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SEQUOIA ANALYTICAL <br /> NCO680 Chesapeake Drive • Redwood City, CA 94063 <br /> 1415P 364.9600 FAX ,a15) 364-9233 <br /> Waterworfc <br /> 1710 Mair:Street Client Project 10: #20147-1, Stephen's Anchorage " <br /> 3 <br /> � 'ESi:aiQr1, CA 95320 $ <br /> Attention C battram QC Sample Group:.9082654.6 <br /> � ., Report Sep <br /> ,. 12 1989 <br /> QUALITY CONTROL DATA REPORT <br /> ANALYTE <br /> Diesel Toluene <br /> Ethyl Xytenes <br /> i Benzene <br /> Method. EPA 8015 ERA 8020 EPA 8020 EPA 8020 <br /> f $ Analyst: E. Hamilton M. McBirney . McBirney . McBirney <br /> Reporting Units: mg/L erg/L pg/L <br /> Date Analyzed: Sep 7. 1989 Aug 29, 1989 Aug 29. 1989 Aug�/ ggg <br /> v° QC Sample#: Matrix <br /> 9083508 9083508 9083508 <br /> .f <br /> Sarnple Conc. N.D. N.D. NZ. N.D. <br /> y: <br /> Spike Conc. <br /> � <br /> w� Added: 317 2.5 2.5 7.5 <br /> Conc. Matrix # <br /> Spike: 320 2.36 2.52 7.54 <br /> Matrix Spike <br /> I <br /> %Recovery: 101 ga <br /> 101 101 <br /> Conc.Matrix <br /> Spike Dup.: 2752.73 2.63 7.6 <br /> s <br /> Matrix Spike <br /> x € Duplicate <br /> 6i %Recovery: 86 109 105 101 <br /> a- <br /> Relative <br /> % Difference: 15 <br /> 15 4.3 0.79 <br /> o- SEQUOIA ANALYTICAL ERelariv*% <br /> Conn.of M.S.-Conc,of Sample x 100 <br /> 1 <br /> Spike Conc.Addetl <br /> c , <br /> nce: Conca}M.S.D. x 100,ot,Ll.$..Cone, <br /> Arthur G. Burton fConc.o}M.$. + <br /> Laboratory Director Cone,of M.S.U)_/2 <br /> 9082654.wAr c3> <br />