 5ampls x 100 <br /> �✓ S O Conc-Added <br /> Mi Relative%Difference: Con-C.of M.S.•Conc. <br /> Chasl R.Giles of M,S.D. x 100 <br /> Laboratory Director (Cone.of M.S.+Canc.of M.S.D.) 2 <br /> 112D438.RES <2> <br />