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HOUSTON LABORATORY <br /> 88801NTERCHANGE DRIVrz <br /> C} HOUSTON TEXAS 77054 <br /> t713l sea asoi <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3708 1 <br /> Analysis Purgeable Aromatics <br /> Method SW$0218 WorkOrder 01020792 <br /> Lab Batch ID R30812 <br /> Matrix Spike MS /Matrix S Ike Du licate MSD <br /> Sample Spiked 01020792-01 <br /> ' RunID HP_R_010301A 58500 Units ug/L <br /> Analysis Date 03/01/2001 15 12 Analyst D R <br /> Analyte Sample i MS M5 Result MS % MSD MSD Result MSD % RPD <br /> I RPD Law HighResult Spike Recovery ry Spike <br /> Recovery Limit 'imit Limit <br /> Added Added i <br /> L -- _ <br /> luene -- -- - ND 20 - 30 150 20 28 138 S 36 20 38 159 <br /> t,—Op-Xylene -� — _�ND 40 — 58 — --139 40 - - 56 -� 139 0314 - 53 44 <br /> o-Xylene ND' 20 28 137' 20 28 138 0 683 18 53 143 <br /> Uy�eri.. Total --- - - - - _ ---_— --- -- —� -- - — - --- - - - <br /> ND 60 83 1381 601 84 _ 140 1 20 18 53 444 <br /> f <br /> f <br /> fiers NIWU -Not Detected at the Reporting Limit MI -Matrix interference <br /> B -Analyte detected in the associated Method 3lank 0 Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PQL " Recovery Outside Advisable QC Limas <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 01020792 Page 15 <br /> 3/7EVD1 3 03 52 PM <br />