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• SEQUOI ANALYTICAL „ <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> .NOF (415) 364-9600 • FAX(415)364-9233 <br /> WatefworkCllerlt Project ID: Eckholm <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Attention: 6,11 Channel! OC Sample Group: 104-3733 Reported: Mpy S. 1991 <br /> QUALITY CONTROL DATA REPORT =. <br /> ANALYTE <br /> Lead Cadrnium Chromium Zino Proanic lead <br /> c <br /> Method: EPA 7421 EPA 6010 EPA 6010 EPA 6010 L.UFT <br /> Analyst: V.Patel S Foster S.Foster S.Foster V.Patel <br /> Reporting Units: mg/kg nV/kg mg/kg mg/kg mg/kg } <br /> Date Analyzed: May 3, 1991 May 3. 1991 May 3, 1991 May 3. 1991 May 2. 1991 <br /> CC Sample#: 1043298 1043085 1044M 1043085 ?AatU <br /> Sample Cone.: 5.0 6.1 240 200 N.D. <br /> Spike Cone. <br /> Added: 50 250 250 250 0.25 <br /> i <br /> Cone. Matrix <br /> Spike: 45 270 530 510 0.23 <br /> Matrix Spike <br /> %Recovery: 60 110 120 120 92 <br /> Cone. Matrix <br /> Spike Dup.: 47 260 510 510 020 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 84 100 110 120 80 <br /> Relative <br /> %Difference: 4.3 3.8 3.8 OA 14 <br /> SEQUOIA ANALYTICAL RecowrY Cone,of M.S.-Conc,of Sample :100 <br /> Spike Cone.Added ' <br /> f3ela&o%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> }Izabeth . Ha (Cane.of M.S. + Conc.of M.S.D.) 2 <br /> Jo�ect Manager 1043731.WAT C 15> <br /> : <br /> .i: <br /> � i <br />