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Sequoia 1455 McDowell Blvd,North Ste 4 <br /> a— ) <br /> Petaluma,CA 94954 <br /> ► Analytical (707)792 1865 <br /> FAX(707)792 4342 <br /> www sequoialabs coin <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P406323 <br /> 3017 Kilgore Road Suite 100 Project Number WR 63464 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 07/07/04 16 39 <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 4060372-EPA 5030B,waters <br /> Blank(4060372-BLKI) Prepared&An_alyzed 06/16/04 _ <br /> Gasoline Range Organics(C4-C12) ND 50 mg/m'Air <br /> Gasoline Range Organics(C4-C12) ND 14 ppmv <br /> Surrogate 4-Bromofluorobenzene 178 mg/m'Air 300 93 65-135 <br /> Surrogate 4-Bromofluorobenzene 388 ppmv 41 9 93 65-135 <br /> Laboratory Control Sample(4060372-BSI) Prepared&Analyzed 06/16/04 <br /> Gasoline Range Organics(C4-C12) 646 14 ppmv 780 83 65-135 — <br /> Gasoline Range Organics(C4-C12) 2280 50 mglm'Air 2750 83 65-135 <br /> Surrogate 4-Bromofluorobenzene 181 300 94 65-135 <br /> Surrogate 4-Bromafluorobenzene 395 ppmv 41 9 94 65-135 <br /> Matrix S_pike_(406037_2-MSI) Source P406207-01 Prepared&Analyzed 06/16/04 <br /> Gasoline Range Organics(C4-C:12) 663 14 ppmv 780 ND 85 65-135 <br /> Gasoline Range Organics(C4-C12) 2340 50 mg/ml Air 2750 ND 85 65-135 <br /> Surrogate 4-Bromafluorobenzene 392 ppmv 41 9 94 65-135 <br /> Surrogate 4-Bromofluorobenzene 180 mg/ml Air 300 93 65-135 <br /> Matrix Spike Du (4060372-MSDI2 Source P406207-01 Prepared&Analyzed 06/16/04 <br /> Gasoline Range Organics(C4-C12) 641 14 ppmv 780 ND 82 65-135 3 20 <br /> Gasoline Range Organics(C4-C 12) 2260 50 mg/ml Air 2750 ND 82 65-135 3 20 <br /> Surrogate 4-Bromofluorobenzene 181 300 94 65-135 <br /> Surrogate 4-Bromofluorobenzene 391 ppmv 419 94 65-135 <br /> i <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the <br /> chain of custody document Unless otherwise stated results are reported on a wet <br /> weight basis This analytical report must be reproduced in its entirety 0 <br /> Page 6 of 10 <br />