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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 /> UP3708 I <br /> 1nalysls Gasoline Range Organics WorkOrder 01110955 <br /> Method CA GRO Lab Batch 1D R48900 <br /> Method Blank Samples in Analytical Batch <br /> lunlo VARD_011201B-931788 Units mg1L Lab Sample ID Client Sample ID <br /> 4nalysis Date 12/01/2001 13 27 Analyst D_R 01110955-01A MW 1 <br />' 01110955-02A M W 4 <br /> 011 10955-03A M W 5 <br /> — - - — --- - 01110955-04A MW6 <br /> Analyte Result Rep Limit <br />' 01110955-05A MW7 <br /> Gasoline Range Organics �ND� 0 OSS <br /> Surr_1 4-Diflucrobenzene 957 62-144 <br /> Surr 4-18romofluorobenzene 93 3 44-153 <br /> Laboratory Control Sample LCS <br /> RunlD VARD_011201B-931785 Units mg/L <br />' Analysis Date 12101/2001 13 01 Analyst D_R <br /> Analyte Spike ResultPercent Lower Upper <br />' Added I Recovery Limit Limit <br /> (- <br /> Gasoline Range Organics 1 081 81 70 130 <br /> Matrix Spike MS I Matrix S12ike Duplicate MSD <br /> Sample Spiked 01110879-04 <br /> RunID VARD_011201B-931790 Units mg1L <br /> Analysis Date 12/01/2001 14 43 Analyst D_R <br /> Analyte Sample MS MS Result MS % MSD MSD Result MSD % RPD RPD Low I High <br /> Result Spike Recovery Spike Recovery Limit Limit i Limit <br /> Added Added <br /> 9-111ne-Range Organics ND 09 098 109 091 0 95 106 350 36 36 160 <br /> ualifiers ND1U Not Detected at the Reporting Limit Mt- 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 /> The 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 903 18 AM <br />