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' HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br />' HOUSTON TEXAS 77054 <br /> de o (T!3)660 0901 <br /> Quality Control Report <br />' EXXON Company U S A <br /> UP0137 1 <br /> Analysis Gasoline Range Organics WorkOrder 00120251 <br /> Method CA GRO Lab Batch ID R25984 <br /> Method Blank Samples in Analytical Batch <br /> RunlD HP_N_001211B-502542 Units mg/L Lab Sample ID Client Sample ID <br />'Analysis Date 12/11/2000 15 14 Analyst DL 00120251 01A MW-1 <br /> 00120251-02A MVV-2 <br /> 00120251-03A MW-3 <br /> A Result IIRep Limit <br /> 00120251-04A MW-4 <br /> Analyte <br /> --�__�—.___I__ _ <br /> ND' 6 0501 00120251-05A MW-5 <br /> Gasohne Range Organics <br /> Surr 1 4-Difluorobenzene ____ 96 0' 62144, 00120251-06A MW-6 <br /> Surr 4 Bromofluorobenzene 973 44 153 <br /> Laboratory Control Sample (LCS) <br /> RunlD HP—N-00121 15-502537 Units mg/L <br />' Analysis Date 1 211 112000 11 45 Analyst DL <br /> — _ Analyte Spike Result Percent Lower I Upper <br /> Added Recovery Limit 1 Limit <br /> Gasoline Range Organics — 1 0751 751 70; 130 <br /> Matrix Spike(MSLI Matrix Spike Duplicate MSD <br /> Sample Spiked 00120230-04 <br /> RunlD HP N 001211$502539 Units mg/L <br /> Analysis fate 12/11/2000 14 23 Analyst DL <br /> Analyte Sample MS I MS Result MS % MSD MSD Result MSD % RPD ' RPD I Low High I <br /> Result Spike ; Recovery j Spike Recovery I Limit? Limit Limit <br /> Added Added <br /> asoline Range Organics — — — NDI 091 —� 087 92 5� 09, 0 701 82 3'I 11 7' 36! 36; 1601 <br /> fiers ND/U--Not Detected at the Reporting Limit MI -Matrix Interference <br /> B-Analyto detected In the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J -Estimated value between MDI_and PQL .-Recovery Outside Advisable QC Limits <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and 00120251 Page 14 <br /> rounding the reported RPD may differ from the displayed RPD values but is correct as reported 12121/00 10 09 as AM <br />