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s Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma,CA 949544 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www.sequoialabs.com <br /> Gorp-Sacramento Project: Arco Site 5450,Stockton,CA P304543 <br /> 7RS <br /> 70 Gateway Oaks Drive Suite 300 Project Number: WR36604 Reported: <br /> cramento CA,95833 Project Manager: Vernon P.Elarth 05/49/03 15:37 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-2 P304543-01 Water Sampled:04/24/0311:10 Received:04/25/0314:30 <br /> Gasoline Range Organics ND 50 ue 1 3050138 05/06/03 05/06/03 EPA <br /> 801513/8021 B <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 101 % 65-135 " <br /> Surrogate:4-Bromofluorobenzene 99% 65-135 " <br /> MW-3(P304543-02)Water Sampled:04/24/03 10:50 Received:04/25/03 14:30 <br /> Gasoline Range Organics ND 50 ugA 1 3050138 05/06/03 05/06/03 EPA <br /> 80 t SB18021 B <br /> Benzene ND 0.50 " <br /> Toluene ND 0.50 " <br /> Ethylbenzene ND 0.50 " <br /> Xylenes(total) ND 0.50 " <br /> irrogate:a,a,a-Trifluorotoluene 102% 65-135 " <br /> urrogale:4-Bromofluorobenzene 100% 65-135 " <br /> MW-4(P304543-03)Water Sampled:04/24/03 11:30 Received:04/25/03 14:30 <br /> Gasoline Range Organics ND 50 ugll 1 3050138 05/06/03 05/06103 EPA <br /> 8015B/8021 B <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-Triuorotoluene 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 3 of 9 <br />