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Sequoia ` r 819 Striker Ave Ste 8 <br /> V Saawnento,CA 95834 <br /> iW Analytical (916)921-9600 <br /> FAX(916)921-0100 <br /> www.sequoialabs.com <br /> D.K.Barber PE&Associates Project: Western Oil&Spread-Acampo 5311112 <br /> 8710 Mt.Vernon Rd. Project Number: N/A Reported: <br /> Auburn CA,95603 Project Manager: Dan Barber 11/21/03 09:26 <br /> Extractable Hydrocarbons by EPA 8O15B-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 3110255-EPA 3510C <br /> Blank(3110255-BLK1) Prepared&Analyzed: 11/19/03 <br /> Diesel Range Organics(C 10-C28) ND 50 ug/I <br /> Surrogate:Octacosane 22.5 20.0 112 50-I50 <br /> Laboratory Control Sample(3110255-BS1) Prepared&Analyzed• 11/19/03 <br /> Diesel Range Organics(C10-C28) 528 50 ug/1 500 106 60-140 <br /> Surrogate:Octacosane 22.6 20.0 113 50-150 <br /> Laboratory Control Sample Dup(3110255-BSDI) Prepared&Analyzed: 11/19/03 <br /> Diesel Range Organics(C 10-C28) 526 50 ug/I 500 105 60-140 0.4 50 <br /> Surrogate:Octacosane 22.9 1120.0 114 50-150 <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document. Unless otherwise stated,results are reported on a wet weight <br /> basis. This analytical report must be reproduced in its entirety. <br /> Page 5 of 8 <br />