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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> .ZM: -5A Co-� HOUSTON TX 77054 <br /> 10Quality Control Report (713)660-0901 <br /> v EXXON Company U S A <br /> U P3708 1 <br /> clysis Volatile Organics by Method 82608 WorkOrder 01110955 <br /> Method SW8260B Lab Batch ID R49080 <br /> Method Blank Samples to Analytical Batch <br /> LID K01120313-934983 Units ug]L Lab Sample ID Client Sample ID <br /> Analysis Date 12/04/2001 5 12 Analyst JN 01110955-01B MW1 <br /> Analyte Result Rep Limit <br />' Methyl tert-butyl ether NO 50 <br /> _ Surr 1 2-D,chloreethane-d4_ 1140 62 130 <br /> Surr 4-Brom_oflucrobe_nzene 1000_ 70-130 <br /> Surr Toluene-d8 1000 74-122 <br /> Laboratory Control Sam le LCS <br /> RunlD K 01120313-934982 Units uglL <br />' Analysis Date 12/04/2001 4 14 Analyst JN <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> 1,1-Dichloroethene 50 46 92' 61 145 <br /> Benzene 50 56 112 76, 127 <br /> Chlarobenzene 50 601 120 755 130 <br /> Toluene 50 56 112 76 125 <br /> Trichloroethene 50. 581 1161 71 1203 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01110955-01 <br /> RunlD K-01 1203B 934986 Units ug/L <br /> Analysis Date 12/04/2001 6 38 Analyst JN <br /> Analyte Sample MS MS Result MS% MSD MSD Result MSD % RPD RPD Low IHih <br /> ResultSpike Recovery Spike Recovery Limit Limit Limit <br />' Added Added <br /> l 1-Oichloraethene ND 1250 1200 96 1250 12001 96 0, 11 14 38 172 <br /> nzne ND 1250 1400, 112 1250 15001 120 20` 111 66 134 <br /> nNDi 12501 15001 120 ' 1250 1600 128` 33` 13. 67' 115 <br /> j,1,.robez.ne <br /> ene ND 1250 1400, 112 1250 15001 120 29" 131 59, 125 <br /> chloroethene ND 1250 15001 120 1250 1500 120 26 ' 14 61 134 <br /> uahfiers� ND/U -Not Detected at the Reporting Limit Ml -Matrix Interference <br /> B -Analyte detected ,n the associated Method Blank D- Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PQL ' -Recovery Outside Advisable QC Limits <br /> Th rcent recoveries for QC sampfes 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 1211(y019 04 56 AM <br />