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• x <br /> Sequoia lass McDowell Blvd,North 4 <br /> t i Petaluma,CA 94949 54 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www.sequoialabs.com <br /> URS Corp-Sacramento Project: Arco Site 6100,Tracy,CA P306337 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number: WR36619 Reported: <br /> Sacramento CA,95833 Project Manager:-Vernon P.Elarth 07/02/03 16:43 I <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B f <br /> Sequoia Analytical -Petaluma <br /> Reporting <br />•#. .l <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> I' MW-2(P306337-01)Water Sampled:06/17/0306:44 Received:06117/0315:00 <br /> Gasoline Range Organics 170 50 ug/I 1 3060635 06/25/03 06/25/03 EPA HC-19a <br /> 8015B/802 I B <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 <br /> Ethylbenzene ND 0.50 <br /> EI Xylenes(total) 1.4 0.50 <br /> E Surrogate:a,a,a-Tris luorotoluene 101 % 65-135 " <br /> Surrogate:4-Bromofluorobenzene 86% 65-135 <br /> l MW-6(P306337-02)Water Sampled:06/17/03 07:20 Received:06/17/03 15:00 <br /> f Gasoline Range Organics 61000 2500 ug/I 50 3060635 06/25/03 06/25/03 EPA <br /> f 8015B/8021B <br /> E Benzene 7200 25 " <br /> Toluene 8800 25 " <br /> f f thylbenzene 270 25 " <br /> 4. ylenes(total) 17000 25 <br /> t Surrogate:a,a,a-Triuorotoluene 103% 65-135 <br /> Surrogate:4-Bromofluorobenzene 86% 65-135 <br /> VW-5(P306337-03)Water Sampled:06/17/03 06:22 Received:06/17/03 15:00 <br /> Gasoline Range Organics 220 50 ug/l l 3060635 06/25/03 06/25/03 EPA <br /> 8015B/8021B <br /> Benzene 1.4 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) 0.98 0.50 " <br /> I1 Surrogate:a,a,a-Trifluorotoluene .103% 65-135 <br /> Surrogate:4-Bromofluorobenzene 87% 65-135 " <br /> -Sequoia Analytical-Petaluma The results in this report apply to rhe samples analyzed in accordance with the chain of <br /> (�! custody document. Unless otherwise stated,results are reported on a wet weight basis. <br /> I� This analytical report must be reproduced in its entirety. <br /> Page 3 of 10 <br />