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HOUSTON LABORATORY <br /> cr, SM INTERCHANGE DINE <br /> r+ousror►.rotas Tran <br /> ® (713)960.a901 <br /> Quality Control Report <br /> EXXON Company U S.A <br /> 00051712 <br /> Analysis Purgeable Aromatics WorkOrder 00050536 <br /> Method SW8021B Lab Batch ID R14357 <br /> Method Blank Samples in Analytical Batch <br /> RunID HP_R_000519A-286106 Units ug/L Lab Sample ID Client Sample ID <br /> Analysis Date 05/19/2000 14 16 Analyst DL 00050536-01A MW-1 <br />' 00050536-02A MW-4 <br /> 00050536-03A MW-5 <br /> 00050536-04A MW-6 <br /> Analyte — Result Rep Limit 00050536-05A MW-7 <br /> !Benzene ND 10 <br /> Eth (benzene — ND 10 <br /> 00050536 0$A MW-8 <br /> -- - — — <br /> Meth k tent-but ether ND 1 0 00050536-DTA MW-9 <br /> Toluene _ _ _— _ ND t 0 00050536-08A MW-10 <br />' mp-_Xylene == ND _— 10 <br /> �o- <br /> -Xylene NO 10 00050536-09A TB <br /> Xylenes Total _ _ _ NO 1 0 <br /> Surr 1 4 Difluorobenzene _ i 93 3 72-137 <br />' Surr 4 Bromofluorcbenzene l_ 991 48-156 <br /> Laborato Control Sample(LCS <br />' RunlD 1{P—R_000519A 286105 Units ug1L <br /> Analysis Date 05/19/2000 13 25 Analyst DL <br /> Analyte I Spike Result I Percent Lower Upper <br /> Added Recovery Limit Limit <br /> L3cnzc,n(, 50 56 112 70 130 <br />' Ethylbenzene 501 51 103 70 130 <br /> Methyl tort butyl r-ther 50 59 117 10 130 <br /> Toluene 501 52 103 70 130 <br />' m p-Xylene 100, 100 102 70 130 <br /> o Xylene 50, 52 103 /) 130 <br /> Xylenes Total 150 152 101 72 117 <br /> Matrix S ike MS !Matrix S ike Duplicate (MSl)) <br />' Sample Sp{ked 00050535 01 <br /> Elunlp Hl' R 000519A 266108 Units ug1L <br /> An-clysis Dalc 05/1912000 15 53 Analyst DL <br /> Analy to Sample MS MS Result i MS% MSD MSD Result MSD% RPD RPD Low High <br /> Result Spike Recovery Spike Rc cavery Limit Limit Lima <br />' Added Added <br /> Benzene ND 20 19 9741 20 20 101 346 ?1 32 1G; <br /> ,Ethylbenzene NDI 201 18 90 3� 20 18 909 0 700 19 52 142 <br /> (Methyl tent-butyk ether 66, 20 80 71 9� 20 83 84 7 163 20 39 150 <br /> Qualifiers 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 POL MI -Matrix Interterence <br /> 00050536 Page 17 <br /> 6111008-91 15 Ar+ <br />