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1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma,CA 94954 <br /> (707)792-1865 <br /> mW Analytical FAX(707)792-0342 <br /> www sequoialabs com <br /> URS Corp-Sacramento Project BP Heritage Site 11194,Tracy,Ca P305041 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36365 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/15/03 20 30 <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 /> AMW-3.(P305041-03)Water Sampled 04/30/03 11 25 Received 05/01/03 16 05 <br /> Methyl tert-butyl ether 25 050 ug/I 1 3050376 05/14/03 05/14/03 EPA 8260E <br /> Surrogate Dibromofluoromethane 104% 84-121 " <br /> AMW-5(P305041-05)Water Sampled 04/30/03 12 50 Received 05/01/03 16 05 _ <br /> Methyl tert-butyl ether 76 1 0 ug/I 2 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 106% 84-122 " <br /> 1MW-6(P305041-061 Water Sampled 04/30/03 13 00 Received 05/01/03 16 05 <br /> Methyl tert-butyl ether 2 3 0 50 ug/l 1 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 108% 84-121 " <br /> MW-2(P305041-08)Water Sampled 04/30/03 13 55 Received 05/01/03 16 05 <br /> Methyl tert-butyl ether 290 5 0 ug/l 10 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 100% 84-122 " <br /> MW-3(P305041-09)Water Sampled 04/30/03 12 30 Received.05/01/03 16 05 <br /> Methyl tert-butyl ether 99 050 ug/l 1 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 90% 84-112 <br /> MW-4(P305041-10)Water Sampled 04/30/03 13 40 Received 05/01/03 16 05 <br /> Methyl tert-butyl ether 41 050 ug/l 1 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 109% 84-122 " <br /> MW-5(P305041-11)Water Samnled 04/30/03 13 10 Received 05/01/03 16 05 <br /> Methyl tert-butyl ether 17 050 ug/I 1 3050376 05/14/03 05/14/03 EPA 8260B <br /> Surrogate Dibromofluoromethane 108% 84-122 11 " " <br /> Sequoia Analytical-Petaluma The results in this report apply to the samples analyzed m 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 8 of 13 <br />