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1455 McDowell Blvd <br /> Sequoia Petaluma CA 94954North Ste 4 <br /> (707)792-1865 <br /> Analytical <br /> FAx(707)792 osaz <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11 194,Tracy,Ca P502088 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Jeff Brooks 02/16/05 16 54 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result limit Units Dilution Batch Prepared Analyzed Method Now <br /> AMW-3(P502088-01)Water Sampled 01/31/05 14 30 Received 02/02/05 06 55 <br /> Tert-amyl methyl ether ND 1 0 ug/l 1 5020202 02/14/05 02/14/05 EPA 8260B <br /> Benzene ND 050 <br /> Tert-butyl alcohol ND 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 24 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Drbromofluoromethane 106% 84-122 " <br /> Surrogate 1,2-Dichloroethane-d4 108% 74-135 " <br /> Surrogate Toluene-d8 99% 84-119 " <br /> Surrogate 4-Bromofluorohenzene 103% 86-119 " <br /> �MW-5(P502088-02)Water Sampled 01/31/05 14 55 Received 02/02/05 06 55 <br /> Tert-amyl methyl ether ND 1 0 ug/l I 5020202 02/14/05 02/14/05 EPA 8260B <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 1 0 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate Dibromofluoromethane 101 % 84-122 <br /> Surrogate 1 2-Dichloroethane-d4 103% 74-135 <br /> Surrogate Toluene-d8 97% 84-119 <br /> Surrogate 4-Bromofluorobenzene 105% 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 /> . <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 10 <br />