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' HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TX 77054 <br /> Quality Control Report (713)660-0901 <br /> EXXON Company U S A <br /> U P 3708 1 <br /> Inallysis Purgeable Aromatics WorkOrder 01110955 <br /> Method SW80218 Lab Batch 10 R48912 <br /> Matrix Spike(MSL I Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01111103-03 <br />' RunlD VARO_011202A-931969 Units ug/L <br /> Analysis Date 12/02/2001 16 02 Analyst D_R <br /> Analyte Sample MS M5 Result MS% MSD MSD Result MSD % RPD RPD Law High <br /> Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> Up Xylene 060 40 45 112 401 46 114 190 17 53 144 <br /> Xylene ND 20' 23 115 20 24 119 3 51 18 53 143 <br /> Xylenes Total 0 601 60 68. 112 601 70 116 292 18 53 144 <br /> 1 <br /> 1 <br /> qualifiers ND1U-Not Detected at the Reporting Limit M1 - Matrix interference <br /> B-Analyte detected in the associated Method Blank D -Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PQL '- Recovery Outside Advisable QC Limits <br /> Th ,cent recoveries for QC samples are correct as reported Due to significant figures and <br />�unding, the reported RPD may differ from the displayed RPD values but is correct as reported 12!10101 9 03 39 Ann <br /> 1 <br />