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tl <br /> D7885 Jarvis Drive <br /> Sequoia Morgan Hill CA 950375037 <br /> (408)776-9600 <br /> Analytical FAX(408)782 6308 <br /> www sequoislabs com <br /> URS Corporation[Arco I] Project ARCO#6020,Manteca,CA MPA 1407 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOC 1 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 j <br /> Analyte Result Limit Units Dilution Batch Prepared Analyzed Method Note <br /> I <br /> MW-13D(MPA1407-09)Water Sampled 01/25/06 12 50 Received 01/27/06 08 30 <br /> 1,3-Dichloropropane ND 050 ug/I 1 6BO8009 02/08/06 02/08/06 EPA 8260E <br /> 2,2-Dichloropropane ND 20 ^ <br /> 1,1-Dichloropropene ND 050 " <br /> Ethylbenzene ND 050 <br /> Hexachlorobutadtene ND 2 0 <br /> isopropylbenzene ND 050 <br /> Methylene chloride ND 050 <br /> Naphthalene ND 5 0 ^ <br /> I <br /> p-lsopropyltoluene 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 /> Tetrachforoethene ND 050 " <br /> Toluene ND 050 <br /> 02,3-Trichlorobenzene ND 050 <br /> 2,4-Trichlorobenzene ND 050 ^ <br /> 1,1,1-Trichloroethane ND 050 <br /> 1,1,2-Trichloroethane ND 050 <br /> Trichloroethene ND 0 50 <br /> Trichlorofluoromethane ND 050 ^ <br /> 1,2,3-TnchIoropropane ND 050 <br /> 1,2,4-Tnmethylbenzene ND 050 ^ <br /> 1,3,5-Tnmethylbenzene ND 050 ^ <br /> Vinyl chloride ND 050 " <br /> Xylenes(total) ND 050 " <br /> Surrogate Dibromofluoromethane 112% 65-130 <br /> Surrogate I2-Dichloroethane-d4 115% 60-135 " <br /> Surrogate Toluene-d8 106% 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 stared results are reported on a wet weight bm's <br /> . This analytical report must be reproduced in its entirety <br /> Page 20 of 28 <br />