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' HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON TX 77054 <br /> Quality Control Report (713)660-0901 <br /> EXXON Company U S A <br /> U p3708 1 <br /> Inalysis Volatile Organics by Method 82608 WorkOrder 01110955 <br /> Method SW8260B Lab Batch ID 848843 <br /> Method Blank Samples in Analytical Batch <br /> RunlD N_011129B 930457 Units ug/L Lab Sample Ila Client Sample ID <br /> Analysis Date 1113012001 3 58 Analyst JC 01110955-086 MW10 <br /> 011 10955-09B VEW 1 <br /> Analyte Result _Rep Limit <br />' Benzene _ - -- NO 050 <br /> Dilsopropyl Ether ND 10. <br /> Ethxlbenzene _ NO 050 <br /> Methyl tert-butyl ether _ T NO 50 <br />' t-Butyl alcohol NO 50 <br /> tert Amyl meshy!ether NO 10 <br /> tert Bu ethyl ether NO 10, <br /> Toluene ND 0 50, <br />' Xylenes Total NO 0501 <br /> Suri 1 2 Dichloroethane-d4 90 0, 62-130-130 <br /> Surr 4-Bromofluorobenzene 88 0' 70-130 <br /> Sum Toluene-d8 8401 74-122 <br /> Laboratory Control Sample(LCS) <br /> RunIO N_01 11296-930455 Units uglL <br /> 10 Analysis Date 11/30/2001 3 04 Analyst JC <br /> Analyte I Spike Result Percent Lower I Upper <br /> Added Recovery Limit I Limit <br /> 1 1-Dichlaroethene 50 391 78 61 145 <br /> Benzene 50 47 941 76 127 <br /> Chlorobenzene 501 451 gol 751 1301 <br /> Toluene 50 441 881 76 125 <br /> Tnchioroethene 50' 44� 88 71 120 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01110955-09 <br /> RunlD N_01 1 1 296-930460 Units uglL <br /> Anaiysis Date 11/30/2001 7 45 Analyst JC <br /> Analyte Sample MS MS Result MS % MSD MSD Result MSD% RPD RPD Low High <br /> Result Spike Recovery Spike Recovery Limit Limit Limit <br /> Added Added <br /> 1 Dichlorpethene � NO 901 501 100 50 46 92 0 8 14 38� 172 <br /> Qualifiers NDIU-Not Detected at the Reporting Limit MI -Matrix 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 /> To,11,nt recoveries for QC samples are correct as reported Due to significant figures and <br />'rounding the reported RPD may differ from the displayed RPO values but is correct as reported 17110101 9 04 22 AM <br />