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HOUSTON LABORATORY <br /> 8880 INTERCifANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> Q (713)66"901 <br /> Quality Control Report <br /> EXXON Company U S A. <br /> UP3942 1 <br /> knalysis Purgeable Aromatics WorkOrder 00090294 <br /> Method SWRO218 Lab Batch ID R21001 <br /> Method glank Samples in Analytical Batch <br /> tun(O 1-IP_N_000918A-407398 Units ug/L Lab SarntiLe LD Client Samnfe tU <br /> Inalysis Date 09/18!2000 15 27 Analyst DL 00090294-06A MW-2 <br /> 00090294-07A MW-4 <br /> 0009029410A MW-1 <br /> Analyte Result I Rep Limit 00090294-11A MW-3 <br /> 00090294-13A V-3 <br /> Benzene ND 0501 <br /> "Ibenzeno No 050ther NONa 050 ND D 50 <br /> c X lens ND 050 <br /> X ienes Total ND 050 <br /> Surr i 4-Dtfluornaa ene 924 72-137 <br /> Surr 4-l3romoll iorohenzene 14i 4 48-156 <br /> Laboratory Control Sample(LCS) <br /> RunlD HP_N 000918A-407397 Units ug1L <br /> Analysis Date 0911 W204014 09 Analyst 0L <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Benzene 50 5 108 70 130 <br /> Ethylbenzene 50 53 105 701 130 <br /> Methyl tert-butyl ether 50 50 100 70 130 <br /> Toluene 50 53 107 70 130 <br /> m,p-Xylene 100 110 106 70 130 <br /> o-Xylene 50 53 107 70 130 <br /> Xylenes,Total 150 163 1091 70 130 <br /> Matrix Spike(MSI!Matrix SQike Duplicate(MSD} <br /> Sample Spiked 00090399-01 <br /> RunlD HP N_000998A-407399 Unds ug/L <br /> Analysis Date 09/15/2000 1623 Analyst DL <br /> Analyte Sample Resuit MS MS Result MS% MSD MSO Result MSD% RPD RPD Low High <br /> Spike Recovery Spike Recovery Limit Umit Limit <br /> Added Added <br /> lens NO 20 17 83 7 20 19 949, 126 21 32 164 <br /> enzene NDI 201 161 802 20 19 92 8 14 6 19 52 142 <br /> tett-butyl ether 58 20 66 41 9 20 71 65 8 44 2' 20 39 150 <br /> lWers NO/U- Not Detected at the Reporting Limit "-Recovery Outside Advisable QC Limits <br /> ieB-Analyte detected in the associated Method Blank 0-Recovery Unreportable due to Dilution <br /> J-Estimated value between MDL and PQL MI-Matrix Interference <br /> gal 1001 43 52 PM <br />