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' HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TX 77054 <br /> Quality Control Repan (713?660-fl901 <br /> EXXON Company U S A <br /> UP3748 1 <br /> Inalysis Volatile Organics by Method 8260B WorkOrder 01110955 <br /> Method SW8260B Lab Batch ID 848840 <br /> Method Blank Samples in Analytical Batch <br /> PunlD N-011129A 930429 Units ug1L Lab Sample ID Cllent Sample ID <br /> naiysis Date 11/29/2001 13 05 Analyst JC 01110955-028 MW4 <br /> 01110955-038 MW 5 <br /> 01110955-04B M W 6 <br /> -- -- - - _ - 01140955-06B MW8 <br /> Analyte Result Rep Limit <br /> Methyl tett-buts!ether LL_ ND 5 0 01114955 07B MW9 <br /> 5urr 1 2-01chleroethan_e d4 920 _62-130 <br /> Surr 4-Bromofluorobe_nzene 860 70-130 <br /> Surr 76uene-d8 _- 860 74-122 <br /> Laboratory Control Sample(LC§j <br /> RunlD N-011129A 930428 Units ug/L <br /> Analysis Date 11/29/2001 12 12 Analyst JC <br /> Analyte Spike Result Percent i Lower Upper <br /> Added IRecovery Limit Limit <br /> 1,1-Dichloroethene 50 42 84 61 145 <br /> Benzene 50 T 4 92 - 7 127 <br /> Chlorabenzene 50 444', 88 755 130 <br /> Toluene 50 44 88 76 125 <br /> Trich€oroethene 50 441 88 71 120 <br /> 1 <br /> Matrix Spike M5 I Matrix Spike Euplicate MSO <br />' Sample Spiked 01110879-10 <br /> Run1D N-011129A-930433 Units ug/L <br /> Anaiysis Date 11/29/2001 14 53 Analyst JC <br /> Analyte Sample MS MS Result MS% MSD MSD Result MSD % RPD RPD Low High <br />' Result Spike Recovery Spike Recovery Limit LimitLimit <br /> Added Added <br /> 1-Dichloroethene NO 12500 IG0001 80 12500 9300 744 7 14 3838172 <br /> zene ND 12500, 130001 97 12500 12000 889 91 11 66 134 <br /> lorobenzene ND 12500 12000, 96 12500 12000 9601 0 13 67 115. <br /> Toluene NO 12500 12000 96 125001 11000 880 9 13 59, 125 <br /> hloroethene- 12000 96 12500 100NO 12500. � 0—� <br /> 00 i 800, 18* 14 61 134. <br /> -- - <br /> ualifiers NDIU -Not Detected at the Reporting Limit Ml -Matnx Interference <br /> B-Analyte detected in the associated Method Blank D -Recovery Unreportable due to Dilution <br /> J - Estimated value between MDL and PQL `- Recovery Outside Advisable QC Limits <br /> th,011cent recoveries for QC samples are correct as reported Due to significant figures and <br /> unding, the reported RPD may differ from the displayed RPD values but is correct as reported 1211 0101 9 04 06 AM <br />