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" <br /> Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma,CA 944544 <br /> Analytical (707)792-1665 <br /> FAX(707}792-4342 <br /> www.sequoialabS.com <br /> URS Corp-Sacramento Proi-t:Arco Site 548,Stockton,CA P412404 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number:G09JZ-0037 !' <br /> Reported: <br /> Sacramento CA,95833 Project ManagecVernon P.Elarth 01/11/05 10.28 <br /> Purgeable Hydrocarbons by EPA 8015B Quality Control <br /> Sequoia Analytical-Petaluiina <br /> ' Repotting Spike Source %REC RPD <br /> Analyte Result Limit Units Level ttesult t%REC Limits RPD Limit Notes <br /> t Batch 5010041 -EPA 5030B,waters/EPA 8015B-VOA ;1 <br /> Blank(5010041-BLKI) Prepared&Analyzed:01/04/05 <br /> Crasoline Range Organics(C4-C12) ND 5o ug/1 <br /> Surrogate,4-Bromofluorobenzene 257 300 86 80-110 <br /> Laboratory Control Sample(5010041-BSI) Prepared&Analyzed'.01104/05 <br /> 1 Gasoline Range Organics(C4-C 12) 2600 5o ug/l 2750 I 95 67-101 <br /> Surrogate.-4-Bromofluorobenzene 303 300 101 80-110 <br /> Matrix 5010041-MSl Spike ;3 <br /> P ( ) Source:F412441-04 Prepared:01/04/05 Analyzed:01/05/05 <br /> ' Gasoline Range Organics(C4-C 12) 3600 50 ug/l 2750 ND 131 67-101 LM <br /> Surrogate:4-Bromofluorobenzene 300 300 100 80-110 <br />' Matrix Spike Dup(5010041-MSD1) Source:P412401-04 _Prepared: 01/04/05 Analyzed:01/05/05 <br /> Gasoline Range Organics(C4-C 12) 3590 50 ug/l 2750 ND 131 67-101 0.3 20 LM <br /> Surrogate. 4-Bromofluorobenzene 300 300 100 80-110 <br /> i <br /> P <br /> i <br /> I} , <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 5 of 8 <br />