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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> J HOUSTON TX 77054 <br /> Quality Control Report (713)660-0901 <br /> EXXON Company U S A - <br /> UP3T08 1 <br /> Analysis Purgeable Aromatics WorkOrder 01110955 <br /> Method SW80218 Lab Batch ID R48881 <br /> Method Blank Samples in Analytical Hatch <br /> LID VARE_011201A-931357 Units ugJL Lab Sample ID Client Sample ID <br /> Analysis Date 1210112001 20 33 Analyst DL 01110955-07A MW9 <br /> 1 01110955-08A M W 10 <br /> Analyte _Result 'Rep Limit <br /> Benzene _—_-_--_- - — - ND 0 50y <br /> Ethylhenzene i�l� fl 50 <br /> Toluene, A__ ND 650 <br />' o-X lene ND _ 050 <br /> Xylenes Total ND 050 <br /> Surr l 4-Difiuorobenzeae 997 72-130 <br /> Sum t-Bromofluorobenzene 860 70-130 <br /> Laboratory Control Sample LCS <br /> RunlD VARE_011201A-931354 Units ug/L <br />' Analysis Date 12/01/2001 17 37 Analyst DL <br /> Analyte — Spoke Result Percent 1 Lower rUpper <br /> Added Recovery Limit I Limit <br /> Benzene 500 53 105 701 130 <br /> Ethylbenzene 50 53 105 701 130 <br /> Toluene 501 53 106 70 130, <br /> m p-Xylene 1001 100 104 701 130 <br /> o-Xylene 501 52` 104, 70' 130 <br /> Xylenes Total 1501 1521 101 70, 1301 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Sp:ked 01111102-01 <br /> RunlD VARE_011201A 931355 Units ug1L <br /> Analysis Date 12!0112001 18 54 Analyst DL <br /> _ _ I <br /> Analyte Sample MS MS Result MS % MSD MSD Result MSD % RPD RPD Low High <br />' Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> 3enzene -- �—�— 13, 20 20, 958 20r- -- 19 877 885 21 321 164 <br /> hylbenzene -` - � ND 20 191 934 201 17 854 901 19� 521 142 <br /> luene ND, 20 �191 <br /> 937-201 17 856 910 20 381 1591 <br /> Qualifiers 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 value between MDL and PQL *-Recovery Outside Advisable CC 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 12/10101 90228 AM <br />