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SEQUOIA ANALYTICAL <br /> 680 y, 063 <br /> Drive • Redwood it Chesapeake A 4 <br /> p C 9 <br /> (415) 364-9600 FAX (415) 364-9233 3 <br /> I <br /> Waterwork Client Pro'ect ID: #49f), Thor a Weber Ave. <br /> 1710 Main Street <br /> �. E"SCaIOR CA 95320 <br /> sa <br /> 'Attenti n: <br /> .. aBili Channell QC Sample Group: 1041931- <br /> � I <br /> i <br /> 1932 Reported: Apr 25, 1991 <br /> .h <br /> II, <br /> .i <br /> QUALITY CONTROL DATA RE#PORT <br /> I ANALYTE i <br /> Diesel ; R <br /> Method: EPA 8015 ! ! <br /> Analyst: K.Lee <br /> Reporting Units: mg/kg <br /> Date Analyzed: Apr 18, 1991 <br /> QC Sample #: BILK 041891 � <br /> Sample Conc.: N.D. i <br /> Spike Conc. <br /> II <br /> Added: 10 <br /> �I <br /> Conc. Matrix <br /> Spike: 8.2 <br /> !I C <br /> Matrix Spike III <br /> %Recovery: 82 �! <br /> ! <br /> Conc. Matrix <br /> Spike Dup.. 8.4 <br /> Matrix Spike <br /> I <br /> Duplicate <br /> %Recovery: fi <br /> � <br /> Relative I <br /> %Difference: 2.4 I{ t <br /> i F <br /> I` i 4 <br /> SEQ. IA ANALYTICA %Recovery: Conc.of M.S.-Conc.of,Sample x 100 <br /> Spike Conc.Added <br /> Relative%Difference: Conc.of M.S.-Conc.of M.S.D. x 100 <br /> Izabeth W. ack (Cone.of M.S. + Conc.of M.S.D.)/2 <br /> roject Manager I; I 1041931.WAT <5> <br /> I' <br />