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' HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TEXAS 77054 <br /> (713)660 0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3708 <br /> Analysis PUrgeable Aromatics WorkOrder 00110263 <br /> Method SWB021B Lab Batch ID R24386 <br /> Method Blank Samples in Analytical Batch <br /> RunlD -iP_1J_701t10A A'0345 Units ug/L Lab Sample ID Client Sample tD <br />�nalysis Date 1 1,1012000 9 45 Analyst DL 00110263-01A MW-1 <br /> 00110263-02A MVV-4 <br /> 00110263-03A MVV-5 <br /> - - - 00110263-04A MW-6 <br /> Analyte Result Rep Limit <br /> 00110263-05A MW-7 <br /> Benzene ND 0 50' <br /> EthyLbenzene ND; _ 750 00110263-06A MW-8 <br /> vlethyl teril-butyl ether ND 050 00110263-07A MW-9 <br /> Toluene -ND, -- 050 00110263-08A MW-10 <br /> rn p Xylene ND 0 501 <br /> n Xylene ND 0 501 <br /> `Cylenes Tatal NDi 050 <br /> Surr 1 4-,Ditlucrobenzene 9791 _72 137 <br /> Suri4-BromofluarohenzenP _ _ _ 98 0' 48 158 <br /> Laboratory Control Sample (LCS) <br /> RunlD r P_J201110A--A70344 Units uglL <br /> Analysis Date 11 1012000 S 55 Analyst DL <br /> analyte Spike Result Percent Lower Jpper <br /> added Recovery Limit Limit <br /> Denzene 50 501 101 70 130 <br /> Ethylbenzene 50 53 105 701 130 <br /> Methyl ter?-butyl ether 50 46 93, 70, 136 <br /> Toluene -- -- - - 50 52 1031 ---70 -- 1301 <br /> m p-Xylene 100 1101 _ 1051 -70' 130 <br /> o-Xylene 50 52' 103- 701 1301 <br /> Xylenes Total 150 162 108 701 1301 <br /> Matrix Spike (MS)I Matrix Spike Duplicate(MSD} <br /> Sample Spiked 00110271-01 <br /> Rul HP—U_00111oA-470366 Units ug/L <br /> Analysis Date 11/10/2000 23 06 Analyst DL <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 /> lenzene 079, 20 15 73 0 20 16 7761 6 10 21 321 164 <br />&hy#benzene ND 20 14 71 81 20 151 767 6621 19 52E 142 <br /> ethyl tart-butyl ether ND 20 16 81 01 20 161 80 51 0 5841 20, 39E 150 <br /> fters <br /> ND/LJ Not Detected at the Reporting Limit '-Recovery Outside Advisable QC Limits <br /> 8 -Analyte detected in the assocated Method Blank D -Recovery Unreportable due to Dilution <br /> J - Estimated value between MDL and PQL W - Matrix Interference <br /> 00110263 Page 10 <br />' 1 1!21 m 8 28 40 AM <br />