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SEQUOIA ANALYTICAL <br /> 680 Chesapeake Drive • Redwood City,CA 94063 <br /> (415) 364-9600 FAX(415) 364-9233 <br /> RESNA L nNn Client Project ID W4801, PG&E, Stockton Service Center <br /> 1710 Main Street <br /> 'Escalon, CA 95320 <br /> Attention Lois Frantz QC Sample Group 3C42201 _ Reported Mar 11, 1993 <br /> .c .n }� „h ,. t � ,.. .nS.�. tolr,�rr ,'4,v 3�,r,�iv`��`, v.r ,t.,i��L r •.,,,c tie„`�t-,V,+n r... `..,R:t.,, ,r•.o.v x �y✓v'x . <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE PCB 1260 <br /> i <br /> Method EPA 8080 <br /> Analyst L.Laikhtrnan <br /> Reporting Units Mg/kg <br /> Date Analyzed Mar 8,9,1993 <br /> QC Sample# P9=78-w <br /> Sample Conc : N D <br />� Spike Conc, �I <br /> Added: 500 <br /> Conc. Matrix <br /> Spike: 350 <br /> Matrix Spike <br /> %Recovery: 70 <br /> Conc. Matrix - - <br /> Spike Dip.: 330 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 67 _ <br /> Relative <br /> %Difference: 59 r <br /> SEQUOIA ANALYTICAL %Recovery Conc of M S -Conc of Sample X100 <br /> Spike Conc Added <br /> Relat ve%Difference Cone of M S -Conc of M S D x 100 <br /> 1ri1 <br /> e (Cone ofMS +Conc ofMSD) 2 <br /> o)ect Manager _ 3C42201 wAT <4> <br />