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• 1 <br /> 4 SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br />• <br /> >FSNA In` <br /> Cf Ury,:. <br /> st esl'` <br /> `�C a o`ect`1D'Arco` 548`.Stockton'" <br /> " 3164 Gold Camp Dr., Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Greg Altimari OC Sample Group: 3030275-76 Reported: Mar 15, 1993::` <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE Ethyl_ <br /> Benzene Toluene Benzene Xylenes <br />• <br /> Method: EPA 8020 EPA 8020 EPA 8020 EPA 8020 <br /> Analyst: Chiaravalloti Chiaravalloti Chiaravalloti Chiaravalloti <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Mar 12, 1993 Mar 12, 1993 Mar 12, 1993 Mar 12, 1993 <br /> QC Sample#: 303-0276 303-0276 303-0276 303-0276 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br />•,� Spike Cone. <br /> Added: 0.20 0.20 0.20 0.40 <br /> Cone. Matrix <br /> Spike: 0.19 0.19 0.20 0.40 <br />• <br /> Matrix Spike <br /> %Recovery: 95 95 100 100 <br /> Cone. Matrix <br /> Spike Dup.: 0.19 0.19 0.20 0.40 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 95 95 100 100 <br />• <br /> Relative <br /> % Difference: 0 0 0 0 <br />• <br /> SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample x 100 <br /> Spike Conc.Added <br /> LRelative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Michael R. Giles (Conc.of M.S. + Conc.of M.S.D.)/2 <br /> Laboratory Director <br /> 3030275.RES <2> <br />