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SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> ndusties�" ...a..L�....Arc:>: 548 <br /> c <toc on:: <br /> o'eo `S <br /> =:3164 Gold Camp Dr., Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention: Greg Altimari CC Sample Group: 3030263-74 Reported: Mar 23, 1993 <br /> ...... ......... <br /> i <br /> QUALITY CONTROL DATA REPORT <br /> i <br /> ANALYTE Ethyl- <br /> Benzene Toluene Benzene Xylenes <br /> r <br /> Method: EPA 8020 EPA W20 EPA 8020 EPA 8020 <br /> Analyst: Chiaravalloti Chiaravalloti Chiaravalloti Chlaravalloti <br /> Reporting Units: mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed: Mar 15, 1993 Mar 15, 1993 Mar 15, 1993 Mar 15, 1993 <br /> CC Sample#: 3034268 303-0268 303-0268 303-0268 <br /> Sample Conc.: N.D. N.D. N.D. N.D. <br /> Spike Conc. <br /> Added: 0.20 0.20 0.20 0.40 <br /> Conc. Matrix <br /> Spike: 0.17 0.17 0.18 0.36 <br /> Matrix Spike <br /> %Recovery: 85 85 90 90 <br />+ Conc.Matrix <br /> Spike Dup.: 0.18 0.18 0.18 0.37 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 90 90 90 93 <br /> Relative <br /> %Difference: 5.7 5.7 0.0 2.7 <br /> • SEQUOIA ANALYTICAL %Recovery: Conc.of M.S.-Conc.of Sample X100 <br /> Spike Conc.Added <br /> �dilk4�1 Relative%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 3030263.RES <4> <br />