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',= M-- HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TX 77054 <br /> 4 - Quality Control Report (713)660-0901 <br /> EXXON Company U S A <br /> U P 3708 1 <br /> Lalysis Purgeable Aromatics WorkOrder 01110955 <br /> Method SW8021B Lab Batch ID R48897 <br /> Method Blank Samples in Analytical Batch <br /> LID VARD_011201A-931731 Units uglL Lab Sample ID Client Sample 11) <br /> _„ <br /> Analysis Date 12701/2001 13 27 Analyst D_R 01110955-01A MW1 <br />' <br /> 011 10955-02A MW4 <br /> 01 1 1 0955-03A M W 5 <br /> F - 01110955-04A MW6 <br /> Analyte T Result Rep Limit 01110955-05A MW7 <br />' Ben —zene _ _ i� ND 050 <br /> Et_hyl_benzene ND 050 <br /> Toluene _ _ ND 050 <br /> m�Xylene —NO <br /> _ 050 <br />' o:2�ylene ND_ 050 <br /> Xy$enesTotal ND 050 <br /> Surr 1,4-Difluorobenzene _ 911 72-1301 <br /> Surr 4Bromofluarobenzene 873 70-130 <br /> Laboratory Control Sample(LCS) <br /> RunlD VARD_011201A-931730 Units uglL <br />' Analysis Date 1210112001 12 37 Analyst D_R <br /> — Analyte-- Spike Result Percent Lower Upper <br /> Added I Recovery Limit Limit <br /> Benzene 50 57 114 70 130 <br /> Ethylbenzene 50 581 115 70 � 130' <br /> Toluene 50 57 114, 70 130' <br /> m,p-Xylene 100 110, 114 70 130, <br /> o-Xylene 50, 58 115 7& 130 <br />' Xylenes Total 150 _ 1681 112 701 130; <br /> I Matrix Spike IMS)!Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01110879-03 <br /> RunlD VARD_011201A 931732 Units ug/L <br />' Analysis [Date 12/01/2001 13 52 Analyst D_R <br /> Analyte Sample MS MS Result MS % MSD MSD Result MSD % RPD RPD Low High <br /> I Result Spike Recovery Spike Recovery Limit Limit i Limit <br /> Added Added <br /> 3enzene - -- ---Y - - ND 20 25 125 201 25 125,C) 207 21 32 164 <br /> ty)benzene ---- ND 20 251 127 201 25, 127 0 676 191 52 142 <br /> uene ---� ND 20 24 121 201 24 122 123 201 38 159 <br /> ualifiers ND/U-Not Detected at the Reporting Limit Ml-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 /> T rcent recoveries for QC samples are correct as reported Due to significant figures and <br />�ounding the reported RPD may differ from the displayed RPD values but is correct as reported 12110101 9 03 00 AM <br /> I <br />