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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 1 <br /> alysis Purgeable Aromatics WorkOrder 00080243 <br /> ethod SW8021B Lab Batch ID R18860 <br /> Method Blank Samples in Analytical Batch <br /> RunlD HP_U_000810A-366981 Units ug/L Lab Sample ID Cl tent Sample_ID_ <br /> Ialysis Date 08/10/2000 11 09 Analyst DL 00080243-OIA MW-4 <br /> 00080243-02A MW-5 <br /> 00080243-03A MW-6 <br />' 00080243-04A MW-7 <br /> Analyte Result Rep Limit <br /> Benzene 00080243-05A MW-8 <br /> ND a 50 <br /> Eth ibenzene ND 0 50 00080243-06A MW-9 <br /> Methyl tert-but 1 ether NO O 50 00080243-07A MW-10 <br /> Toluene — NO 050 00080243-08A MW-1 <br /> rn p-Xyiane ND 0 50 <br /> aXlane _ ND 050 00080243-09A VEW-1 <br /> IX lanes Total ND 050 <br /> Suri 1 4-D,I orobenzene J 977 72-137 <br /> _Surr 4-Bromotfuorobenzene 1042 48-156 <br /> Laboratory Control Sample(LCS} <br /> RunlD HP_U_000810A-366977 Units Ug/L <br /> Analysis Date 0811 012000 9 56 Analyst DL <br /> - - Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br />' Benzene --- �= 501 54 - - 1081--- 701-- —1301 <br /> Ethytbenzene 501 56 1111 70 1301 <br /> Methyl tert-butyl ether 501 48 971 70 130 <br /> Toluene - T SO 541 109 70 130 <br /> In p-Xylene 100 110 111 70 130 <br />' o-Xylene 50 55 110 70 130 <br /> 'Xylenes Total _ _ __ 150 165 110 70 130 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br />' Sample Spiked 00080245-02 <br /> RunlD HP_U_000810A-366984 Units ug/L <br /> Analysis Date 08/10/2000 11 47 Analyst DL <br /> Analyte Sample MS MS Result M5% MSD MSD Result MSD% RPD RPD f Low High <br /> Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added 1 Added <br /> Benzene ND 201 18 917 201 19 931 149 21 32 164 <br /> thylbenzene ND 201 1 960, 201 19i 95 8 0 223 19 52 142 <br /> ethyl tart-butyl ether 0 54 20L-- 16 78 9 201 181 856 8 14 20 39 150 <br /> lifiers NDIU-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 /> 00080243 Page 12 <br /> 821100 3 13 43 PM <br />