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l Blvd North Sic <br /> Sequoia ]455 McDowPetalurna,CA 94954 <br /> (707)792 1865 <br /> Analytical FAX(707)792 0342 <br /> www sequoialabs cam <br /> URS Cor)-Sacramento Project BP Hentage Site 11194,Tracy,Ca P305041 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vemon P Elarth 05/15/03 20 30 <br /> Total Petroleum Hydrocarbons as Gasohne and BTEX by EPA 8015BI8021B <br /> Sequoia Analybeal-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-4(P305041-10)Water Sampled 04/30/03 13 40 Received 05/01/03 16 05 _ <br /> Gasoline Range Organics 1200 50 ug/1 1 3050237 05/09/03 05/09/03 EPA <br /> 8015B/802]B <br /> Benzene 084 050 QR-04 <br /> Toluene ND 050 <br /> Ethylbenzene 9 3 050 " <br /> Xylenes(total) 3 6 050 " <br /> Methyl tert-butyl ether 37 2 5 " <br /> Surrogate a a a-Tnfluorotoluene 91 % 65-135 " <br /> Surrogate 4-Bromofluorobenzene 106% 65-135 " <br /> MW-5(P305041-11)Water Sampled 04/30/03 13 10 Received 05/03/03 16 05 <br /> Gasoline Range Organics 74 50 ug/l 1 3050237 05/09/03 05/09/03 EPA <br /> 8015B/8021B <br /> Benzene ND 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tent-butyl ether 14 2 5 " <br /> Surrogate a a a-Trifluorotoluene 100% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 96% 65-135 " <br /> MW-6(P305041-12)Water Sampled 04/30/03 1_4 20 Received 05/01/03 16 05 <br /> Gasoline Range Organics 4900 1000 ug/l 20 3050237 05/09/03 05/09/03 EPA <br /> 8015B/802113 <br /> Benzene 35 10 <br /> Toluene ND 10 " <br /> Ethylbenzene 44 10 <br /> Xylenes(total) ND 10 " <br /> Methyl tert-butyl ether 80 50 " <br /> Surrogate a a,a-Tri luorotoluene 100% 65-135 " <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed in accordance with the chain <br /> of custody document Unless otherwise stated results are reported on a wet weight <br /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 13 <br />