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' HOUSTON LABORATORY <br /> 0880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> Q {713]660-0901 <br /> Quality Control Report <br />' EXXON Company U S A <br /> UP3942 1 <br /> Analysis Gasoline Range Organics WorkOrder 01060855 <br /> ethod CA CRO Lab Batch ID R37906 <br /> Method Blank Samples in Analytical Batch <br /> RunlD VARD_010626B-720645 Units mg/L Lab Sample ID Client Sample ID <br />�alysis Date 06126/2001 15 46 Analyst DL 01060855-01A MW 5 <br /> 01060855-02A MW 6 <br /> 01060855-03A MW 10 <br />' - -- - ----- 01060855-0A MW 13 <br /> Analyte Result Rep Limit 01060855-055A MW 7 <br /> Gasoline Range drpanics NDI 0 050 <br /> Surr 1 4-Difluorobenzene 10131 62-1441 01060855-06A IW 1 <br /> Surr 4-Bromofluorobenzene Si 01 44-1531 01060855-07A MW 2 <br />' 01060855-OSA MW 9 <br /> 01060855-09A MW 4 <br /> 01060855-1OA RW 2 <br />' 01060855-13A MW 1 <br /> 01060855-14A MW 3 <br /> 01060855-15A MW 12 <br /> 01060855-17A UVB MW1 <br /> 01060855-18A UVB MW2 <br /> 01060855-19A V-1 <br /> 01060855-20A V-3 <br /> Laboratory Control Sample fLCS1 T <br /> RunlD VAR0_0105266-720644 Units mg1L <br />' Analysis Date 06/26/2001 15 20 Analyst DL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit 1 <br /> ,Gasoline Range Organics 1 11 0 86� 861 701 1301 <br /> ' Matrix Spike(MS1 1 Matrix Spike Duplicate MSD <br />' Sample Spiked 01060855-02 <br /> Runl❑ YARD 0106266-720646 Units mg/L <br /> Analysis Date 06/26/2001 17 26 Analyst OL <br /> Analyte Sample MS MS Result ! MS % i MSD MSD Result MSD% I RPD I RPD Low High <br /> Result Spike Recovery ,i Spike I Recovery i ; Limit, <br /> Limit Limit' <br /> —� — -- Added ' I Added f <br /> tolme Range Organics NDI 091 0 861 95 81 091 0 811 89 6701 361 36; 1601 <br /> Q*rs 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 Limits <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and 01060855 Page 27 <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 7/17101 2 3252 PAR <br />