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aas J8r Drive <br /> Sequoia MorganWll CAA 950375037 <br /> 4D <br /> (408)776-9600 <br /> FAX(408)782 6305 <br /> IW Analytical www sequoialabs com <br /> 0 <br /> URS Corporation lArcoll Project ARCO 46020,Manteca,CA MNH0330 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number NIP Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 09/16/04 12 03 <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-9(MNH0330-05)Water Sampled 08/05/04 11 10 Received 08/10/04 09 30 <br /> tert-Amyl methyl ether ND 050 ug11 I 4H 18002 08/18!04 08/18/04 EPA 8260B <br /> Benzene ND 0 50 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 0 50 " <br /> 1,2-Dichloroethane ND 0 50 <br /> Ethanol ND 100 " IC <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 81 % 78-129 " <br /> W-10(MNH0330-06)Water Sampled 08/05/04 11 35 Received 08/I0/04 09 30 <br /> 'Wert-Amyl methyl ether ND 050 ug/I 1 4H 19001 08/19/04 08/19/04 EPA 8260B <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 100 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether ND 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> Surrogate 1,2-Dichloroelhane-d4 86% 78-129 " <br /> Sequoia Analytical -Morgan Hili 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 /> • Thrs analytical report must be reproduced in its entirety <br /> Page 7 of 18 <br />