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819 Striker AvenueSuiteSequoia CA958craeno, 34 <br /> _ <br /> (916)921-9600 <br /> Analytical <br /> ytical FAX(916)921-010 <br /> Imo. t <br /> 1 www.sequoialabs.cot�i <br /> Kleinfelder Stocktor Project: Northbrook S308269 } <br /> 2825 East Myrtle Street Project Number: 34202.E01 Reported: J <br /> Stockton CA,95205 Project Manager: Joe Zilles 08/20/03 17:53 <br /> Diesel Hydrocarbons with Silica Gel Cleanup by DHS LUFT - Quality Control <br /> Sequoia Analytical= Sacramento <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 3080201 -EPA 3550B <br /> Blank(3080201-BLKI) Prepared&Analyzed:08/15/03 J <br /> Diesel Range Organics(C t0-C28) ND 2.0 mg/kg <br /> Surrogate:Octacosane 0.744 0.667 111 50-150 <br /> Laboratory Control Sample(3080201-BSI) Prepared&Analyzed:08/15/03 <br /> Diesel Range Organics(C 10-C28) 21.5 2.0 mg/kg 16.7 129 60-140 <br /> Surrogate:Octacosone 0.769 0.667 115 50-150 <br /> Matrix Spike(3080201-MSI) Source:5308269-05 Prepared&Analyzed: 08/15/03 <br /> Diesel Range Organics(C 10-C28) 21.4 2.0 mg/kg 16.7 1.5 119 50-150 <br /> Surrogate:Octacosane 0.676 0.667 101 50-150 <br /> Matrix Spike Dup(3080201-MSD1) Source:5308269-05 Prepared&Analyzed: 08/15/03 <br /> Diesel Range Organics(CIO-C28) 21.8 2.0 mg/kg 16.7 1.5 122 50-150 2 50 1 <br /> Surrogate:Octacosane 0.710 0.667 108 50-150 <br /> J <br /> J <br /> J <br /> J <br /> . J <br /> J <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> This analytical report must be reproduced in its entirety. 1 <br /> Page 22 of 29 <br />