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` 885 Jarvis Drive <br /> ta) Sequoia Morgan Hill CA 95037 <br /> (408)776 9600 <br /> IW Analytical FAX(408)7826308 <br /> www sequoialabs com <br /> URS Corporation[Arco I] Project ARCO#6020,Manteca,CA MPA 1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC1 V-0002 Reported <br /> Sacramento CA,95833 Prosect Manager Vernon P Elanh 02/14/06 09 04 <br /> Volatile Organic Compounds by EPA Method 8260B <br /> Sequoia Analytical -Morgan Hill <br /> Reporting <br /> Analyte Result Limit tJmts Dilution Batch Prepared Analyzed Method Note <br /> MW-5(MPA1407-01RE1)Water Sampled 01/25/0612 10 Received 01/27/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/I 1 6808009 02108!06 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-6(MPA1407-02)Water Sampled 07/25/06 13 00 Received 01/27/06 08 30 <br /> tert-Butyl alcohol ND 20 ugll 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-Dchloroethane-d4 121 % 60-135 <br /> Benzene ND 050 6808009 02/08/06 02!08106 " <br /> Bromobenzene ND 050 <br /> Bromochloromethane ND 050 " <br /> Bromodichloromethane ND 050 <br /> romoform ND 050 <br /> romomethane ND 10 <br /> sec-Butylbenzene ND 050 <br /> tert-Butylbenzene ND 050 <br /> n-Butylbenzene ND 0 50 " <br /> Carbon tetrachloride ND 0 50 " <br /> Chlorobenzene ND 050 " <br /> Chloroethane ND 10 <br /> Chloroform ND 050 " <br /> Chloromethane ND 050 " <br /> 2-Chlorotoluene ND 0 50 " <br /> 4-Chlorotoluene ND 050 <br /> 1,2-Dibromo-3-chloropropane ND l0 " <br /> Dibromochloromethane ND 0 50 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 <br /> Dibromomethane ND 050 " <br /> 1,2-Dicblorobenzene ND 050 " <br /> 1,3-Dichlorobenzene ND 050 " <br /> 114-Dichlorobenzene ND 050 " <br /> Dichlorodifluoromethane ND 050 <br /> 1,1-Dichloroethane ND 050 <br /> 1,2-Dichloroethane ND 050 " <br /> I,1-Dichloroethene ND 050 <br /> cis-t,2-Dichloroethene ND 050 " <br /> trans-l,2-Dichloroelhene 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 char,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 5 of 28 <br />