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1455 McDowell Blvd North Ste D <br /> Sequoia Petaluma CA 94954 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs cam <br /> 78_S Corp-Sacramento Project Arco Site 6100,Tracy,CA P403414 <br /> 0 Gateway Oaks Drive Suite 300 Project Number WR36619 Reported <br /> ramento CA,95833 Project Manager Jay Johnson 04/01/04 16 41 <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 /> VW-6(P403414-05)Water Sampled 03/16/04 05 50 Received 03/17/0410 00 <br /> Tert-amyl methyl ether ND 200 ug/l 200 4030800 03/27/04 03/28/04 EPA 8260B <br /> Benzene 4800 100 " <br /> Tert-butyl alcohol ND 4000 <br /> Di-isopropyl ether ND 200 <br /> 1,2-Dibromoethane(EDB) ND 100 <br /> 1,2-Dtchloroethane ND 100 <br /> Ethanol ND 20000 " <br /> Ethylbenzene ND 100 " <br /> Ethyl tert-butyl ether ND 200 <br /> Methyl tert-butyl ether 170 100 " <br /> Toluene ND 100 <br /> Xylenes(total) ND 100 " <br /> Surrogate Dibromofluoromethane 100% 84-122 " " <br /> rgte 1,2-Dichloroethane-d4 103% 74-135 <br /> ;"O'te Toluene-d8 102% 84-119 <br /> Surrogate 4-Bromofluorobenzene 101 % 86-119 " <br /> Domestic Well(P403414-06)Water Sampled 03/16/040635 Received 03/17/041000 <br /> Tert-amyl methyl ether ND 10 ug/1 1 4030800 03/27/04 03/28/04 EPA 8260E <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 ND 050 <br /> Ethanol ND 100 " <br /> Ethylbenzene ND 0 50 " <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 100% 84-122 " <br /> Surrogate 12-Dtchloroethane-d4 101 % 74-135 " <br /> Surrogate Toluene-d8 101 % 84-119 <br /> Surrogate 4-Bromgfluorobenzene 104% 86-119 <br /> �ola 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 /> basis This analytical report must be reproduced in its entirety <br /> Page 6 of 10 <br />