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885 Jarvis Dnve <br /> Sequoia Morgan Hill CA 95037 <br /> (408)776 9600�r Analytical FAX(408)782-6308 <br /> www,segooialabs com <br /> i <br /> r <br /> URS Corporation[Arco I] Project ARCO#6020,Manteca,CA MPA1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC 1 V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/14/06 09 04 <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 Note <br /> MW-7(MPA1407-03REI)Water Sampled 01/25/06 12 45 Received 01/27/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/l 1 6BO8009 02/08/06 02/08/06 EPA 8260B <br /> Di-isopropyl ether ND 050 <br /> Ethyl Cert-butyl ether ND 050 <br /> Methyl cert-butyl ether ND 050 " <br /> MW-8(MPA1407-04)Water Sampled 01/25/061225 Received 01/27/06 08 30 <br /> tert-Butyl alcohol ND 20 ug/l 1 6BO8003 02/08/06 02/08/06 EPA 8260B <br /> Ethanol ND 300 " " 1C <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1 2-Dichloroethane-d4 124% 60-135 " <br /> Benzene ND 050 6BO8009 02/08/06 02/08/06 <br /> Bromobenzene ND 050 « <br /> Brornochloromethane ND 050 " <br /> Bromodichloromethane ND 050 " <br /> romoform ND 050 " <br /> romornethane ND 10 <br /> see-Butyl benzene ND 050 <br /> ter[-Butylbenzene ND 050 " <br /> n-Butylbenzene ND 050 " <br /> Carbon tetrachloride ND 050 <br /> Chlorobenzene ND 050 " ^ <br /> Chloroethane ND 10 <br /> Chloroform ND 050 ^ <br /> Chloromethane ND 050 ^ <br /> 2-Chlorotoluene ND 0 50 " <br /> 4-Chloro[oluene ND 050 " ^ <br /> 1,2-Dibromo-3-chloropropane ND 1 0 " ^ <br /> Dibromochloromethane ND 050 " ^ <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Dibromomethane ND 050 <br /> 1,2-Dichlorobenzene ND 050 " <br /> 1,3-Dichlorobenzene ND 050 <br /> 1,4-Dichlorobenzene ND 050 " ^ <br /> Dichlorodifluoromethane ND 050 <br /> 1,1-Dichloroethane ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> 1,1-Dichloroethene ND 050 " <br /> cis-1,2-Dichloroethene ND 050 ^ <br /> trans-1,2-Dichloroethene ND 0 50 ^ <br /> 1,2 Dichloropropane ND 050 " ^ <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 slated results are reported on a wet weight basis <br /> 0 This analytical report must be reproduced in its entrrery <br /> Page 9 of 28 <br />