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HOUSTON LABa <br /> 8880 INTERCHANGE <br /> DRIVE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> OleQ [713)66"901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3942 1 <br /> knalysis Purgeable Aromatics WorkOrder- 00090294 <br /> Aethod SW80218 Lab Batch 10 820843 <br /> Method Blank Samples to Analytical Batch. <br /> tunlD HP_N_000915A-404570 Units uglL Lab SamRle 10 Client Sample ID <br />,nalysts Date 09115/2000 11 36 Analyst pL OM90294-OIA MW-5 <br /> 00090294-02A MW-6 <br /> 0009029"3A MW-10 <br /> Analyte Result I Rep Limit 00090294-04A MW-7 <br /> RIBerizens ND 4 50 <br /> 00090294-05A 1W-1 <br /> ne ND 050 00090294-08A RW-2 <br /> -bu I ether ND 0 50 00090294-14A UVB-MVV-2 <br /> ND 4 54 00090294-15A UVB-MW-1 <br /> e NO 050 <br /> o-x iena NO 050 <br /> Xyfenasjotal ND 050 <br /> Surr 1 4-Difluorobenzene 916 72-137, <br /> Surr 4-Bromailuorobenzene 98 3 48-156 <br /> Zaboratory Control Sample[LCS) <br /> RuniD HP N_000915A-404568 Units ug/L <br /> Analysts Date 09/15/2000 101 B Analyst DL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br />' Benzene 50 53 105 70 130 <br /> Ethyibenzene 50 52 103 70 130 <br /> Methyl test-butyl ether 50 49 98 70 130 <br /> L Toluene 50 52 105 70 130 <br /> m,p-Xylene 100 100 105 70 130 <br /> o-Xylene 50 53 105 70 130 <br /> Xylenes,Tatal 150 153 1021 70 130 <br /> Matrix Spike(NLS)IMatnx Spike Duplicate(MSDI <br /> ' Sample Spiked 00090258-02 <br /> Run1D HP_NA0009i5A-404573 Units ug/L <br /> Analysis Date 0911 512000 13 04 Analyst CIL <br /> Analyte Sample Result MS M5 Result MS 96 MSD MSD Result M511% RPD RPD Low High <br /> Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> sne 1 5 20 20 904 20 21 975 756, 21 32 164 <br /> nzene 074 20 18l 887 20 201 941 590, 19 52 14 — <br /> ert-butyl ether 0 73 20 21 102 20J 251 123 18 9 20 39 i 50 <br /> ters NOW-Not Detected at the Reporting limit *-Recovery Outside Advisable CC Limits <br /> S-Analyte detected in the associated Mettlod Blank 0-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL Ml-Matrix Interference <br /> 9121100 1 0 51 PM <br />