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4D 819 Sinker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921 9600 <br /> Analytical FAX(916)921-0100 <br /> www sequoialabs com <br /> er If <br /> D K Barber PE&Associates Project Western Oil&Spread-Acampo S512440 <br /> 8710 Mt Vernon Rd Project Number N/A Reported <br />' Auburn CA,95603 Project Manager Dan Barber 01/26/06 17 32 <br /> Extractable Hydrocarbons by EPA 8015B- 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 5120366-EPA 3510C/EPA 8015B-SVGA <br /> Blank(5120366-BLKI) _Prepared 12/20/05 Analyzed 12/21/05 <br />' Diesel Range Organics(C I O-C28) ND__— 50 USA — <br /> Surrogate Octacosane 187 200 94 50-150 <br /> Laboratory Control Sample(5120366-BSI) Prepared 12/20/05 Analyzed 12/21/05 <br />' Diesel Range Organics(C10-C28) __589 50 ug/I 500 _ 118 60 140 <br /> Surrogate Octacosane 177 200 88 50-150 <br /> Laboratory Control Sample Dup(5120366-BSDt)_ _ _ Prepared—]2/20/05 Analyzed 12/22/05_ <br /> Diesel Range Organics(C I0-C28) 559 _ 50 ugn 500 v 112 60-140 550` <br /> Surrogate Octacosane 172 200 86 50-15o <br /> T <br /> Sequoia Analytical-Sacramento The results in this report apply to the samples analyzed to 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 <br /> Page 5 of 6 <br />