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1455 McDowell Blvd North Ste D <br /> Sequoia <br /> Petaluma,CA 44949 54 <br /> (707)792-1865 <br /> Analytical www <br /> 7}792 0342 <br /> . w sequequoiaEabs coin <br /> URS Corp-Sacramento Project Arco Site 2186,Stockton,CA P306136 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36593 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/16/03 08 50 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical-Petaluma <br /> Repotting <br /> Analyte Result Lumt Unita Dilution Batch Prepared Analyzed Method Notes <br /> VW-3R(P306136-10)Water Sampled 06/09/03 05.35 Received.06/09/03 08 00 <br /> Gasoline Range Organics 2600 1000 ugn 20 3060348 06/16/03 06/16/03 EPA <br /> 801513!80218 <br /> Benzene ND 10 " <br /> Toluene ND 10 " <br /> Ethylbenzene ND 10 " <br /> Xylenes(total) ND 10 " <br /> Surrogate a a a-Tnfluorotoluene 102% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 100% 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 stated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 6 of 15 <br />