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SEQUOIA ANALYTICAL <br /> 880 Chesapeake Drive • Redwood City,CA 94053 <br /> (415)564-96W • FAX(415)364-9233 <br /> aterwa w <br /> Client Pro!ect ID 376,Chevron. an <br /> 1710 Main Street <br /> lEscalxm,CA 86320 <br /> Attention Tina LePage QC Sample Group 1051338-1340 Reported: May 20. 1991 <br /> �n7 k 4»Ai.7rp�i +r <br /> QUALM CONTROL DATA REPORT <br /> ANALYTE <br /> t7+eW <br /> Meth 7d EPA 8015 <br /> Analyst. R Lse <br /> Reporting Units no <br /> Date Analyzed May 14. 1991 <br /> QC Sample# DOLK 051391 <br /> Sample Conc.: N D <br /> Spike Conc. <br /> Added. 900 <br /> Conc.Matrix <br /> Spike: 550 <br /> Matrix Spike <br /> %Recovery: 61 <br /> Conc.Matrix <br /> Solke Dup.: 540 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 60 <br /> Relative <br /> %Difference. 16 <br /> SSUOIA ANALYTI At_ %R000wry: ...... Gone of M c of pie a 100 <br /> ke Aided <br /> i <br /> Rafalve%Oftrence Cone of M S •CAm of M S D x 1x10 <br /> t $ a of WS + RaafM 0 2 <br /> 4Pbject Manager 10513M nrAT s5> <br /> I <br />