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•l ' <br /> .� • 1455 McDowelletaluma,CA 949 4 <br /> Sequoia (767)792 1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> • <br /> URS Corp-Sacramento Project Arco Site 2168, Stockton,CA P311134 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36590 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/18/03 18 08 <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 RPE] Limit Notes <br /> Batch 3110262-EPA 5030,waters <br /> Blank(3110262-BLKI) Prepared&Analyzed 11/12/03 <br /> Gasoline Range Organics ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 285 11300 95 65-135 <br /> Laboratory Control Sample(3110262-BSI) Prepared&Analyzed 11/12/03 <br /> Gasoline Range Organics 2350 50 ug/l 2750 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 305 11300 102 65-135 <br /> Matrix Spike(3110262-MSI) Source P311134-02 Prepared&Analyzed 11/12/03 <br /> Gasolme Range Organics 2330 50 ug/l 2750 13 84 65-135 <br /> Surrogate 4-Bromofluorobenzene 296 11300 99 65-135 <br /> Matrix Spike Du (3110262-MSDI) Source P311134-02 Prepared&Analyzed 11/12/03 <br /> Gasoline Range Organics 2330 50 ug/l 2750 13 84 65-135 0 20 <br /> W11-gale 4-Bromofluorobenzene 296 11300 99 65-135 <br /> Batch 3110263-EPA 5030,waters <br /> Blank(3110263-BLKI) Prepared&Analysed 11/12/03 <br /> Gasoline Range Organics ND 50 ug/l <br /> Surrogate 4-Bromofluorobenzene 293 1300 98 65-135 <br /> Laboratory Control Sample(3110263-BSI) Prepared&Analyzed 11/12/03 <br /> Gasoline Range Organics 2380 50 ug/1 2750 87 65-135 <br /> Surrogate 4-Bromofluorobenzene 309 1300 103 65-135 <br /> Matrix Spike(3110263-MSI) Source P311134-09 Prepared&Analyzed 11/12/03 <br /> Gasoline Range Organics 2570 50 ug/l 2750 320 82 65-135 <br /> Surrogate 4-Bromofluorobenzene 323 11300 108 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 17 <br />