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1455 McDowell Blvd,Notch Ste D <br /> Sequoia Petal uria.CA 94954 <br /> 707)792-1865 <br /> FAX <br /> qW Analytical wwsequ7ialabs om <br /> wsvw sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P501283 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/27/05 08 37 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-1 (P501283-01)Water Sampled 01/12/05 09 05 Received 01/14/05 14 30 <br /> Tert-amyl methyl ether ND 500 ugll 500 5010267 01/25/05 01/25/05 EPA 8260B <br /> Benzene ND 250 " <br /> Tert-butyl alcohol ND 10000 " <br /> Di-isopropyl ether ND 500 " <br /> Ethanol ND 50000 " <br /> Ethylbenzene ND 250 <br /> Ethyl tert-butyl ether ND 500 " <br /> Methyl tert-butyl ether 9400 250 " <br /> Toluene ND 250 " <br /> Xylenes(total) ND 250 <br /> .Surrogate Dibromofluoromethane 96% 84-112 <br /> Surrogate 12-Dichloroethane-d4 104% 74-135 " <br /> Surrogate Toluene-d8 96% 84-119 " <br /> W <br /> rrogate 4-Bromofluorobenzene 97% 86-119 " <br /> W-2(P501283-02)Water Sampled 01/12/05 09 50 Received 01/14/05 14 30 <br /> Teri-amyl methyl ether ND 500 ugll 500 5010267 01/25/05 01/25/05 EPA 8260B <br /> Benzene ND 250 " <br /> Tert-butyl alcohol ND 10000 <br /> Di-isopropyl ether ND 500 " <br /> Ethanol ND 50000 " <br /> Ethylbenzene ND 250 <br /> Ethyl tent-butyl ether ND 500 " <br /> Methyl tert-butyl ether 9800 250 " <br /> Toluene ND 250 " <br /> Xylenes(total) ND 250 " <br /> Surrogate Dibromofluoromethane 97% 84-122 <br /> Surrogate 1 2-Dichloroethane-d4 108% 74-135 " <br /> Surrogate Toluene-d8 97% 84-119 " <br /> Surrogate 4-8romofluorobenzene 97% 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 12 <br />