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1455 McDowell Blvd,North Ste D <br /> - ' Sequoia Petaluma,C94 <br /> (9D7)7992-]865865 <br /> FAX <br /> WAnalytical wwseq oialab com. <br /> ww�v segaoiafabs corn <br /> URS Corp-Sacramento Project BP Heritage Site 11191,Stockton,Ca P404678 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36368 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 05/27/04 15 02 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Motes <br /> MW-3(P404678-03)Water Sampled 04127104 10 35 Received 04128/04 12 30 <br /> Tert-amyl methyl ether ND 100 ug/l 100 4050236 05/11/04 05/11/04 EPA 8260B <br /> Benzene ND 50 " <br /> Tert-butyl alcohol 8500 2000 ccol <br /> Di-isopropyl ether ND 100 " <br /> Ethanol ND 10000 " <br /> Ethylbenzene ND 50 " <br /> Ethyl tert-butyl ether ND 100 " <br /> Methyl tert-butyl ether 5600 50 " E <br /> Toluene ND 50 " <br /> Xylenes(total) ND 50 " <br /> Surrogate Dibromofluoromethane 9.5% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 109% 74-135 " <br /> Surrogate Toluene-d8 102% 84-119 " <br /> MW-3(P404678-03RE1)Water Sampled 04/27/04 10 35 Received 04/28/0412 30 HT-04 <br /> i <br /> r'-butyl alcohol 8500 5000 ugll 250 4050263 051t 1104 05/12/04 EPA 8260B <br /> ethyl tert-butyl ether 6300 120 " <br /> Surrogate Dibromofluoromethane 100% 84-122 " <br /> Surrogate 1 2-Dtchloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 102% 84-119 " <br /> MW-4(P404678-04)Water Sampled 04/27/04 10 00 Received 04/28/04 12 30 <br /> Tert-atnyl methyl ether ND 50 ugn 50 4050236 05/11/04 05/11/04 EPA 8260E <br /> Benzene ND 25 <br /> Tert-butyl alcohol ND 1000 " <br /> Di-isopropyl ether ND 50 " <br /> Ethanol ND 5000 " <br /> Ethylbenzene ND 25 <br /> Ethyl tert-butyl ether ND 50 " <br /> Methyl tert-butyl ether 810 25 " <br /> Toluene ND 25 " <br /> Xylenes(total) 64 25 " <br /> Surrogate Dibromofluoromethane 96% 84-122 " <br /> Surrogate 12-Dichloroeihane-d4 104% 74-135 " <br /> Surrogate Toluene-d8 102% 84-119 " <br /> Sequoia Analytical -Petaluma The results in this report apply to the samples analyzed in accordance wrth 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 5 of 14 <br />