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Sequoia 1455 McDowell Petaluma,CA 9419544 <br /> Anal tical <br /> (707)792 1865 <br /> PAX(707)792 0342 <br />�.� www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P407278 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 08/11/04 09 51 <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 %RFC Limits RPD Limit Notes <br /> Batch 4070524-EPA 5030B,waters <br /> Laboratory Control Sample(4070524-BS1) Prepared&Analyzed 07/27/04 <br /> Gasoline Range Organics(C4 Cl2) 2330 50 ug/l 2750 85 65-135 <br /> Surrogate 4-Bromofluorobenzene 278 300 93 65 135 <br /> Matrix Spike(4070524-MS 1) Source P407278-09 Prepared&Analyzed 07/27/04 <br /> Gasoline Range Organics(C4-C12) 2370 50 ug/l 2750 ND 86 65 135 <br /> Surrogate 4-Bromofluorobenzene 278 300 93 65135 <br /> Matrix Spike Dap(4070524-MSD1) Source P407278-09 Prepared&Analyzed 07/27/04 <br /> Gasoline Range Organics(C4-C 12) 2300 50 ug/l 2750 ND 84 65-135 3 20 <br /> Surrogate 4-Bromofluorobenzene 276 300 92 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 staled results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page l l of 17 <br />