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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TX 77054 <br /> Quality Control Report (713)660-0901 <br /> 1*XXON Company U S A - <br /> t1P3708 i <br /> Inalysis Gasoline Range Organics WorkOrder 01110955 <br /> Method CA_GRO Lab Batch 10 R48883 <br /> Method Blank Samples in Analytical Batch <br /> LID VARE_011201S-931455 Units mg/L Lab Sample ID Client Sample ID <br /> Analysis Date 12/01/2001 18 30 Analyst DL 011 10955-07A MW9 <br />' 01110955-08A MW 1 D <br /> r <br /> Analyte w T Result Rep Limit_ _ __ <br /> Gasoline nk <br /> Rae Organics ND__ 0 050 <br /> Surr 1 4-Diftuorobenzene 100 0 62-144 <br /> Surr 4-Bramaftuorobenzene <br /> Laboratory Control Sample LCS <br /> Run)[) VARE_011201B-931454 Units mg/L <br /> Analysis Date 12!0112001 18 05 Analyst DL <br /> Analyte I Spike , Result Percent Lower Upper <br />' I Added Recovery Limit Limit <br /> Gasoline Range Organics 11 086, 86 70 130 <br /> Matrix Spike(MS11 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01111102-03 <br />' RunlD VARE_011201B-931456 Units mg/L <br /> Analysis Date 12/01/2001 19 44 Analyst DL <br /> Analyte Sample MS MS Result MS % MSD MSD Result MSD% RAD RPD Low High <br /> Result Spike Recovery Spike Recovery Limit Limit i Limit <br /> Added Added <br />'sotme Range Organics ND 0 9 0 77 85 8 0 9 0 791 87$ 2 301 36 36 160 <br /> I <br /> 1 <br /> Qualifiers N61U-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 Outs:de 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 12noroi 9 o2 44 AM <br />