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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dave • Redwood City, CA 94063 <br /> (415) 3649600 • FAX (415) 364-9233 <br /> RESNA Client Project ID W4801, PG&E Stockton <br /> 1710 Main Street <br /> Escalon, CA 95320 <br /> Attention Lois Frantz QC Sample Group 3A46301 Reported Feb 5, 1993 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> 1260 PCB <br /> Method 8080/PCB <br /> Analyst L Laikhtman <br /> Reporting Units mg/kg <br /> Date Analyzed Feb 1, 1993 <br /> QC Sample# P9301472-02 <br /> Sample Cone.- N D <br /> Spike Cone. <br /> Added 500 <br /> Cone Matrix <br /> Spike 260 <br /> Matrix Spike <br /> %Recovery: 52 <br /> Cone Matrix <br /> Spike Dup.: 260 <br /> Matrix Spike <br /> Duplicate <br /> % Recovery. 52 <br /> Relative <br /> %Difference- 00 <br /> 'SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample X100 <br /> Spike Cone Added <br /> Relative%Difference Cone of M S -Conc of M S D x 100 <br /> r Lee (Conc of M S + Conc of M$D)/2 <br /> Project Manager 3AA6301 RES <11> <br />