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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> qW�► (707)792-1865 <br /> Analytical <br /> FAX(707) <br /> www sequwalalabs bs c cornm <br /> or - . <br /> URS Corp-Sacramento Project BP Hentage Site 11191,Stockton,Ca P304289 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 04/25/03 I7 26 <br /> Total Petroleum Hydrocarbons as Gasoline and BTEX by EPA 8015B/8021B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Lmut Units Dilution Batch Prepared Analyzed Method Notes <br /> MW4 304289-04 Water Sampled 04/10/03 12 00 Received 04/11/03 14 30 <br /> Gasoline Range Organics 8600 5000 ug/l 100 3040403 04/17/03 04/17/03 EPA <br /> 8015B/8021B <br /> Benzene ND 50 " <br /> Toluene ND 50 " <br /> Ethylbenzene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Methyl tert-butyl ether 14000 250 " <br /> Surrogate a a,a-Trifluorotoluene 103% 65-135 <br /> Surrogate 4-Bromofluorobenzene 90% 65-135 " <br /> MW-5 304289-05 Water Sampled 04/10/03 11 40 Received 04/11/03 14 30 <br /> Gasoline Range Organics 900 500 ug/] 10 3040403 04/17/03 04/17/03 EPA <br /> 801513/8021B <br /> Benzene ND 5 0 " <br /> Toluene ND 5 0 " <br /> Ethylbenzene ND 5 0 <br /> ylenes(total) ND 5 0 " <br /> Methyl tert-butyl ether 1500 25 " <br /> Surrogate a a a-Triuorotoluene 105% 65-135 <br /> Surrogate 4-Bromofluarobenzene 90% 65-135 " <br /> MW-6 P304289-06 Water Sampled 04/10/03 13 15 Received 04/11/03 14 30 <br /> Gasoline Range Organics ND 50 ug/t 1 3040403 04/17/03 04/17/03 EPA <br /> 8015B/802]B <br /> Benzene Nil 050 " <br /> Toluene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Methyl tent-butyl ether ND 2 5 " <br /> Surrogate a,a,a-Tr fluorotoluene 107% 65-135 <br /> Surrogate 4-Bromofluorobenzene 92% 65-135 <br /> 0 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 /> i <br /> Page 4 of 10 <br />