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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive - Redwood City, CA 94063 <br /> (415) 364-9600 - FAX (415) 364-9233 <br /> RESNA Client Project ID W4801,PG&E Stockton Service Center <br /> 1710 Main Street <br /> I Escalon, CA 95320 <br /> -Attention Lois Frantz OC Sample Group 3B67101 Reported Mar 2, 1993 <br /> .vh .v ry < <br /> QUALITY CONTROL DATA REPORT <br /> I <br /> ANALYTE Extractable PCB 1260 <br /> Hydrocarbons <br /> Method EPA 8015 PCB <br /> Analyst C Lee L Haar <br /> Reporting knits mg/kg pg/L <br /> Date Analyzed Feb 24, 1993 Feb 18, 1993 <br /> QC Sample# 3BB89M 3850805 <br /> Sample Conc.. 120 N D <br /> i <br /> Spike Conc. <br /> Added: 150 500 <br /> Conc. Matrix <br /> Spike: 96 640 <br /> Matrix Spike <br /> %Recovery: 128 <br /> Conc Matrix <br /> Spike Dup.- 100 620 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 124 <br /> Relative <br /> %Difference 41 32 <br /> * Note Low matrix spike&duplicate recoveries due to matrix effect <br /> SEQUOIA ANALYTICAL Please Note Conc of M S -Conc of Sample x 100 <br /> Spike Conc Added <br /> a Relative%Difference Conc of M S -Conc of M S D x 100 <br /> Prollect <br /> Lee (Conc of M S + Coni of M S D 2 <br /> Manager 3867101 WAT <3> <br />