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1 <br /> j SEQUOIA ANALYTICAL <br /> 819 Striker Avenue, Suite 8 • Sacramento, CA 95834 <br /> (916) 921-9600 • FAX (916) 921-0100 <br /> RESNA Industries Client Project ID Arco #2076, Lodi <br /> 3164 Gold Camp Drive, Suite 200 <br /> Rancho Cordova, CA 95670 <br /> Attention Eloise Frick QC Sample Group 1110809-12 Reported Dec 5, 1991 <br /> QUALITY CONTROL DATA REPORT <br />' ANALYTE <br /> Cadmium Chromium Nickel Zinc Dead <br /> Method EPA 6010 EPA 6010 EPA 6010 EPA 6010 EPA 7421 <br /> Analyst Chiaravalloti Chiaravalloti Chiaravailotr Cihlaravallotl Chiaravalloti <br /> Reporting Units mg/kg mg/kg mg/kg mg/kg mg/kg <br /> Date Analyzed Dec 3, 1991 Dec 3, 1991 Dec 3, 1991 Dec 3, 1991 Dec 4, 1991 <br /> OC Sample # 111-0809 111-0809 111-0809 111-0809 111-0810 <br /> Sample Cone . 1 3 73 49 36 34 <br /> t Spike Cone <br /> Added. 130 130 130 130 63 <br /> Cone Matrix <br /> Spike 110 120 110 140 98 <br /> I <br /> Matrix Spike <br /> % Recovery 87 90 84 83 100 <br /> Conc. Matrix <br /> Spike Dup 130 140 130 170 98 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery 100 110 100 110 100 <br /> Relative <br /> % Difference 17 15 17 19 00 <br /> SEQUOIA ANALYTICAL %Recovery Cone of M S -Conc of Sample x 100 <br /> CAW Spike Conc Added <br /> `, Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Rick R DlMaio (Conc of M S + Conc of M s D)/2 <br /> Project Manager 1110809 RES <7> <br />