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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-t865865 <br /> 42 <br /> Analytical FAXcquoi labsc m <br /> www,sequoialabs coin <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P310692 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 11/14/03 15 55 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> MW-2(P310692-13)Water Sampled 10/29/03 14 45 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 10 ugn l 3110173 11/10/03 11/10/03 EPA 8260B <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 " <br /> Dr-isopropyl ether ND 1 D <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether 0 55 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 0 50 <br /> Surrogate Dibromofluoromethane 105% 84-121 " <br /> Surrogate 1 2-Dichloroethane-d4 98% 74-135 " <br /> rragate Toluene-d8 113% 84-119 " " 11 " <br /> W-6(P310692-14)Water Sampled 10/29/03 15 20 Received 10/31/03 10 30 <br /> Tert-amyl methyl ether ND 5 0 ug/l 5 3110173 11/10/03 11/10/03 EPA 82606 <br /> Benzene 14 2 5 11 " <br /> Tert-butyl alcohol ND 100 11 " <br /> Di-isopropyl ether ND 5 0 " <br /> Ethanol ND 500 " <br /> Ethylbenzene 23 25 " <br /> Ethyl tert-butyl ether ND 5 0 " <br /> Methyl tert-butyl ether ND 2 5 " <br /> Toluene ND 2 5 " <br /> Xylenes(total) ND 2 5 " " <br /> Surrogate Dibromofluoromethane 108% 84-122 1 " " " <br /> Surrogate 12-Dichloroethane-d4 100% 74-135 " <br /> 11 <br /> Surrogate Toluene-d8 117% 84-119 " 11 <br /> " <br /> �equola 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 11 of 22 <br />