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a__ � <br /> 8B5 ,CA Drive <br /> Sequoia Morgan Hill,CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> WWW sequmalabs com <br /> URS Corporation[Arco II Project ARCO#6020,Manteca,CA MPA1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOCI V-0002 Reported <br /> Sacramento CA,95833 Project Manager Vernon P Elarth 02/14/06 09 04 <br /> Volatile Organic Compounds by EPA Method 82605 <br /> Sequoia Analytical - Morgan Hill <br /> Repotting <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> MW-6(MPA1407-02)Water Sampled 01/25/061300 Received 01/27/06 08 30 <br /> 1,3-Dtchloropropane ND 050 ug/1 1 6BO8009 02/08/06 02/08/06 EPA 8260B <br /> 2,2-Dtchloropropane ND 20 <br /> IJ-Dichloropropene ND 050 " <br /> Ethylbenzene ND 050 <br /> Hexachlorobutadiene ND 20 <br /> Isopropylbenzene ND 050 " <br /> Methylene chloride ND 050 <br /> Naphthalene ND 5 0 <br /> p-IsopropyltoIuene ND 050 " <br /> n-Propylbenzene ND 0 50 <br /> Styrene ND 050 " <br /> I,1,1,2-Tetrachloroethane ND 050 <br /> 1,1,2,2-Tetrachloroethane ND 050 <br /> Tetrachloroethene ND 050 " <br /> 0oluenc ND 050 " <br /> ,2,3-Tr3chlorobenzene ND 050 <br /> 1,2,4-Trtchlorobenzene ND 050 " <br /> 1,1,1-Trichloroethane ND 050 <br /> 1,1,2-Trichloroethane ND 050 " <br /> Trichloroethene ND 050 <br /> Trichlorofluoromethane ND 050 " <br /> 1,2,3-Tnchloropropane ND 050 " <br /> 1,2,4-Trimethylbenzene ND 050 <br /> I,3,5-Trimethylbenzene ND 050 <br /> Vinyl chloride ND 050 <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 110% 65-130 <br /> Surrogate 12-Dichloroethane-d4 116% 60-135 " <br /> Surrogate Toluene-d8 105% 70-120 <br /> Surrogate 4-Bromofluorobenzene 95% 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 6 of 28 <br />