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Drive <br /> Sequoia 895 <br /> Hill Cts 5037 <br /> Morgan}Edi CA 95037 <br /> Analytical <br /> a— ) (408)7759600 <br /> FAX(408)782 5398 <br /> www sequoialabs cam <br /> URS Corporation[Arco I j Project ARCO#6020,Manteca,CA MPA 1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOCI 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 /> Analyse Rcsult Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-10(MPA1407-06RE1)Water Sampled 01/25/06 12 15 Received 07/27/06 08 30 <br /> tert-Amyl methyl ether ND 050 ugA I 6BOS009 02/08/06 02/08/06 EPA 8260E <br /> Di-isopropyl ether ND 050 <br /> Ethyl tert-butyl ether ND 050 <br /> Methyl tert-butyl ether ND 050 <br /> MW-11 (MPA1407-07)Water Sampled 01/25/06 11 55 Received 01/27/06 08 30 <br /> tert-Butyl alcohol ND 20 ug/I I 6BO9003 02/08/06 02/08/06 EPA 8260B <br /> Ethanol ND 300 " " IC <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate I 1-Dichloroethane-d4 124% 60-135 " » <br /> Benzene ND 0 50 6BO8009 02/08/06 02/08/06 <br /> Bromobenzene ND 050 " <br /> Bromochloromelhane ND 050 " <br /> Bromodtchloromethane ND 0 50 " <br /> 40romoform ND 050 <br /> romomethane ND 10 <br /> sec-Butyl benzene ND 050 " <br /> tert-Butylbenzene ND 050 " <br /> n-Butylbenzene ND 050 <br /> Carbon tetrachloride ND 050 „ <br /> Chtorobenzene ND 050 „ <br /> Chloroethane ND 1 0 <br /> Chlorofoirn ND 050 <br /> Chloromethane ND 050 " <br /> 2-Chlorotoluene ND 0 50 " <br /> 4-Chlorotoluene ND 0 50 <br /> 1,2-Dtbromo-3-chloropropane ND 10 <br /> Dlbromochloromethane ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 <br /> Dtbromomethane ND 0 50 " <br /> 1,2-Dichlorobenzene ND 050 <br /> I,3-Dichlorobenzene ND 050 " <br /> 1,4-Dichlorobenzene ND 050 „ <br /> Dichlorodifluoromethane ND 050 Ik <br /> 1,1-Dichloroethane ND 050 " <br /> 1,2-Dtchloroethane ND 0 50 <br /> 1,1-Dtchloroethene ND 050 „ <br /> its-1,2-Dtchloroethene ND 0 50 <br /> trans-1,2-Dtchloroethene ND 050 " <br /> 1,2-Dtchloropropane ND 050 " <br /> Sequoia Analytical-Morgan Hill The results to this report apply to the samples analyaed to 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 in its entirety <br /> Page 15 of 28 <br />