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l Blvd,North Ste D <br /> Sequoia 1455 McDowPetaluma CA 949544 <br /> (707)792-1865 <br /> Analytical FAX(707)792-0342 <br /> www sequoialabs corn <br /> db <br /> URS Corp-Sacrarnento Project Arco Site 6100,Tracy,CA P402493 <br /> 2870 Gateway Oaks Drive Suite 300 Project Number WR36619 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 03/17/04 15 30 <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 /> B39-107(P402493-07RE1)Soil Sampled 02/18/04 09 55 Received 02/19/04 10 00 HT-05 <br /> Surrogate Toluene-d8 113% 82-129 4030433 03/16104 03116104 EPA 8260B <br /> B39-114(P402493-08)Soil Sampled 02/18/04 10 48 Received 02/19/04 10 00 <br /> Ter(-amyl methyl ether ND 00050 mg/kg 1 4020581 02/26/04 02/26/04 EPA 8260B <br /> Benzene 0 073 00050 " <br /> Tert-butyl alcohol ND 010 " <br /> Di-isopropyl ether ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 " <br /> 1,2-Dichloroethane ND 00050 " <br /> Ethanol ND 020 " <br /> Ethylbenzene ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Toluene ND 00050 " <br /> Afteries(total) ND 00050 " <br /> rrogate Dibromofluoromethane 113% 81-126 " <br /> Surrogate 12-Dichloroethane-d4 108% 73-131 " <br /> Surrogate Toluene-d8 96% 82-129 <br /> B39-125(P402493-09)Soil Sampled 02/18/0411 15 Received 02/19/0410 00 <br /> Tert-amyl methyl ether ND 00050 mg/kg 1 4020565 02/25/04 02/26/04 EPA 8260B <br /> Benzene ND 00050 " <br /> Tert-butyl alcohol ND 0 10 " <br /> Di-isopropyl ether ND 00050 " <br /> 1,2-Dibromoethane(EDB) ND 00050 " <br /> 1,2-Dichloroethane ND 00050 " <br /> Ethanol ND 0 20 " <br /> Ethylbenzene ND 00050 " <br /> Ethyl tert-butyl ether ND 00050 " <br /> Methyl tert-butyl ether ND 00050 " <br /> Toluene ND 00050 " <br /> Xylenes(total) ND 00050 " <br /> Surrogate Dibrornofluoromethane 108% 81-126 " <br /> Surrogate 1 2-Dichloroethane-d4 102% 73-131 " <br /> Surrogate Toluene-d8 98% 82-129 " <br /> 0uoia 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 10 of 25 <br />