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Sequoia 1455 McDowell Blvd,North Ste <br /> ID Petaluma,CA 949544 <br /> (707)792 1865 <br /> • 1W Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P406323 <br /> 3017 Kilgare Road Suite 100 Project Number WR 63964 Reporters <br /> Rancho Cordova CA,95670 Project Manager Rusty Senkosky 07/07/04 16 39 <br /> Purgeable Hydrocarbons by EPA 8015B <br /> Sequoia Analytical-PetaIuma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> INF(P406323-01)Air Sampled 06/14/0415 55 Received 06/15/04 07 55 <br /> Gasoline Range Organics(C4-C12) 700 250 mg/ml Air 5 4060372 06/16/04 46/16/04 EPA <br /> 8015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 11 " <br /> Gasoline Range Organics(C4-C12) 200 71 ppmv 5 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> EFF(P406323-02)Air Sampled 06/14/04 15 45 Received 06/15/04 07 55 <br /> Gasoline Range Organics(C4-C12) ND 10 mg/ml Air 02 4060372 06/16/04 06/16/04 EPA <br /> 6015B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> Gasoline Range Organics(C4-C12) ND 2 8 ppmv 0 2 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <br /> AS-EFF(P406323-03)Air Sampled 06/14/04 15 50 Received 06/15/04 07 55 <br /> Gasoline Range Organics(C4-C12) 43 10 mg/ml Air 02 4060372 06/16/04 06/16/04 EPA <br /> 8035B-VOA <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " " <br /> Gasoline Range Organics(C4-C12) 12 28 ppmv 02 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 " <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 to its entirety <br /> Page 3 of 10 <br />