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Sequoia 1455 McDowell Blvd,North Ste D <br /> Petaluma,CA 94954 <br /> a— ) (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> wwwsequoialabs.cam <br /> URS Corp-Sacramento Project: Arco Site 5469,Stockton,CA P305380 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36605 Reported: <br /> Sacramento CA,95833 Project Manager: Jay Johnson 06/18/03 21:10 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 801513/802113 <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-10(P305380-10)Water Sampled:05/19/03 06:00 Received:05/19/03 11:45 <br /> Gasoline Range Organics 75 50 ugll 1 3050703 05/28/03 05/28/03 EPA <br /> 8015B/8021B <br /> Benzene 5.7 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 111 % 65-135 " <br /> Surrogate:4-Bromofuorobenzene 97% 65-135 " <br /> Sequoia <br /> quoia 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 10 of 36 <br />