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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> Analytical www <br /> seq(707)792-0342 <br /> om <br /> www sequoialabs com <br /> URS Corp-Sacramento Project Arco Site 6100,Tracy,CA P503196 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number G09JZ-0287 Reported <br /> Sacramento CA,95833 Project Manager,Tay Johnson 03/25/05 17 38 <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 Irmits RPD Limit Notes <br /> Batch 5030215-EPA 5030B,waters I EPA 8015B-VOA <br /> Matrix Spike Dup(5030215-MSD1) Source P503196-01 Prepared&Analyzed 03/21/05 <br /> Gasoline Range Organics(C4-C12) 2850 50 ug/l 2750 ND 104 609-120 07 20 <br /> Surrogate 4-Bromofluorobenzene 173 300 91 80-110 <br /> 0 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance wrth 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 1 1 of 18 <br />