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885 Jarvis Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> � Analytical <br /> 11) (408)7 -9600 <br /> FAX(408)78922-6308 <br /> www sequoialabs com <br /> • <br /> URS Corporation[Arcot] Project ARCO#6020,Manteca,CA MPA1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC I V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/14/06 09 04 <br /> Volatile Organic Compounds by EPA Method 8260E <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-12(MPA1407-08RE1)Water Sampled 01/25/06 12 00 Received 01/27/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/1 I 6B08009 02!08106 02/08/06 EPA 8260B <br /> Di-isopropyl ether ND 050 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> MW-13D(MPA1407-09)Water Sampled 01/25/06 12 50 Received 01/27/06 08 30 <br /> tert-Butyl alcohol ND 20 ug/l 1 6BO8003 02/08/06 02/08/06 EPA 8260E <br /> Ethanol ND 300 IC <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 12-Dichloroethane-d4 127% 60-135 <br /> Benzene ND 050 6BO8009 02/08/06 02/08/06 <br /> Bromobenzene ND 050 " <br /> Bromochloromethane ND 050 " <br /> Bromodichloromethane ND 050 <br /> Bromoform ND 050 <br /> omomethane ND 10 <br /> WButylbenzcne <br /> ND 0 50 " <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 050 " <br /> 4-Chlorotoluene ND 050 " <br /> 1,2-Dibromo-3-chloropropane ND 10 <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 /> I,1-Dichloroethane ND 050 " <br /> 1,2-Dichloroethane ND 050 <br /> 1,1-Dichloroethene ND 050 " <br /> cis-I,2-Dichloroethene ND 050 " <br /> trans-l,2-Dichloroethene ND 050 " <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 stated results are reported on a wet weight basis <br /> . This analytical report must be reproduced in its entirety <br /> Page 19 of 28 <br />