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i <br /> SEQUOIA ANALYTICAL <br /> 680 Chesapeake Dnve • Redwood City,CA 94083 <br /> (415) 364-9500 FAX(415)354-9233 <br /> jWaterwork Client Project ID• 376, Chevron Ah <br /> 1710 Mann Street /Stockton <br /> �Escalon, CA 95320 <br /> mon. Tina LePage OC Sample Group: 1050430-0432 <br /> Reported- May 20, 199t <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> D�esei <br /> Method EPA 8015 <br /> Analyst. J Malersbem <br /> Reporting Units mg/kg <br /> Date Analyzed May S. 1991 <br /> OC Sample#. auc 05=1 <br /> Sample Conc: N_D r <br /> 40 Spike Cone,, <br /> Added: 70 <br /> Conc. Matrix <br /> Spike: 7.1 <br /> Matrix Spike <br /> %Recovery: 71 <br /> Conc. Matrix <br /> Spike Dup.: 66 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: fib <br /> Relative <br /> % Difference: 7.3 <br /> OIA ANALYTIC L 7*"'XrrCXfferenc. <br /> Conc of M S -Conc of Sample x 100 <br /> Spske Conn Added <br /> fisConc of M.S -Conc of M S d x iao <br /> ofh Ha (Conc of M.S. t of M 5 D) 2 <br /> ;alat <br /> oject Manager <br /> 1450430 WAT <4> <br />