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Sequoia 1455 McDowell Blvd CA Ste Petaluma.CA 949544 <br /> (707)792-1865 <br /> . IW Analytical FAX(707)792-0342 <br /> www sequotalabs coin <br /> s <br /> URS Corp-Sacramento Project Arco Site 434,Lodi,CA P310098 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number Intnm 50433 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 10/15/03 16 54 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical - Petaluma <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Notes <br /> W-3(P310098-05)Water Sampled 09/29/03 10 20 Received 09/30/03 16 01 <br /> Tert-amyl methyl ether ND 10 ug/I 1 3100252 10/10/03 10/10/03 EPA 8260B <br /> Benzene ND 050 <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 10 „ <br /> 1,2-Dichloroethane ND 0 50 <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 Dibromo luoromethane 102% 84-122 " <br /> Surrogate 12-Dichloroethane-d4 101 % 74-135 " <br /> Surrogate Toluene-d8 89% 84-119 " <br /> rrogate 4-Bromofluorobenzene 97% 86-119 " <br /> -9(P310098-06)Water Sampled 09/29/03 10 00 Received 09/30/03 16 01 <br /> Tert-amyl methyl ether ND 10 ug/I 1 3100252 10/10/03 10/10/03 EPA 9260B <br /> Benzene ND 0 50 <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 1 0 " <br /> 1,2-Dichloroethane ND 050 " ^ <br /> Ethanol ND 100 <br /> Ethylbenzene ND 050 <br /> Ethyl tert-butyl ether ND 10 <br /> Methyl cert-butyl ether ND 050 <br /> Toluene ND 0 50 " ^ <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromelhane 102% 84-122 <br /> Surrogate 1 2-Dichloroethane-d4 105% 74-135 " <br /> Surrogate Toluene-d8 88% 84-119 <br /> Surrogate 4-Bromo,Jluorobenzene 95% 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 /> is This analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />