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r <br /> 1455 McDowell BlvdNorth Ste D <br /> CA <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> Analytical FAX cquoi labs c 42 <br /> www sequoialabs cam <br /> r <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P412284 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 01/13/05 08 48 <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-5(P412284-02RE1)Water Sampled 12/13/04 09 00 Received 12/14/04 11 30 CU <br /> Teri-amyl methyl ether ND 1 0 ugll 1 5010120 01/10/05 01/10/05 EPA 8260E <br /> Benzene ND 0 50 " <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1 0 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> 1,2-Dichloroethane ND 0 50 " <br /> Ethanol ND 100 " 11 <br /> Ethylbenzene ND 0 50 " <br /> Ethyl tert-butyl ether ND 1 0 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene 061 050 <br /> Xylenes(total) 13 050 <br /> Surrogate Dibromo,Jluoromethane 101 % 84-122 <br /> Surrogate 12-Dichloroethane-d4 106% 74-135 <br /> urrogate Toluene-d8 104% 84-119 <br /> Surrogate 4-Bromo luorobenzene 105% 86-119 <br /> r <br /> r <br /> r <br /> r <br /> r <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 11 <br /> r <br />