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' HOUSTON LABORATORY <br /> t;HO antRHOUSTON. <br /> TEXAS <br /> DRIVE <br /> 7054 <br /> Li0UST01'l,TE7CAS 77054 <br /> � (713}860-09D1 <br /> Quality Control Report <br /> EXXON Company U S A <br /> 000229-K1 <br /> Analysis Purgeable Aromatics WorkOrder 00030103 <br />'Method SW8021B Lab Batch ID 810253 <br /> Method Blank Samples In Analytical Batch <br /> RunlD HP J_000307A-211578 Units ug/L Lab Sample tD Client Sample ID <br /> Analysis Date 03/07/2000 18 01 Analyst CJ 00030103-12A RW-1 <br /> 00030103-13A RW-2 <br /> 00030103-15A UVBMW-2 <br />' — Analyte Result Rep Limit <br /> Benzene ND 10 <br /> IEbenzene �_ _ ND 10 <br /> Methten-but ether _ ND 10 <br />' Toluenem — ND 10 <br /> Xylene — ND 10 <br /> o-Xviene ND 10 <br /> genes Total ND 1 0 <br /> 1,4-Difluorobenzene 95 8 72-137 <br /> !_Surr 4 Bromofiuorot>enzene 96 7 48-158 <br /> LaboratorV Control Sample LCS <br /> RunlD HP_J_000307A-211575 Units ug/L <br /> Analysis Date 03/07/2000 15 15 Analyst CJ <br /> Analyte Spike Result Percent Lower Upper <br /> I <br /> Added Recovery Limit Limit <br /> Benzene � 50�-- 54- 108 v 61 119 <br /> IEthylbenzene 50' 52 104 70 118 <br /> Methyl tert-butyl ether 50r 54 109 72 128 <br />' Toluene —-- ---- ---50 54 ---- 107 65 ---125 <br /> m p-Xylene 1001 110� 106 72 116 <br /> o-Xylene 50' 52 104 72 117 <br /> 1Xylenes Total 150 162 108 72_ 117 <br /> Matrix Spike(MS)/Matrix Spike Duplicate(MSD) <br />' Sample Spiked 00030103-13 <br /> RunlD HP-J 000307A 211576 Units ug/L <br /> Analysis Date 03/07/2000 16 11 Analyst CJ <br /> Analyte - Sample MS MS Result 1 MS% MSD MSD Result MSD°/a RPD RPD tow High <br /> Result Spike I Recovery Spike Recovery Limit Limit Limit <br /> Added I Added <br /> i <br /> Benzene — 17 20 431 131 _ 20 43 131 0 498 21 32 1- <br /> `Ethylbenzene - y----- 1 281 20 4 I7 952 20 46 91 2 428 19 521 142 <br /> Methyl lert_butyl ether— ND 2D 39� 193` 20 39 19T 2 10E2L39� 150'iene 4 5 20 33 142 20 31 134 58236 159 <br /> 'qWualitiers ND/U-Not Detected at the Reporting Limit '-Recovery Outside Advisable QC Limits <br />' B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL <br /> 3116100 2 46 02 Pt-1 <br />