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Sequoia I455 McDowell Blvd North Ste D <br /> 4D Petaluma,CA 94954 <br /> (707)792-1865 <br /> IW Analytical FAX(707)792 03Q2342 <br /> • www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 2186, Stockton,CA P404354 <br /> 2870 Gateway Oaks Chive Suite 300 Project Number G09JZ-0307 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/28/04 16 54 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical - Petaluma <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD Limit Notes <br /> Batch 4040601 -EPA 5030,soils <br /> Blank(4040601-BLK1) Prepared&Analyzed 04/23/04 <br /> Gasoline Range Organics(C4-C12) ND l 010 mg/kg <br /> Surrogate 4-Bromofluorobenzene 0 267 0 300 89 65-135 <br /> Laboratory Control Sample(4040601-BSI) Prepared&Analyzed 04/23/04 <br /> Gasoline Range Organics(C4-C 12) 179 010 mg/kg 275 65 - 65-135 <br /> Surrogate 4-Bromofluorobenzene 0 276 110 300 92 65-135 <br /> Matrix Spike(4040601-MS1) Source P404492-06 Prepared&Analyzed 04/23/04 <br /> Gasoline Range Organics(C4-C12) 209 10 mg/kg 275 17 70 ' 65 135 <br /> Surrogate 4-Bromofluorobenzene 0 313 " 0 300 104 65-135 <br /> Matnx Spike Dup.(4040601-MSDI) Source P404492-06 Prepared&Analyzed 04/23/04 <br /> Gasolme Range Organics(C4-C 12) 209 10 mg/kg 275 17 69 65-135 05 20 <br /> trrogate 4-Bromofluorobenzene 0 311 110 300 104 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 8 of 13 <br /> M <br />