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F <br /> SEQUOIA ANALYTICAL <br /> 819 Striker Avenue Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> t RESNA industnes Client Project ID Arco#2076, Lodi <br /> 3164 Gold Camp Dr, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Greg Altiman QC Sample Group 2100599-602 Reported <br /> I <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> I Benzene Toluene Ethylbenzene X ones <br /> Method EPA 602 EPA 602 EPA 602 EPA 602 <br /> Analyst Chiaravalloti Chiaravalloti Chiaravalloti Chiaravalloti <br /> Reporting Units pg/L mg/L erg/L pg/L <br /> Date Analyzed Oct 27, 1992 Oct 27, 1992 Oct 27, 1992 Oct 27, 1992 <br /> OC Sample# 210.0495 210-0495 210-0495 210-0495 <br /> Sample Cone.: N D N D N D N D <br />• Spike Cone. <br /> Added: 10 10 10 20 <br /> Cone. Matrix <br /> Spike: 85 89 88 18 <br /> Matrix Spike <br /> %Recovery: 85 89 88 90 <br /> Cone. Matrix <br /> Spike Dup.: 87 91 90 18 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery 87 91 90 90 <br /> Relative <br /> % Difference 23 22 22 00 <br /> Quality Assurance Statement All standard operating procedures and quality control requirements have been met <br />. SEQUOIA ANALYTICAL 96 Recovery Cone of M S -Conc of Sample x 100 <br /> * - J Spike Cone Added <br /> f <br /> G✓ r/�`'� Relative%Difference Cone of MS -Cone of M S D x 100 <br /> Michael R Giles (Conc ofMS + Cone of M D /2 <br /> Laboratory Director <br /> 2100599 RES t4> <br />