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• 1455 McDowell Blvd,North Ste D <br /> 60Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> iW Analytical FAX(707)792-0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 760,Lodi,CA P304288 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36622 Reported: <br /> Sacramento CA,95833 Project Manager: Vernon P.Elarth 04/25/03 17:11 <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 Notes <br /> MW-1 (P304288-01)Water Sampled:04/10/03 14:55 Received:04/11/03 14.30 <br /> Gasoline Range Organics ND 50 ug/l 1 3040377 04/16/03 04/16/03 EPA <br /> 8015B/8021B <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) ND 0.50 " <br /> Surrogate:a,a,a-Trifluorotoluene 109% 65-135 <br /> Surrogate:4-Bromofluorobenzene 86% 65-135 <br /> MW-2(P304288-02)Water Sampled:04/10/03 15:15 Received:04/11/03 14.30 <br /> Gasoline Range Organics 130 50 ug/l 1 3040377 04/16/03 04/16/03 EPA <br /> 8015B/8021B <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 1.6 0.50 <br /> Surrogate:a,a,a-Trifluorotoluene 94% 65-135 " <br /> Surrogate:4-Bromofluorobenzene 82% 65-135 " <br /> MW-3(P304288-03)Water Sampled:04/10/03 15:35 Received:04/11/03 14.30 <br /> Gasoline Range Organics 140 50 ug/l 1 3040377 04/16/03 04/16/03 EPA <br /> 8015B/8021B <br /> Benzene ND 0.50 <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> Xylenes(total) 1.1 0.50 <br /> Surrogate:a,a,a-Trifluorotoluene 103% 65-135 <br /> Surrogate:4-Bromofluorobenzene 90% 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 3 of 8 <br />