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1455 McDowell Blvd North Ste 1] <br /> Sequoia Petaluma CA 94954 <br /> (707)792 1865 <br /> FAX(707)792 0342 <br /> Analytical www sequwalabs corn <br /> 0 <br /> URS Corp-SacramentoProtect Arco Site 6100,Tracy,CA P409i 17 <br /> 2870 Gateway Oaks Drive Suite 340 Project Number WR36619 Reported <br /> Sacramento CA,95833 Protect Manager Jay Johnson 09/21/04 09 47 <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 /> Domestic Well(P409117-09)Water Sampled 09/07/04 05 05 Received 09/07/04 16 55 <br /> Tert-amyl methyl ether ND 1 0 ug/l 1 4090417 09/16/04 09/17/04 EPA 8260B <br /> Benzene ND 0 50 <br /> Tert-butyl alcohol ND 20 <br /> Di-isopropyl ether ND 10 <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> 1,2-Dtchloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 050 <br /> Ethyl tent-butyl ether ND 10 " <br /> Methyl tert-butyl ether ND 0 50 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 0 50 <br /> Surrogate Dibromofluorom ethane 102% 84-122 " <br /> ogate 1,2-Dtchloroethane-d4 103% 74-135 <br /> 'Wogate Toluene-d8 100% 84-119 ii <br /> Surrogate 4-Bromofluorobenzene 109% 86-119 <br /> vola Analytical -Petaluma 1 he results to this report apply to the samples analyzed in accordance with the chain oi <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 9 of 15 <br />