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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> ® (713)660A901 <br /> . Quality Control Report <br /> EXXON Company U S A <br /> uP3sa21 <br /> trialysis Purgeable Aromatics WorkOrder 01060855 <br /> Method SW8021B Lab Batch ID R37943 <br /> Method Blank Samples in Analyt[cai Batch <br /> LID VARD_010627A-721640 Units ug/L Lab Sample IQ Client Sample 10 <br /> nalysls Date 06127/2001 12 05 Analyst DL 01060855-10A RW 2 <br /> 01060855-11A RW 1 <br /> 01060855-12A MW 8 <br /> - 01060855-13A MW 1 <br /> Analyte _ --- Result Rep Limitl 01060855-16A RW 4 <br /> Benzene ND1 0 501 <br /> Ethylbenzene _ NO' 0 501 <br /> Methyl tert-buty_i ether NDi 0 501 <br />' Toluene _ _ — NO 0 501 <br /> m p-XXIene _ NO 0 501 <br /> o-Xylene NDi 050 <br /> genes Total _ NDI 050 <br /> Surr 1 4-0ifluorobenzene _ _ ^I 9531 72-1371 <br /> Surr 4-Bromofluorobenzene 9391 48-1561 <br /> Laborato Contra] Sample LCS <br /> RunlD VARD_010627A-721639 Units ug/L <br /> Analysis Date 06/27/2001 11 15 Analyst DL <br /> I. Analyte Spike Result Percent Lower Upper <br /> 1 Added Recovery Limit Limit I <br /> Benzene 501 471 94 701 130 <br /> IEthyibenzene 50 481 96 701 130 <br /> Methyl tert-butyl ether 501 461 92 70� 1301 <br /> iToluene 501 47 941 70 130 <br /> m p-Xylene ` _ m _ I 1001 931 931 70 1301 <br /> o-Xylene 501 481 96I 70I 1301 <br /> Xylenes Total 1 1501 1411 94I 701 1301 <br /> Matrix Spike{IDIS}1 Matrix Spike Duplicate(MS01 <br />' Sample Spiked 01060772-01 <br /> RUnID VARD 010627A-721641 Units ug/L <br /> Analysis Date 06/27/2001 12 31 Analyst DL <br /> Analyte Sample MS MS Result MS% 1 MSD ' MSD Result MSD% 1 RPD I RPD Law High <br /> Result Spike I I Recovery I Spike Recovery Limit Limit I Limit <br /> Added Added 1 i <br /> Inzene -- �— NDI 201 161 775 20 161 78 11 0 779} 211 321 1641 <br /> thylbenzene NDI 201 141 71 2 20 141 71 61 0 6371 191 521 1421 <br /> thy] tert bu#yl #her 171 201 321 740 20 33 77 3� 4 391 201 391 1501 <br /> vers ND/U-Not Detected at the Reporting Limit MI - Matrix Interference <br /> B-Analyte detected In the associated Method Blank D-Recovery Unreportabie due to Dilution <br /> J-Estimated value between MDL and PQL "-Recovery Outside Advisable QC Limits <br /> he percent recoveries for QC samples are correct as reported Due to significant figures and 01060855 Page 28 <br /> rounding the reported RPD may differ from the displayed RPD vaiues but is correct as reported 7117101 z 33 12 PM <br />