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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> e4Q��MMACO HOUSTON, TX 77054 <br /> lie Quality Control Report (713)660-0901 <br /> EXXON Company U S A <br /> UP39k2 1 <br /> knalysis Purgeable Aromatics WorkOrder 01120303 <br /> Method SW8021 B Lab Batch ID R49869 <br /> Matrix Spike(MS)/Matrix Spike Duplicate(MSP) <br /> Sample Spiked 01120200-01 <br /> I RunID HP_U_011215A-950150 Units uglL <br /> Analysis Date 12/15/2001 17 18 Analyst DL <br /> Analyte I Sample MS MS Result I MS °f° MSD MSD Result MSD % I RPD , RPD 1 Low High <br /> Result Spike I Recovery I Spike Recovery I Limit ! Limit Limit' <br /> Added IAdded, ! ! ! <br /> p-Xylene I NDI 40! 411 1031 40 41 i 101i 1 601 171 531 144 <br /> -Xylene NDJ 201 221 1091 20 231 1141 5 201 18i 531 143 <br />(ylenes,Totai ND! 601 631 105J 60 641 1071 157' 181 531 1441 <br /> 1 <br /> I <br /> i <br /> I <br /> 1 <br /> I <br /> uahflers ND/U -Not Detected at the Reporting Limit MI-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 Limas <br /> he percent 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 12/19/01 3 48 09 PM <br /> I <br />