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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma, 94954 <br /> `1 (707)792-1865 <br /> FAX iW Analytical ww.seq 7)792-0342 <br /> www.sequai alahs.cote <br /> I <br /> i <br /> I <br /> URS Corp-Sacramento Projwt:Arco Site 5450,Stockton,CA P409110 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number:WR36604 it�' <br /> Sacramento CA,95833 Project Manager:Jeff Brooks 09/116/46/04 15:54 <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 4090266-EPA 50308,waters <br /> Blank(4090266-BLKI) Prepared&Analyzed:09/13/04 <br /> Gasoline Range Organics(C4-C 12) ND 50 ugll <br /> Surrogate:4-Bromofluarobenzene 301 300 101 77-101 <br /> Laboratory Control Sample(4090266-BSI) Prepared&Analyzed:09/13/04 <br /> Gasoline Range Organics(C4-C12) 2490 50 ugll 2750 91 67-101 <br /> Surrogate:4-Bromofluorobenzene 308 300 103 77-101 LH <br /> Matrix Spike(4090266-MSI) Source:P409077-08 Prepared&Analyzed:09/13/04 <br /> Gasoline Range Organics(C4-C12) 1 2600 50 ug/I 2750 ND 95 67-101 <br /> Surrogate., 313 300 104 77-101 LH <br /> . <br /> Matrix Spike Dup 4090266-MSDI) Source:P409077-08 Prepared&Analyzed:09/13/04 <br /> Gasoline Range Organics(C4-C 12) 2520 50 ug/l 2750 ND 92 67-101 3 20 <br /> . Surrogate:4-Bromofluorobenzene d 1 lS 304 300 101 77-101 <br /> I <br /> I <br /> Sequoia Analytical-Petaluma 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 6 of 9 <br /> I <br />