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CHEMWEST ANALYTICAL LABORATORIES <br /> BENZENE, TOLUENE, ETHYL BENZENE, XYLENES <br /> CW:CALUFT <br /> Quality Control <br /> Client ID: LQCS GCS W519 CHEMWEST ID: 9796-QC2 <br /> Date Analyzed : 07/16/92 Matrix : Water <br /> Spike $ <br /> Conc. Recovery Recovery <br /> Compound (ug/L) 9796-MBS 9796-MBSD RPD <br /> ----------------- __ ____ <br /> _ - W -10 -----_92$ <br /> Benzene 90% 21 <br /> Toluene 10 91$ 2% <br />' Ethylbenzene 10 91% 87% 4% <br /> p-Xylene 10 91% 86% 6% <br /> m-Xylene 10 92% 91% 1% <br /> o-Xylene 10 92% 89% 3% <br /> Total-Xylenes 30 92% <br /> -------------------------------------------------------------- <br /> Spike % % <br />' Conc. Recovery Recovery <br /> Surrogate (ug/L) 9796-MBS 9796-MBSD <br /> ------------------------------------------------------------ <br />' luorobenzene2095% 94% <br /> ------ -_____------ <br /> CALUFT: See Narrative <br /> 1 <br /> 1 <br /> Date Reported: <br /> Approved by: 07/28/92 REV 5 : 1 . 90 <br /> ('0MrU01FM WFCiFRN n1V1S1()N <br />