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Sequoia 1455 McDowell Petaluma,CA 94954 <br /> (707)792-1865 <br /> WoAnalytical FAX(707)792-0342 <br /> www segaoialabs cont <br /> . URS Corn-Sacramento Project BP Heritage Site 11194,Tracy,Ca P305041 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/15/03 20 30 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015BI8021B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-1(P305041-07)Water Sampled 04/30/03 10 15 Received 05/01/03 16.05 <br /> Gasoline Range Organics ND 50 ugll 1 3050237 05/09/03 05/09/03 EPA <br /> 8015BI8021B <br /> Benzene ND 050 <br /> Toluene ND 050 " <br /> Ethylbenzene ND 0 50 <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 ^ <br /> Surrogate a a a-Tri luorotoluene 104% 65-135 " <br /> Surrogate 4-BromoJluorobenzene 92% 65-135 " <br /> MW-2 305041-08 Water Sampled 04/30/03 13 55 Received 05/01/03 16 05 <br /> Gasoline Range Organics 67 50 ug/l 1 3050237 05/09/03 05/09/03 EPA <br /> 801511/80218 <br /> Benzene 88 050 " <br /> Toluene ND 050 " <br /> •Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tert-butyl ether 220 25 ^ <br /> Surroizale a a a-Trtlluorotoluene 103% 65-135 " <br /> Surrogate 4-BromoJluorobenzene 92% 65-135 " <br /> MW-3 P305041-09 Water Sampled 04/30/03 12 30 Received 05/01/03 16 05 <br /> Gasoline Range Orgamcs ND 50 ug/l 1 3050237 05/09/03 05/09/03 EPA <br /> 8015BI8021B <br /> Benzene ND 050 " <br /> Toluene ND 0 50 ^ <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 0 50 " <br /> Methyl tert-butyl ether 8 7 2 5 " <br /> Surrogate a a a-TriJluorotoluene 104% 65-135 " <br /> Surrogate 4-BromoJluorobenzene 94% 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 5 of 13 <br />