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HOUSTON LABORATORY <br /> 8880 INTERCHANGE DRIVE <br /> HOUSTON,TEXAS 77054 <br /> ® (713)660-0901 <br /> Quality Control Report <br /> EXXON Company U S A <br /> UP3708 1 <br /> alysis Gasoline Range Organics WorkOrder 00080243 <br /> Method CA_GRO Lab Batch ID R18906 <br /> Method Blank Samples in Analytical Batch <br /> lunlD HP_U_0008108-368045 Units mg/L Lab Sample ID Client Sample ID <br /> alysis Date 08/10/2000 10 45 Analyst DL 00080243-01A MW-4 <br /> ()0080243-02A MW-5 <br /> 00080243-03A MW-6 <br /> _ _ f 00080243-04A MW-7 <br /> Analyte Result Rep Limit 00080243-05A MW-8 <br />' Gasoline Ran e O anics 1 ND 0 050 00080243-06A MW-9 <br /> Surr 1 4-Difluorobenzene 1033 62-144 <br /> Surr 4-Bramafluorobenzene 957 44-153 00080243-07A MW-10 <br />' 00080243-08A MW-1 <br /> 00080243-09A VEW-1 <br /> Laboratory Control Sample(LCA <br />' RunID HP-U_0008108 367925 Units mg/L <br /> Analysis Date 08/10/2000 10 20 Analyst DL <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Gasoline Range Organics — 1 091 -- -911 75 125 <br /> Matrix Spike MS 1 Matrix Spike Duplicate MSD <br /> Sample Spiked 00080245-03 <br /> RunlD HP—U_040810B-367926 Units mg/L <br />' Analysis Date 08/10/2000 12 36 Analyst DL <br /> Analyte Sample M5 M5 Result MS% MSD MSD Result MSD% RPD RPD ' Low High <br /> Result Spike Recovery , Spike Recovery Limit Limit Limit <br /> AddedAdded <br /> asoline Range Organics - -NDI 0 9� 0 86' —_95 0 91 -- 0 84� 93 7�29 3� 36 160 <br /> lifiers NDIU-Not Detected at the Reporting Limit '- Recovery Outside Advisable QC Limits <br /> B-Analyte detected in the associated Method Blank D-Recovery Unreportable due to Dilution <br /> J - Estimated value between MDL and PQL Ml -Matrix Interference <br /> 00080243 Page 14 <br /> 8121!00 3 13 44 PM <br />