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Sequoia <br />Analytical <br />819 Striker Avenue, Suite <br />Sacramento, CA 95834 _ <br />(916)921-9600 <br />FAX (916) 921-010- t <br />www.sequoialabs.cot r <br />Kleinfelder Stocktor Project: Northbrook S308269 <br />2825 East Myrtle Street Project Number: 34202.E01 Reported: <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 />nalyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br />J <br />J <br />Batch 3080201 - EPA 3550B <br />Blank (3080201-BLKI) <br />Prepared & Analyzed: 08/15/03 <br />J <br />Diesel Range Organics (C tO-C28) <br />ND 2.0 <br />mg/kg <br />Surrogate:Octacosane <br />Laboratory Control Sample (3080201 -BSI) <br />0.744 <br />0.667 111 50-150 <br />Prepared & Analyzed: 08/15/03 <br />Diesel Range Organics (C IO -C28) <br />21.5 2.0 <br />mg/kg <br />16.7 129 60-140 <br />Surrogate:Octacosone <br />Matrix Spike (3080201 -MSI) <br />0.769 <br />Source: 5308269-05 <br />0.667 115 50-150 <br />Prepared & Analyzed: 08/15/03 <br />Diesel Range Organics (C 10-C28) <br />21.4 2.0 <br />mg/kg <br />16.7 1.5 119 50-150 <br />Surrogate:Octacosane <br />Matrix Spike Dup (3080201-MSD1) <br />0.676 <br />Source: 5308269-05 <br />0.667 101 50-150 <br />Prepared & Analyzed: 08/15/03 <br />Diesel Range Organics (CIO -C28) <br />21.8 2.0 <br />mg/kg <br />16.7 1.5 122 50-150 2 50 <br />1 <br />Surrogate:Octacosane <br />0.710 <br />0.667 108 50-150 <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 J <br />s� <br />