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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRWE <br />' HOUSTON TEXAS 77054 <br /> ® <br /> J7131660-0901 <br /> . Quality Control Report <br />' <br /> EXXON Company U S A <br /> UP3942 1 <br /> Analysis Gasoline Range Organics WorkOrder 01030308 <br /> Method CA GRO Lab Batch ID 831568 <br /> Method Blank Samples in Analytical Batch <br /> RunID VARE�0103156-603934 Units mg/L <br /> Lab Sample ID Client Sample 11) <br /> Analysis Date 03/15/2001 15 08 Analyst D_R 01030308-16A RW-1 <br /> 01030308-17A RW-2 <br /> 01030308-21A IW-1 <br />' Analyte Result Rep Limit <br /> Gaseline Range Organics NDI 0 050 <br /> Surr 1 4-aifluarobenzene 10471 62 144 <br /> Surr 4-6rornafluorobenzene 116 7 44-153 <br /> LaboratoryControl Sample_(LCS) <br /> RunlD VARE_0103158-603933 Units mglL <br /> IAnalysis Date 03/15/2001 1444 Analyst D_R <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Gasoline Range Organics i 1 1 1081 701 130 <br /> Matrix Spike(MS)1 Matrix Spike Duplicate(MSD) <br /> Sample Spiked 01030309-02 <br /> RunlD VARE_0103158-603935 Units mg/L. <br /> Analysis Date 03/15/2001 16 21 Analyst D_R <br /> Analyte Sample MS MS Result MS% MSD MSD Result MSD% RPD I RPD Low High <br /> Result Spike Recovery Spike Recovery I Limit Limit Limit <br /> Added Added I I I <br /> asoline Range Organics NDI 091 0 98 109 091 11 114 4 261 361 36� 1601 <br /> I <br /> I <br /> Iiflers ND/U-Nat getected at the Reporting Limit MI -Matnx Interference <br /> B-Analyte detected m the associated Mekhod Blank D-Recovery Unreportable due to Dilution <br /> J -Estimated value between MDL and PQL "-Recovery Outside Advisable QC Limits <br /> The percent recoveries for QC samples are correct as reported Due to significant figures and 01030308 Page 30 <br /> rounding,the reported RPD may differ from the displayed RPD values but is correct as reported 13/2110110 24 04 AM <br /> I <br />