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i <br /> + 1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma CA 94954 <br /> i!D (707)792-1855 <br /> (707}792-0342 <br /> 0 Analytical FAX www sequoialabs cam <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P410096 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/20/04 17 30 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporlmg <br /> Anakyte Result lamrt Units Dilution Batch Prepared Analyzed Method Note <br /> MW-3(P410096-03)Water Sampled 10/04/04 16 30 Received 10/05/04 18 00 <br /> "Pert-amyl methyl ether ND 10 ugA 1 4100304 10/13/04 10/13/04 EPA 8260B <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 " <br /> Dmsopropyl ether ND 10 " <br /> 112-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 12 050 <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 10 <br /> MethyI tert-butyl ether ND 050 " <br /> Toluene ND 0 50 " <br /> Xylenes(total) ND 0 50 <br /> Surrogate Dibromojluoromethane 104% 84-122 " <br /> rrogate 12-Dichloroethane-d4 107% 74-135 <br /> rrogate Toluene-d8 118% 84-119 <br /> Surrogate 4-Bromofluorobenzene 103% 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 5 of I l <br />