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PWI HOUSTON LABORATORY <br /> 8880 INTERCHANGE ORJV9RlVB <br /> HOUSTON TEXAS 77054 <br /> ® (743)660-0801 <br /> Quality Control Report <br /> EXXON Company U S A_ <br /> UP3942 i <br />'nalysis Gasoline Range Organics WorkOrder 00090284 <br /> lethod CA GRO Lab Batch ID 821084 <br /> Mather#Blank Samples in Analytical Batch <br /> unlD HPN0009208-408796 Units mg/L Lab Sample ID Client Sample ID <br /> nalysis Date 09/20/2000 10 09 Analyst DL 00090294-09A RW-1 <br /> 00090294-12A RW-4 <br /> Analyte Result Rep Limit <br /> Gasoline Rancia A arncs ND Casa <br /> Surr t 4-pifluorobenzene 102 0 &2-144 <br /> Surr 4-13mmofluorobenzene j 99 3j 44-153 <br /> Laboratory CQntrol Sample(1-CS) <br /> Runl[) HP_N_0009208-408795 Units mg/L. <br /> Analysis Date 09/20/2000 9 43 Analyst DL <br /> Analyte Spike Result Percent Lower Lipper <br /> Added Recovery Limit Limit <br /> Gasoline Range Organics 1 _0821 82 70 130 <br /> Matrix Spike fM$l i MatriX Scik_e Oupllcate(MSD) <br /> Sample Spiked 00090424-02 <br /> Run1D HP N_Oo0920B-408797 Units mg/L. <br /> Analysis Date 09/24/2000 14 14 Analyst DL <br /> Analyte Sample Result MS MS Result MS 96 MSD MSD Result MSD% RPD RPD Low High <br /> Spike Recovery Spike Recovery Limit Limit Lima <br /> Added Added <br /> ohne Range Organics ND 0 9 0 83 $83 0 9 0 85 90 1 2 04 36 36 160 <br /> ifiers ND/U-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 MI-Matrix Werference <br /> V21 IM 1 43 54 PM <br />