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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> ® HOUSTON TX 77054 <br /> Quality Control Report (713)660-4901 <br /> EXXON Company U S A A <br /> UP3942 1 <br /> Inalysis Purgeable Aromatics WorkOrder 01120303 <br /> Method SW80218 Lab Batch 1D R49869 <br /> Method Blank Samples in Analytical Batch <br /> LID HP_U_011215A-950148 Units ug/L Lab Sample ID Client Sample ID <br /> lnalysis Date 12/15/2001 16 28 Analyst DL 01120303-01A MW 2 <br /> 01120303-02A MW 3 <br /> 01120303-03A MW 4 <br />' Analyte Result Rep L1mrt1 <br /> 01120303-04A MW 5 <br /> Benzene NDI 0 501 01120303-05A RW 2 <br /> Eth (benzene ! NDI 0 50 01120303-C6A RW 4 <br /> Toluene NDI 0 501 01120303-07A IW 1 <br /> m -X !ane NDI 0501' <br /> 10-X fene ND 0501 01120303-11A UVB MW2 <br /> X lens Totaf NE)j 0501 <br /> Surr 1 4-Difluorobenzene 1 9191 72-130, <br /> 1 Surr 4-Bromofluorobenzene 10081 70-1301 <br /> Laboratory Control Sample(LCS) <br /> Run1D HP—U-01 1215A-950168 Units ug/L <br /> Analysis Date 12/15/2001 16 53 Analyst OL <br /> SAnalyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Benzene - 1 501 531 1051 701 1301 <br /> Ethylbenzene, 501 511 103! 701 1301 <br /> Toluene 501 531 1061 70 130 <br /> 1m p-Xylene 100 100 1031 701 130 <br /> la-Xylene 1 501 521 1041 701 1301 <br /> 1Xylenes,Total 1 1501 152 1011 701 130 <br /> Matrix Spike MS I Matrix-Spike Duplicate MSD <br /> Sample Spiked 01120200-01 <br /> RunfD HP_U_011215A-950150 Units ug/L.' Analysis Date 12/15/2001 17 18 Analyst OL <br /> Analyte Sampie MS MS Result , MS % 1 MSD I MSD Result MSD % 1 RPD RPD Low High <br /> Result Spike Recovery ' Spike Recovery , Limit Limit Limit <br /> Added ( Added <br /> zene NDI 201 211 104 20 201 1021 2011 211-32 1641 <br /> ylbenzene NDI 201 201 99 5 201 191 96 91 2 561 191 52�14 1 <br />,ene NDI 201 211 105 20 201 1011 3 211 201 381 1591 <br /> qualifiers ND/U -Not Detected at the Reporting Limit MI -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 /> je,percent 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 121191013 40 09 PM <br />