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a— ) <br /> 88sl,CA 5037 ve <br /> Sequoia MorganHtll,CA95037(408)776-9600 <br /> �r Analytical FAX(408)782-6308 <br /> www sequoialabs com <br /> URS Corporation[Arcol) Project ARCO#6020,Manteca,CA MPA1407 <br /> 2870 Gateway Oaks DT,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 8260B <br /> Sequoia Analytical-Morgan Hill <br /> Reporting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-10(MPA1407-06)Water Sampled 01/25/0612 15 Received 01/27/06 08 30 <br /> 1,3-Dichloropropane ND 050 ug/1 1 6B08009 02/08/06 02/08/06 EPA 8260B <br /> 2,2-Dichloropropane ND 20 " <br /> I,1-Dichloropropene ND 050 " <br /> Ethylbenzene ND 050 " <br /> Hexachlorobutadiene ND 20 " <br /> Isopropylbenzene ND 050 " <br /> Methylene chloride ND 050 <br /> Naphthalene ND so <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 0 50 <br /> ,2,3-Tnchlorobenzene ND 050 " <br /> 1,2,4-Tnchlorobenzene ND 0 50 " <br /> 1,1,1-Trichloroethane ND 050 <br /> 1,1,2-Tnchloroethane ND 0 50 " <br /> Tnchloroethene ND 0 50 <br /> Trichlorofluoromethane ND 0 50 " <br /> 1,2,3-Trichloropropane ND 050 " <br /> 1,2,4-Trimethylbenzene ND 0 50 <br /> 1,3,5-Trimethylbenzene ND 050 " <br /> Vinyl chloride ND 050 <br /> Xylenes(total) ND 0 50 <br /> Surrogate Dibromofluoromethane III % 65-130 " <br /> Surrogate 12-Dichloroethane-d4 119% 60-135 " <br /> Surrogate Toluene-d8 104% 70-120 <br /> Surrogate 4-Bromofluorobenzene 93% 70-120 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply to the samples analyzed in accordance with the churn of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> 0 This analytical report must be reproduced in its enitrety <br /> Page 14 of 28 <br />