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HOUSTON LABORIATORY <br /> DRIVE <br /> 6880 INTERCHANGE DRIVE <br /> O HOUSTON TEXAS 77054 <br /> a {713}660-0901 <br /> . Quality Control Report <br /> EXXON Company U S A <br /> UP3942 1 <br /> Analysts Volatile Organics by Method 8260B WorkOrder 01060855 <br /> 11 ethod SW8260B Lab Batch 10 R38174 <br /> Method Blank Samples in Analytical Batch <br /> RuntD L_010701A-726543 Units uglL Lab Sample ID Client Sample ID <br />�nalysis Date 07/01/2001 10 57 Analyst JC 01060855-10B RW 2 <br /> 01060855-11B RW 1 <br /> 01060855-12B MW 8 <br /> — — 01060$55-166 RW 4 <br /> Analyte Result Rep Limit <br /> fvtethyl cert-butyl ether _ �ND _ 5 01 <br /> _ Surr 1 2-0ichloroethane-d4 1 960E 62-119 <br /> Surr 4-9rcmotluorobenzene 1 9001 78-1231 <br /> Surr Toluene-t8 98 01 74-1221 <br /> Laborato Control Sample LCS <br /> RunlD L_010701A-726541 Units ug/L <br /> Analysis Date 07/01/2001 10 01 Analyst JC <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> 11,1-Dichioroethene 50 501 1001 611 145 <br /> Benzene 501 441 881 761 127 <br /> ,Chlorobenzene 501 45 901 7$1 130 <br /> ,Toluene 501 451 901 761 1251 <br /> Tnchloroethene _ 501 441 881 71 1201 <br /> Matrix Spike MS /Matrix Spike Duplicate MSD <br /> Sample Spiked 01060706-03 <br /> RunID L_010701A-726559 Units uglL <br /> Analysis Date 07/01/2001 14 01 Analyst JC <br /> Anaiyte Sample MS MS Result I MS% 1 MSD MSD Result MSD% RPD f RPD Low High <br /> Result Spike I Recovery I Spike Recovery I Limit I Limit Limit <br /> Added Added 1 I <br /> 1-Dichloroethene ND1 12501 1300 104 1250 1300 104[ 01 141 38� 1721 <br /> lnzene I 7701 12501 20001 98 1250 2000 981 0 111 661 1341 <br /> Jorobenzene N01 12501 11001 88 1250 121 96 91 131 671 1151 <br /> oluene2101 12501 13001 87 1250 14001 951 9f 131 591 1251 <br /> hloroethene� NDI 12501 11001 88 1250 11001 881 0 141 611 1341 <br /> Q*rs NDlU 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 vatue between MDL and PQL '-Recovery Outside Advisable QC Limits <br /> 1he percent recoveries for QC samples are correct as reported Due to significant figures and 01060855 Page 31 <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 7/17101 234 02 PM <br />