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Drive <br /> a— ) (408) <br /> 885 TarnsSequoia MorganHtll CA 95037 <br /> 5037Analytical FAX 776 9300 <br /> (408)782-6308 <br /> WWW sequmalabs corn <br /> URS Corporation[Arco]] Project ARCO#2186,Stockton,CA M010313 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number 60BZM-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/28/05 10 46 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Now. <br /> VW-111(MOI0313-09)Water Sampled 09/08/05 08 47 Recegved 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 25 ugll 5 5120037 09/20/05 09/21/05 EPA 8260E <br /> Benzene ND 25 " <br /> tert-Butyl alcohol ND 100 " <br /> Dl-isopropyl ether ND 2 5 " <br /> 1,2-Dibromoethane(EDB) ND 25 " <br /> 1,2-Dichloroethane 52 25 " <br /> Ethanol ND 500 <br /> Ethyl tert-butyl ether ND 25 " <br /> Ethylbenzene ND 2 5 " <br /> Methyl tert-butyl ether 110 2 5 " <br /> Toluene ND 2 5 " <br /> Xylenes(total) ND 25 " <br /> Gasoline Range Organics(C4-C12) ND 250 " <br /> Surrogate 1 2-Dichloroethane-d4 84% 60-135 " <br /> VW-2B(MOI0313-10)Water Sampled 09/08/05 09 49 Received 09/09/05 07 55 <br /> tert-Amyl methyl ether ND 050 ug/1 1 5I20037 09/20/05 09/21/05 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) 2 0 050 " <br /> I,2-Dichloroethane 11 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 0 50 " <br /> Ethylbenzene 3 5 050 " <br /> Methyl tert-butyl ether 52-1- 050 " <br /> Toluene 1 3 a 0 50 " <br /> Xylenes(total) 60 - 050 " <br /> Gasoline Range Organics(C4-C12) 78-0 50 " <br /> Surrogate 1,2-Dichloroethane-d4 84% 60-135 " <br /> Sequoia Analytical-Morgan Hill 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 /> . This analytical report must be reproduced to its entirety <br /> Page 7 of 12 <br />