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l Blvd,North Ste <br /> Sequoia 1455 McDowPetaluma,CA 9495D4 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs corn <br /> URS Corp-Sacramento Project Arco Site 2093,Tracy,CA P401386 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36588 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/29/04 19 13 <br /> Purgeable Hydrocarbons and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> Drum Comp(P401386-01)Soil Sampled 01/26/04 11 30 Received 01/27/04 10 00 <br /> Gasoline Range Organics ND 10 mg/kg 1 4010498 01/27/04 01/27/04 EPA <br /> 8015B/8021B <br /> Benzene ND 00050 " <br /> Toluene ND 00050 " <br /> Ethylbenzene ND 00050 <br /> Xylenes(total) ND 00050 " <br /> Surrogate a a a-Triuorotoluene 91 % 65-135 <br /> Surrogate 4-Bromofluorobenzene 79% 65-135 " " <br /> 0 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> 0 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 3 of 8 <br />