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i <br /> Sequoia 1455Mcl7owBlvd ,CA <br /> P Ste <br /> Petaluma,GA 944544 <br /> (707)792-1865 <br /> FAX Analytical ww.seq oWabs0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project:Arco Site 5450,Stockton,CA P503065 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number:WR36604 Reported: <br /> Sacramento CA,95833 Project Manager.Jeff Brooks 03/14/05 18:14 <br /> Purgeable Hydrocarbons by EPA 8015B - Quality Control <br /> Sequoia Analytical -Petaluma <br /> I <br /> Reporting Spike Source %REC RPD <br /> Analyte Result Limit Units Level Result %REC Limits RPD limit Notes <br /> Batch 5030103-EPA 5030B,waters I EPA 80159-VOA <br /> Blank(5030103-BLKI) Prepared&Analyzed:03/09/05 <br /> Gasoline Range Organics(C4-C12) ND 50 ugA <br /> Surrogate:4-Bromo luorobenzene 241 11300 80 80-110 <br /> Laboratory Control Sample(5030103-BSI) Prepared&Analyzed:03/09/05 <br /> Gasoline Range Organics(C4-C 12) 2390 50 ug/l 2750 87 60.9-120 <br /> Surrogate:4-BromoJlucrobenzene 268 11300 89 80-110 <br /> i <br /> Matrix Spike(5030103-MSI) Source:P503053-09 Prepared&Analyzed:03/09/05 <br /> Gasoline Range Organics(C4-C12) 2340 50 ugll 2750 ND 85 60.9-120 <br /> Surrogate:4-BrainoJluorobenzene 160 11300 87 80-110 <br /> Matrix S ike Dup(5030103-MSDI) Source:P503053-09 Prepared&Analyzed:03/09/05 <br /> Gasoline Range 6rganics(C4-G12) 2320 50 ugli 2750 ND 84 60.9-120 0.9 20 <br /> rrogate:4-Bromofluoroben�ne 265 1300 , 88 80-110 <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 6 of 9 <br /> I <br /> I <br />