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CD <br /> BHi.,CA 5 <br /> 037 Dnve <br /> Sequoia Morgan HilE,CA9503T <br /> Analytical FAX(4408)( 08}7B2 b3 792 6308 <br /> 08 <br /> www sequoialabs corn <br /> • <br /> URS Corporation[Arcot] Project ARCO#6020,Manteca,CA MPA1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC1 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-12(MPA1407-08)Water Sampled 01/25/06 12 00 Received 01/27/06 08 30 <br /> 1,3-Dichloropropane ND 050 ug/l 1 6BO8009 02/08/06 02/08/06 EPA 8260B <br /> 2,2-Dichloropropane ND 20 " <br /> 1,1-Dichloropropene ND 050 <br /> Ethylbenzene ND 050 <br /> HexachlorobutadEene ND 2 0 " <br /> Isopropylbenzene ND 050 " <br /> Methylene chloride ND 050 " <br /> Naphthalene ND 5 0 " <br /> p-Isopropyltoluene ND 050 " <br /> n-Propylbenzene ND 050 " <br /> Styrene ND 050 " <br /> 1,1,1,2-Tetrachloroethane ND 050 " <br /> 1,1,2,2-Tetrachloroethane ND 050 " <br /> Tetrachloroethene ND 050 <br /> Toluene ND 0500 " <br /> 2,3-Trichlorobenzene ND 050 <br /> 2,4-Tnchl orobenzene ND 050 " <br /> I,I,I-Trichloroethane ND 050 " <br /> 1,1,2-Trichloroethane ND 050 <br /> Tnchloroethene ND 050 <br /> Trichlorofluoromethane ND 0 50 " <br /> 1,2,3-Trichloropropane ND 0 50 " <br /> 1,2,4-Trimethylbenzene ND 050 <br /> 1,3,5-Trimethy lbenzene ND 050 " <br /> Vinyl chloride ND 050 <br /> Xylenes(total) ND 050 <br /> Surrogate Dibromohuoromethane 114% 65-130 " <br /> Surrogate 1 2-Dichloroethane-d4 113% 60-135 <br /> Surrogate Toluene-d8 104% 70-120 " <br /> Surrogate 4-Bromohuorobenzene 94% 70-120 " <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 18 of 28 <br />