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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ' ® HOUSTON TEXAS 77054 <br /> Quailty Control Report (713)660 0901 <br /> ' EXXON Company U S A <br /> UP3708 1 <br /> Analysts Purgeable Aromatics <br /> ethod SW8021B WorkOrder 01050390 <br /> etho Lab Batch ID R35593 <br /> M-----d 8far?k Samples in Analytical Batch <br /> RunEC) VARE_010519A 678023 Units ug/1- <br /> nal sis Date Lab S— ample ID Client Sample ID <br /> Y 05/1912001 3 03 Analyst DL <br /> 01050390-DIA MVV-1 <br /> -, -- Analyte Result Rep Limit' <br /> Benzene _- _- _ _ ND 0.50 <br /> Eth (benzene - _ _ ND 050 <br /> Toluene ___ ND50I <br /> ' m P Xylene - _- -- - _ J- ND 0 50 <br /> o-X lene _ ND, 0 50' <br /> XYienes 7ota1 __- _ --_ - N 0 50 <br /> Sum 1 4-Diflucrobenzene _ _ _ 91 61 72-137 <br /> Surr 4-Br0moftucrobenzene 905, 48-156 <br /> Laboratory Control Sample(LCS) <br />' Run1D JARE_310519A 678022 Units ug/L <br /> Analysis Date 05/19/2001 2 15 Analyst DL <br /> • Analyte Spike Result Percent Lower U <br /> Pper <br /> Added <br /> - _ - Recovery Lemit Limit <br /> Benzene_ - - 50_ 55 109_ 701 130 <br /> Ethylbenzene - - - - - - 50 - 54 109_ 70' 130 <br /> Toluene 5Q1 54 107701 - <br /> _ 130 <br /> m __ _ __ _ _p Xylene _ 1001 110 -- 107 70' <br /> _ 130 <br /> a-Xylene - - - - _ - --50 - 54 - 109 70' _130 <br /> Xylenes Total - _ 150_ 164 109 70 130 <br /> ihliatnx S ike MS !Matrix 5 tke i)u licate MSD <br /> Sample Spiked 01050354-04 <br />' RunID VARE_010519A-678024 Units uglL <br /> Analysis Date 05/19/2001 3 27 Analyst DL <br /> Analyte Sample MS ; MS Result MS % MS❑ MSD Result MSO RPD RPD Low High <br /> Result Spike Recovery Spike Recovery9 <br /> T Added Added Limit Lima , Limit <br /> enzene - -L -1_ - -- <br /> - NDi 20' 2a 102 20 — - 20' 1a�0521 21 32 —164 <br /> thylbenzene NC]1 T 2Q -- - - --- ----_- <br /> --- -- -- _ _ _ 20 102 2200 20 101 07401 19 52 142 <br /> Toluene -- - _ ND' 20 20 100 ~201 <br /> p-Xylene -- - - -- -- - -_ 20 101 1 08 20 38' 1591 <br /> - _ - ND' 40 41" 102 40 40 - 1001 1 981 17 531 944 <br /> -Xylene - ND 201 20 - - ---- - - - _- <br /> --— -T 102 - 20f 20 102 0 280 8 �53 143 <br /> leis ND/U -Not Detected at the Reporting Limit MI -Matnx Interterence - <br /> B -Analyte eetected in the associated Method Blank D Recovery Unreportable due to Dilution <br /> J - Estimated value between MOL and PQL <br /> ' Recovery Outside Advisable QC Limits <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and <br /> rounding, the reported RPO may differ from the displayed RPD values but 1s correct as reported )I 05G390 Page <br /> 523101 6 18 12 Aivl <br />