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SEQUOIA AWALYTICAL <br /> 680 Chesapeake Drive • Redwood City, CA 94063 <br /> (415) 364-9600 FAX (415) 364-9233 <br /> Waterwork 1 <br /> Client Project 1D: Mike Tropez <br /> :10710 MainStreetI° + <br /> E <br /> : scalon, CA 9532Q <br /> Attention: C. Battram OC Sample Group: 910-1496 Rapo Oct 23s � <br />,... ...:;. :..:.,,:yo-;::-y.;.:..:...:.::::,•: ... :::..:.:.::....:...:>.:..:. ;:.A. <br /> :,:...,::r.::..:.-:.-:...aa-.:..:.c...rx.;.:a. t:..: ::.:.....:::.:.„,.✓.i;:,:::.:..,::.:w>;;:...�.:.::..:.:::::..::..isr:rj:>:;:_'v:J:::: ?:?i�::2:::C �?:;% <br /> FNVIRC3N14 ENTAL RtALCN <br /> QUALITY CONTROL DATA REPORT PERIN'1T,,` V€CSS <br /> p <br /> ANALYTE Toluene Ethyl Xylenes . <br /> Benzene <br /> EPA EPA EPA " E <br /> Method: 8015/8020 8015/8020 8015/8020 X <br /> Analyst: G. Spak G. Spak G. Spak <br /> Reporting Units: mg/kg mg/kg mg/kg <br /> Date A m yzed: Oct 16, 1989 Oct 16, 1989 Oct 16, INS <br /> OC Sample #: 910-2118 910-2118 910-2118 <br /> Sample Conc.: N.D. N.D. N.D. <br /> Spike Cone. <br /> Added: 1.0 1.0 .o <br /> Cone. Matrix <br /> Spike: 0.64 0.92 2.7 <br /> Matrix Spike <br /> %Recovery: 64 92 90 <br /> Cone. Matrix <br /> Spike Dup.: 0.69 0.97 2.7 <br /> Matrix Spike <br /> Duplicate <br /> %Recovery: 69 97 90 <br /> Relative <br /> %Difference: 7.5 5.3 0.0 MN to k <br /> alyte!: <br /> EOUC <br /> SEOUOIA ANALYTICAL Recovery: Cone.of M.S.-Cone,of Sample x 100 <br /> gbeth <br /> Spike Cone.Adbelt <br /> F#elatjve%Difference: Cone.of M.S.-Cone.of M.S.D. x 100 W. Hacki (Cone.of M.S. + Cone.of M.S.p.) 2 lett t <br /> Manager <br /> 9101496.WAT <2> <br />