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Sequoia 895Jarvis Drive <br /> Morgan Hill CA 95037 <br /> (408)776-9600 <br /> Analytical FAX(408)782-6308 <br /> www sequoialabs coin <br /> URS Corporation(Arco]) Project ARCO 45469,Stockton,CA MPF0114 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number G013ZP-0010 Reported <br /> Sacramento CA,95833 Project Manager Jay Johnson 06/30/06 11 12 <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(MPF0114-09)Water Sampled 05/30/06 03 39 Received 05/31/06 08 30 <br /> tert-Amyl methyl ether ND 050 ug/I I 6FO7022 06/07/06 06/08/06 EPA 82646 <br /> Benzene ND 050 <br /> tert Butyl alcohol ND 20 " <br /> DI Isopropyl ether ND 050 <br /> 1,2-Dtbromoethane(EDB) ND 050 " <br /> 1,2-Dlchlaroethane 14 050 <br /> Ethanol ND 300 <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 1 2 050 <br /> Toluene ND 050 <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12) ND 50 <br /> rrogate 1 2-Dtchloroethane-d4 96% 60-145 <br /> rogale Toluene-d8 94% 70-130 <br /> urrugate Dtbromofluoromethane 96% 75-130 <br /> Surrogate 4-Bromofluorobenzene 95% 60-115 <br /> MW-10(MPF0114-10)Water Sampled 05/30/060437 Received 05/31/060830 <br /> tert-Amyl methyl ether ND 050 ug/I 1 6FO7022 46/07/06 06/08/06 EPA 82608 <br /> Benzene 0 63 0 50 " <br /> tert Butyl alcohol ND 20 <br /> DI-Isopropyl ether 2 5 050 " <br /> 1,2-Dtbromoethane(EDB) ND 050 <br /> 1,2-Dlchloroethane 9 1 0 50 " <br /> Ethanol ND 300 <br /> Ethyl tert-butyl ether ND 050 <br /> Ethylbenzene ND 050 <br /> Methyl tert-butyl ether 21 050 <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 92016 60-145 " <br /> Surrogate Toluene-d8 92% 70-130 " <br /> Surrogate Dibromofluoromethane 95% 75-130 " <br /> Surrogate 4-Bromofluorobenzene 95% 60-115 " <br /> Sequoia Analytical-Morgan Hill The results in this report apply g Po pp y to the samples analyzed an accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet weight basis <br /> Thes analytical report must be reproduced in its entirety <br /> Page 8 of 20 <br />