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HOUSTON LABORATORY <br /> S <br /> 9886 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> ® (7131 60-0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3942 1 <br /> knalysis Purgeable Aromatics WorkOrder 00090294 <br /> dethod- SW8821B Lab Batch ID 821482 <br /> Method Blank Samples in Analytical Batch <br />,unlD HP_N aoa92oa-408758 Units uglL Lab Sample ID Clic t Sam le f <br /> analysts Date 0912012000 10 35 Analyst OL 00090294-09A RW-1 <br /> 00090294-12A RW-4 <br /> Analyte Result Rep Limit <br /> Benzene ND D 507 <br /> Eih Ibenzono i NOI 0501 <br /> Methyl fort-butyl ether NO1 0 50 <br /> Toluene ND0501 <br /> m x tone ND 0 50 <br /> o-X lens I NO 0 50 <br /> X fenes Total NO 050 <br /> I` F Surr 1 4-0 fluorube one 94_g 72-137 <br /> Surr 4-8romo4uorobonzene 99 5 4&156 <br /> �aboratary Control Sample fLCS1 <br /> Runl0 HP_N 000920A-408756 Units ug/L <br /> Analysis Date 09 20/2000 9 17 Analyst OL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Benzene 50 53 107 70 130 <br /> Ethylbenzene 50j 53 106 70 130 <br /> Methyl tert-butyl ether 50 54 108 70 130 <br /> Toluene 50 53 106 70 130 <br /> m p-Xylene 100 110 106 70 130 <br /> o-Xylene 50 54 107 70 130 <br /> Xylenes,Total 150 1641 1091 70t 130 <br /> Matrix Spike_IMS}/Matrix Spike Dualrcat_e WlSDS <br /> LSample Spiked 00090424-01 <br /> RunlD HP_N o00920A-4o8759 Units ug/L <br /> Analysis Date 09/2012000 12 23 Analyst DL <br /> L <br /> Analyte Sample Result MS MS Result MS% MSD MSD Result MSD% RPD RPD Low High Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> ane NO 20 18 88 0 20 19 93 6 617 21 32 164 <br /> zene ND 20 17 8541 201 19 9261 611 19 52 142 <br /> eft-butyl ether ND 20 171 8721 201::: 19 96 31 9 84 20 391 150 <br /> liners. ND/U-Not Detected at the Reporting Urnit "-Recovery Outside Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MOL and POL MI-Matrrx interference <br /> 9121M 1 43 64 PM <br />