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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TX 77054 <br /> Quality Control Report (713) sso-asal <br /> EXXON Company U S A <br /> UP3708 7 <br /> Lrialysis Purgeable Aromatics WorkOrder 01090831 <br /> Method SW8021 B Lab Batch ID 844277 <br /> Matrix Spike MS /Matrix S tke Duplicate MSD <br /> Sample Spiked 01090831-a1 <br />' RunlD VARE_010927C 844479 Units ug/L <br /> Analysis Date 09/27/2001 17 51 Analyst DL <br /> Analyte Sample �MS T MS Result MS /. MSD MSD Result MSD% RPD RPD Law -High <br /> Resuit Spike Recovery Spike Recovery Limit Limit Limit <br /> — I-AdAdded f <br /> ylenes Tota! ND _ 601 _64 10� 60 64 107 0 18, 53; 1441 <br /> I <br /> I <br /> 00 iers ND/U Not Detected at the Reporting Limit W Matrix <br /> Interference <br /> B -Anaiyte detected in the associated Method Blank D Recovery Unreportabie due to Dilution <br /> J - Estimated value between MDL and PQL ' Recovery Outside Advisable OC Limits <br /> The percent recoveries for QC samples are correct as reported Due to sigwticant figures and <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 1012,01 3 15 42 PM <br /> I <br />