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ve <br /> 5QSequoia 8Hi Jarvis 5037 <br /> llUla Hargan Hill CA 95037 <br /> (408)776-9600 <br /> � Analytical FAX equoi lab 6308 <br /> orn <br /> www sequoealabs com <br /> 0 <br /> URS Corporation(Arcot) Project ARCO 45469, Stockton,CA MPC0315 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reported <br /> Sacramento CA,95833 Project Manager day Johnson 03/30/06 14 47 <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-1 (MPC0315-01)Water Sampled 03/06/06 09 24 Received 03/06/06 15 20 <br /> tert-Amyl methyl ether ND 050 ug/l 1 6C18001 03/18/06 03/18/06 EPA 8260E <br /> Benzene ND 050 " <br /> tert-Butyl alcohol ND 20 " <br /> Di-isopropyl ether ND 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane ND 050 " <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 0 50 " <br /> Methyl tert-butyl ether 3 8 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 <br /> Gasoline Range Organics(C4-C 12) ND 50 " <br /> Surrogate 1,2-Dichloroethane-d4 92% 60-135 <br /> u"�gate Toluene-d8 118% 70-120 " <br /> urrogate Dibromofluoromethane 92% 65-130 " <br /> Surrogate 4-Bromofluorobenzene 108% 70-120 or " <br /> MW-4(MPCO315-02)Water Sampled 03/06/06 10 10 Received 03/06/06 15 20 <br /> tert-Amyl methyl ether ND 50 ug/l 10 6C18001 03/18/06 03/18/06 EPA 8260B <br /> Benzene 55 50 " <br /> tert-Butyl alcohol ND 200 " <br /> Di-isopropyl ether ND 5 0 " <br /> 1,2-Dtbromoethane(EDB) ND 50 " <br /> 1,2-Dtchloroethane ND 50 " <br /> Ethanol ND 3000 " <br /> Ethyl tert-butyl ether ND 50 " <br /> Ethylbenzene ND 5 0 " <br /> Methyl tert-butyl ether 880 5 0 <br /> Toluene ND 5 0 " <br /> Xylenes(total) ND 5 0 " <br /> Gasoline Range Organics(C4-C12) 640 500 " <br /> Surrogate 12-Dichloroethane-d4 101 % 60-135 " <br /> Surrogate Toluene-d8 107% 70-120 <br /> Surrogate Debromofluoromethane 107% 65-1.30 <br /> Surrogate 4-Bromofluorobenzene 99% 70-120 <br /> �uota Analytical- Morgan Hill The results in this report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherivise stated results are reported on a wet weight bases <br /> This analytical report must be reproduced in its emirety <br /> Page 5 of 29 <br />