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Blvd,North Ste <br /> Sequoia 1455McDowyealuma,CA9494 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br />' URS Corp-Sacramento Project Arco Site 760,Lodi,CA P403600 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G091Z-0039 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/08/04 14 36 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B -Quality Control <br /> Sequoia Analytical - Petaluma <br /> Repartmg Spike Source 'YoREC RPD <br /> Analyte Result Limit Units level Result %REC Limits RPD Lunt Notes <br /> Batch 4030875-EPA 5030,soils <br /> Matrix Spike(4030875-MSI) Source P403594-13 Prepared&Analyzed 03/30/04 <br /> Gasolme Range Organics(C6-CI 0) 238 10 mg/kg 275 0 026 86 65-135 <br /> 1 Surrogate a a a-Tris luorotoluene 0 265 II 0 300 88 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 256 0 300 85 65-135 <br /> Matrix Spike Dup(4030875-MSDl) Source P403594-13 Prepared&Analyzed 03/30/04 <br /> Gasoline Range Organics(C6-C10) 212 10 mg/kg 275 0 026 76 65-135 12 20 <br /> Surrogate aaa-TriJluorotoluene 0 244 0 300 81 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 240 0 300 80 65-135 <br /> Sequoia Analytical-Petaluma 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 <br /> Page 11 of 18 <br />