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a_ _� Sequoia 1455 McDowell Blvd North Ste 4Petaluma CA 94454 Analytical (707)792-1865342 <br /> Y FAX(707)792 D342 <br /> . www sequoialabs cam <br /> Secor-Rancho Cordova Project Arco Site 4932,Stockton,CA P403078 <br /> 3017 Ugare Road Suite 100 Project Number 38984 Reported <br /> Rancho Cordova CA,95670 Project Manager Rusty Benkosky 03/19/04 15 02 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B18021B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> EFF(P403078-03)Air Sampled 03/03/0410 30 Received 03/04/04 08 55 <br /> Gasoline Range Organics ND 10 mg/m'Air 02 4030128 03/05/04 03/05/04 EPA <br /> 8015B/802IB <br /> Benzene ND 010 " <br /> Toluene ND 010 ^ <br /> Ethylbenzene ND 0 10 ^ <br /> Xylenes(total) ND 010 " ^ <br /> Methyl tert-butyl ether 0 57 040 " ^ <br /> Surrogate a a,a-Trifluorotoluene 100% 65-135 ^ <br /> Surrogate 4-Bromof7uorobenzene 100% 65-135 " ^ <br /> Gasoline Range Organics ND 2 8 ppmv 0 2 <br /> Benzene ND 0 032 <br /> Toluene ND 0 026 <br /> .Ethylbenzene ND 0 024 <br /> Xylenes(total) ND 0 024 <br /> Methyl tert-butyl ether 0 16 Oil <br /> Surrogate aa a-Tnfluorotoluene 100% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 100% 65-135 ^ H <br /> Sequoia Analytical-Petaluma The results to this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 5 of 23 <br />