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819 Stnker Ave Ste 8 <br /> Sequoia Sacramento CA 95834 <br /> (916)921 9600 <br /> Aualyfical FAX 921 0100 <br /> LL1k www seqequosuoialabs com ' <br /> D K Barber PE&Assoctates Project Western Oil&Spread-Acampo S411512 <br /> 8710 Mt Vernon Rd Project Number NIA Reported <br /> Auburn CA,95603 Project Manager Dan Barber 12/13/04 10 24 <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 /> atch 4110406-EPA 3550B <br /> Lank(4110406-BLK1) Prepared 11/29/04 Analyzed 12/02/04 <br /> Diesel Range Organics(C 10-C28) ND 20 mg/kg <br /> Utor Oil(C 16-C36) ND 40 <br /> rosene(C I Q-C 16) ND 10 <br /> Surrogate Octacosane 0 749 0 667 112 50-150 <br /> lank(4110406-BLK2) Prepared&Analyzed 12/03/04 <br /> Wesel Range Organics(C 10-C28) ND 20 mg/kg <br /> Motor Oil(C16-C36) ND 40 " <br /> fferosene(CIO-Cl(i) ND 1 0 " <br /> aurrogale Octacosane 0 755 0 667 113 50-150 <br /> L oratory Control Sample(4110406-BSI) Prepared 11/29/04 Analyzed 12/02/04 <br /> Range Organics(C10-C28) 142 2 0 mg/kg 167 85 60-140 <br /> urrogate Octacosane 0 734 0 667 110 50-150 <br /> ­Laboratory Control Sample(4110406-BS2) Prepared&Analyzed 12/03/04 <br /> iesel Range Organics(C 10-C28) 143 20 mg/kg 167 86 60-140 <br /> ourrogate Ociacosane 0 707 0 667 106 50-150 <br /> atnx Spike(4110406-MSI) Source S411504-01 Prepared 11/29/04 Analyzed 12/02/04 <br /> iesel Range Organics(CIO-C28) 221 20 mg/kg 167 ND 132 50-150 <br /> Surrogate Octacos ine 1 76 0 667 264 50-150 SO4 <br /> atrix Spike Dup(4110406-MSDI) Source S411504-01 Prepared 11/29/04 Analyzed 12/02/04 <br /> Wesel Range Organics(CIO-C28) 235 20 mg/kg 167 ND 141 50-150 6 50 <br /> Surrogate Octacosane 185 0 667 277 50-150 SO4 <br /> 1 <br /> is Analytical-Sacramento The results to 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 <br /> Page 5 of 6 <br />