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HOUSTON LABORATORY <br /> t 8880 INTERCHANGE DRIVE <br /> HOUSTON,TX 77054 <br /> Quality Control Report (713)660-0901 <br /> Shell Oil Company <br /> INC#N/A " <br /> Analysis: Diesel Range Organics-TCLP WorkOrder: 04061001 <br /> Method: CA-DRO Lab Batch ID: 39027 <br /> Method Blank Samples in Analytical Batch: <br /> RunID: HP_T_040703A-2299674 Units: mg/L Lab Sample ID Client Sample ID <br /> IAnalysis Date: 07/03/2004 23:02 Analyst: AE 04061001-05A B2@4.0-4.5' <br /> Preparation Date: 06/28/2004 10:33 Prep By: K_L Method SW3510C <br /> Analyte Result Rep Limit <br /> Diesel Range O anics ND 0.50 <br /> Sun.n-Pentacosane 84.0 20-1500 <br /> Leachate Blank <br /> 1RunID: HP T 040703A-2300717 Units: mg/L <br /> Analysis Date: 07/03/2004 22:03 Analyst: AE <br /> Preparation Date: 06128!2004 10:33 Prep By: Method <br /> Analyte Result lRep Limit <br /> Diesel Range Organics ND 0.5 <br /> Surr.n-Pentacosane 85.0 20-150 <br /> Laboratory Control Sample fLCS] <br /> RunID: HP T_040703A-2299673 Units: mg/L <br /> Analysis Date: 07/03/2004 22:33 Analyst: AE <br /> Preparation Date. 06/28/2004 10:33 Prep By: K_L Method SW3510C <br /> Analyte Spike Result Percent Lower Upper <br /> Added Recovery Limit Limit <br /> Diesel Range Organics 2.5 1.81 72.6 21 175 <br /> Matrix Spike MS 1 Matrix Spike Duplicate MSD <br /> { Sample Spiked: . 04061001-05 <br /> RunID: HP_T_040703A-2299670 Units: mg/L <br /> Analysis Date: 07/03/2004 21:04 Analyst: AE <br /> Preparation Date: 06128/2004 10:33 Prep By: Method <br /> Analyte Sample MS MS MS% MSD MSD MSD% RPD RPD Low High <br /> Result Spike Result Recovery Spike Result Recovery Limit Limit Limit <br /> Added Added <br /> "Diesel Range Organics 3.03 5 19.1 322' 5 15.0 240" 24.0' 20 211 175 <br /> Qualifiers: ND/U-Not Detected at the Reporting Limit MI-Matrix 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 /> NIC-Not Calculated-Sample concentration is greater than 4 times the amount of spike added.Control limits do not apply. <br /> The percent recoveries for QC samples are correct as reported.Due to significant figures and 04061001 Page 34 <br /> rounding,the reported RPD may differ from the displayed RPD values but is correct as reported. 7/9104 3:06:52 PM <br />