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IY <br /> 0 <br /> Sequoia 1455 McDowell Blvd,North Ste <br /> Petaluma,CA 949544 <br /> Anal tical (707)792-1865 <br /> FAX <br /> Y (707)792-0342 <br /> • www sequoialabs corn <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P401360 <br /> 2870 Gateway Oaks Dnve Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/06/04 09 57 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical-Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Nq-,ed Analyzed Method Notes <br /> MW-1 (P401360-01)Water Sampled 01/21/04 11 25 Received 01/21/04 14 10 <br /> Tert-amyl methyl ether ND 10 ugll 1 4020010 02/02/04 02/02/04 EPA 8260B <br /> Benzene ND 050 It <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1 0 <br /> 1,2-Dibromoethane(EDB) ND 050 ^ <br /> 1,2-Dichloroethane 17 050 <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tent-butyl ether ND 050 ^ <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate Dibromo luoromethane 107% 84-1120 " <br /> Surrogate 12-Dichloroethane-d4 96% 74-135 <br /> Surrogate Toluene-d8 104% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 100% 86-119 " <br /> MW-2(P401360-02)Water Sampled 01/21/04 11 55 Received 01/21/04 14 10 <br /> Tert-amyl methyl ether ND 10 ug4 1 4020010 02/02/04 02/02/04 EPA 826013 <br /> Benzene ND 050 " <br /> Tert-butyl alcohol ND 20 ^ <br /> Di-isopropyl ether ND 10 " <br /> 1,2-Dibromoethane(EDB) ND 050 ^ <br /> 1,2-Dichloroethane 19 050 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 <br /> Ethyl tent-butyl ether ND 1 0 <br /> Methyl tert-butyl ether 056 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate DibromoJluoromethane 110% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 96% 74-135 " <br /> Surrogate Toluene-d8 103% 84-119 ^ " <br /> Surrogate 4-Bromo luorobenzene 100% 86-119 " <br /> Sequoia 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 /> i <br /> basis This analytical report must be reproduced in its entirety <br /> Page 4 of 9 <br />