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Sequoia 8Hi 8)CA 5037 <br /> Morgan HtDlile <br /> 11 CA 95037 <br /> {408)776 9600 <br /> Analytical4D FAX equo lab 6308 <br /> www scyuoialabs com <br /> URS Corporation rArcol) Project ARCO#5469,Stockton,CA MPC0315 <br /> 2870 Gateway Oaks Dr,Ste 300 Project Number GOBZP-0010 Reported <br /> Sacramento CA 95833 Project Manager Jay 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-9(MPC0315-07)Water Sampled 03/06/06 04 24 Received 03/06/06 15 20 <br /> tent-Amyl methyl ether ND 030 ug/l 1 6C 1801I 03/18/06 03/19/06 EPA 8260B <br /> Benzene ND 050 PE <br /> tert-Butyl alcohol ND 20 " <br /> DI-Isopropyl ether ND 050 " <br /> I 2-Dlbromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 18 050 " <br /> Ethanol ND 300 " <br /> Ethyl tent-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 84 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasoline Range Organics(C4-C12), __ ND 50 <br /> Surrogate 12-Dichloroethane-d4 102% 60-135 <br /> urrogate Toluene-d8 102% 70-120 <br /> Surrogate Dtbromofluoromethane 104% 65-130 <br /> Surrogate 4-Bromofluorobrnzcne 98% 70-120 " <br /> MW-10(MPC0315-08)Water Sampled 03/06/060539 Received 03/06/06 15 20 <br /> Lett-Amyl methyl ether ND 050 ut/I € 6C18011 03/18/06 03/19/06 EPA 8260B <br /> Benzene ND 050 PE <br /> tent-Butyl alcohol ND 20 " <br /> Di-Isopropyl ether 2 1 050 " <br /> 1,2-Dibromoethane(EDB) ND 050 " <br /> 1,2-Dichloroethane 67 050 " <br /> Ethanol ND 300 " <br /> Ethyl tert-butyl ether ND 050 " <br /> Ethylbenzene ND 050 " <br /> Methyl tert-butyl ether 23 050 " <br /> Toluene ND 050 " <br /> Xylenes(total) ND 050 " <br /> Gasolme Range Organics(C4-C12) ND 50 T <br /> Surrogate 12-Dichloroethane-d4 102% 60-135 " <br /> Surrogate Toluene-d8 102% 70-120 " <br /> Surrogate Dibromofluoromethane 98% 65-130 <br /> Surrogate 4-Bromofluorobenzene 97°rb 70-120 <br /> Sequoia Analytical -Morgan Hill The results in thrs report apply to the samples analyzed in accordance with the chain of <br /> custody document Unless otherwise stated results are reported on a wet x eight basis <br /> This analytical report must be reproduced in its eivircty <br /> Page 8 of29 <br />