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1455 McDowell BOvd,North Ste D <br /> SequoiaPetaluma,CA94954 <br /> �� Analytical (707)792-0 <br /> 865 <br /> FAX(707)792-0342342 <br /> www sequolalabs coin <br /> 0 <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P411027 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 12/06/0415 39 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical- Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analysed Method Note <br /> AMW-3(P411027-01)Water Sampled 10/28/04 11 15 Received 10/29/04 13 10 <br /> Tert-amyl methyl ether ND 10 ug/1 1 4110095 11/03/04 11/03/04 EPA 8260B <br /> Benzene ND 0 50 <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 10 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Melhyl tert-butyl ether 29 0 50 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromo luoromethane 107% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 110% 74-135 " <br /> Surrogate Toluene-d8 114% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 100% 86-119 " <br /> W2 <br /> MW-5(P411027-02)Water Sampled 10/28/04 12 45 Received 10/29/0413 10 <br /> Tert-amyl methyl ether ND 10 ugll 1 4110095 11/03/04 11/03/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> Teri-butyl alcohol 34 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 2 9 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate DibromoJluoromethane 106% 84-122 <br /> Surrogate 1,2-Dichloroethane-d4 108% 74-135 " <br /> Surrogate Toluene-d8 116% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 101 % 86-119 " <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 4 of I0 <br />