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HOUSTON LABORATORY <br /> E8601NTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ® (713)660-0901 <br /> Quality Control Report <br /> EXXON Company U S.A <br /> Analysis Purgeable Aromatics WorkOrder 00050532 <br /> ethod SW8021B Lab Batch iD R14433 <br /> Method Blank Samples in Analytical Batch <br /> RUnID HP_U 0005223-287698 Units ug1L Lab Sample ID Client Sample l_D <br /> Inalysis Date 05!22/200010 05 Analyst WR 00050532-01A MW-2 <br /> 00050532-02A MW-4 <br /> 00050532-03A MW-5 <br /> 00050532-04A MW-6 <br /> Analyte Result Rep Limit <br /> Benzene ND 10 00050532-05A MW-7 <br /> Ethylbenzene _ ND 10 00050532-06A IW-1 <br /> MethYl tort-butvi ether ND 10 00050532-07A RW-1 <br /> Toluene ND 10 00050532-08A RW-2 <br /> m -X lene ND 1 0 <br /> 2-Xylene ND 10 00050532-09A RW-4 <br /> Xylenes Total NDJ 10 00050532-10A UVBMW-1 <br /> Surr 1 4-0ifluorobenzene 1000 72-137 00050532-11A UVBMW-2 <br /> Surr 4-8romofluorobenzene 10251 48-156 <br /> 00050532-12A TB <br /> Laboratory Control Sample(LCS) <br /> RunlD HP_U_000522B-287697 Units ug/L. <br /> Analysis Date 05/22/2000 9 35 Analyst WR <br /> Analyte Spike Result Percent Lower i Upper <br /> Added Recovery Limit Limit <br /> IBenzene - - _ - 50__55 ill 701 1301 <br /> IEthylbenzene 50 _ 56112 70, 1301 <br /> Methyl tert-butyl ether 50 53 10-6-{1 701 130; <br /> Toluene-- --— - l 501 55I 1101 70 130 <br /> 9m p-Xylene 1001 110, 112 70 130 <br /> lo-Xylene 501 561 ill, 70 130 <br /> !Xylenes Total 1501 166 111 72 117 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 00050457 08 <br /> RunlD HP_U_000522B 287701 Units ug/L <br /> Analysis Dale 05/22/2000 15 55 Analyst WR <br /> Analyte Sample MS MS Result 1 MS% I MSD MSD Result MSD% RPD RPD Low High <br />�i Result Spike I Recovery Spike Recovery Lima Limit Limit <br /> 1 Added lAdded <br /> IBenzene — —_- __ ND 20 231 1121 20, 24 117, 489 21 32 154 <br /> �Ethylbenzene ND 20 221 1121 20 24 1171 503, 19 521 142 <br /> ualifiers 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 Mi-Matrix Interference <br /> 00050532 Page 15 <br /> G1v00 9 00 50 AM <br />