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HOUSTON LABORATORY <br /> 88880 INTERCHANGE DRIVE <br /> n HOUSTON TEXAS 77054 <br /> (713)560 0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3708 1 <br /> Analysis Gasoline Range Organics WorkOrder 01020792 <br /> Method' CA GRO- Lab Batch 1D R30616 <br /> Method Blank Samples in Analytical Batch <br /> RunID HP_R_0103o1B 585062 Units mg1L <br /> Lab Sample ID Client Sample ID <br />' Analysis Date 03/01/2001 13 59 Analyst D_R 01020792-01A MW-1 <br /> 01020792-02A MW-4 <br /> 01020792-03A M W-5 <br /> Analyte _ -- -i`Result Rep Limit 01020792-04A MW-6 <br /> Gasoline Rangee 0�__ ND _ 0050 <br /> 01020792-05A MW-7 <br /> Surr 1 4 Di4 Difluorobenzene 873 62-144 01020792-06A MVV-8 <br /> _Surr 4 6romafluarobonzene 98 3 _44 153 01020792-07A MW-9 <br />' 01020792-08A MW-10 <br /> C1020792-09A VEW-1 <br /> 01020792-10A VEW-3 <br />' Laboratory Control Sample LCS) _ <br /> RunID -P_F_0103018 585058 LJnits mg L <br /> Analysis Date 0310112001 13 33 Analyst D_R <br /> - Analvte- Spike Result Percent Lower Lepper <br /> Added Recovery Limit Limit <br /> Gasoline Range Organics 1 09 90 70 30 <br /> Matrix Spike MS 1 Matrix Spike Duplicate MSD <br />' Sample Spiked 01020792-02 <br /> RunlD H R 0103015 585066 Units mglL <br /> Analysis Date C3lC1/2001 16 03 Analyst l7 R <br /> Analyte --- - Sam le -- -- ---9. - -- - -- - — - <br /> p MS MS Result MS .o MSD MSD Result MSD % RPD RPD Low High <br /> Result Spike 'I Recovery Spike RecoveryLimit Limit , Limit <br /> Added Added <br /> --� <br /> Gasoline Range Organics - ND 09 039 955 0 9 0 83 88 9 723 36 36 160 <br /> i <br /> hfiers r�D1U -Not Detected at the Reporting Limit MI -Matnx Interference <br /> I B -Analyte detected in the associated Method Blank D -Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PCQL "- Recovery Outside Advisable QC Limits <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and 01020792 Page 76 <br /> rounding the reported RPD may differ from the displaved RPD values but is correct as reported <br /> 3'7 9101 3 03 52 PPq <br />