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U' <br /> 1455 McDowell Blvd,North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792 1865 <br /> Analytical FAX(707) lobs cu 2 <br /> www sequoialabs coin <br /> URS Corp-Sacramento Project Arco Site 760,Lodi,CA P407056 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36622 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 07/26/04 11 37 <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-1 (P407056-01)Water Sampled 07/02/04 06 45 Received 07/02/04 15 15 <br /> Tert-amyl methyl ether ND 10 ugll 1 4070265 07/15/04 07/15/04 EPA 8260B <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-Dichloroelhane 2 2 0 50 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 " <br /> Ethyl tert-butyl ether ND 1 0 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 128% 84-122 Sol <br /> W <br /> gate 1 2-Dichloroethane-d4 134% 74-135 <br /> rogate Toluene-d8 113% 84-119 <br /> Surrogate 4-Bromofluorobenzene 97% 86-119 " <br /> MW-3(P407056-02)Water Sampled 07/02/04 07 05 Received 07102104 15 15 <br /> Tert-amyl methyl ether ND 1 0 ug/l 1 4070285 07/16/04 07/16/04 EPA 8260B <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 18 050 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 <br /> Ethyl tert-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibrornofluoromethane 123% 84-122 Sol <br /> Surrogate 1 2-Dichloroethane-d4 107% 74-135 " <br /> Surrogate Toluene-d8 108% 84-119 " <br /> Surrogate 4-Bromofluorobenzene 98% 86-119 " <br /> Sequoia Analytical- Petaluma The results in this report apply to the samples analyzed to accordance with the chain of <br /> custody document Unless otherwise slated results are reported on a wet weight basis <br /> This analytical report must be reproduced in its entirety <br /> Page 4 of 12 <br /> I <br />